Radial Pole Chuck

Having a problem with your round magnetic chuck because the magnetic grip does not extend to the edge of the chuck? Solve this problem with a RED-I-GRIP radial pole magnetic chuck. These chucks have a strong magnetic grip that extends to the edge of the chuck leaving no ‘dead’ areas as well as generating up to 16kg/ cm2 direct pull. Other features to look for when selecting a magnetic chuck are • A reliable ON/OFF switch system to ensure long life of the chuck as well as being able to be partially switched on whenever full grip is not needed. • Chucks should always be sealed against coolant and di-electric fluid to ensure safety if working on EDM equipment. • A chuck should have a strong grip to allow the grip diameter to be increased by using horizontal pole extensions and the use of vertical pole extensions should allow the chuck to be used on jobs without a flat grip surface. • The radial pole chuck should also be able to be mounted on lathes, grinders and wherever extra powerful grip is needed Also note that if a chuck has a centre hole it will allow non-magnetic plugs to be used to accurately centre jobs whereas a chuck without a centre hole can be machined after mounting to centre the hole to be concentric with the machine spindle axis. source: www.robinsoninternational.com.au

LED lights for homes

LED lights provide many advantages. One of the important features of LED lights that it lowers the expenses and also allows being environmental friendly.  Another key element that attributes to these types of lamps is the amount of resistance to heat along with cold temperature.  The common type of LED lights lasts somewhere within 70,000 and 100,000 hours.

While making a choice with any LED lights for your home at first check the wattage connected with the light bulb and find that how much light can meet your needs. The higher will be the wattage the greater energy will produce to use the lights. When you are buying LED lights for your home, you will see that the wattage is rated from 1 to 5. The wattage should not be end up being too high as this can save your more money over time. 

While doing research on LED lights another thing that you need to think is the lumens of the light. The higher will be the lumens the brighter will be the light. There are different types of LED light bulbs which will give you different of light beams.  The one type will give you wide lightning area. This type of bulbs are perfect when you work, read on small projects. Another type will give you a focused light beam for compact enclosures like cupboard, garden shed or in smaller space this focused design lights are good. Old fashioned or incandescent light bulbs give off large amounts of sulfur dioxide and carbon dioxide directly into the air that we breathe.

Nowadays, LED technologies are improving rapidly and you can get LED Downlights and bulbs.  LED Downlights are capable to produce the same amount of illumination that a normal 50W halogen light will produce for only 10W which means that 5 times less energy is used. As a result, you can save 5 times more money on the lightning bills and it also does 5 times less harm to the environment.
The only problem with the LED Downlights is that it is expensive than regular halogens or Downlights. Though they are expensive, but it has a long lifespan. Incandescent lights are cheaper, but later you will have to change it or call any professional to do it.  With LED Downlights you do not have to worry about replacing it. So you can save your money.
LED Downlights have a color temperature component which includes cool white and warm white. 

Warm lights are measured in decreased amount of numbers while cool white is increased. If you are seeking bulbs for the area of high activities like laundry rooms, kitchens then cool white is an ideal one. As the light is brighter and helps the person to focus on the task. Warm white is good for living rooms, bathrooms; bedrooms as it create a personal atmosphere.  If you want a comfortable and relaxing environment, then choose warm white.

LED lights are revolutionizing lightning. Being designed as retrofit system will help to slash the energy bills by 5 fold and also increase the home safety.

Benefits of jumping castle hire and marquee hire

There are lots of benefits of marquee hire. Marquee gives a stylish canopy that gives a shelter from the unpredictable weather conditions like sunshine, rainfall and strong winds. People hire, marquee for the wedding reception and others arrange the entire wedding inside the marquee. You can arrange everything from wedding ceremony, wedding lunch, wedding reception meal, speeches, and even disco afterwards.

On the market there are two types of marquee hire is available. The first and the common type is the clear span. This type of marquees is very large tents which do not have the need of any metal support struts. It means that their interior is clear from the internal poles and framework.  The benefit of this type of marquees is that you can organize your interior space at your wedding marquee.

The second type is called the shaped marquee. It is either hexagonal or octagonal in shape. These marquees can be used as secondary marquees that can be used for the caterers who need space for the food preparation. These marquees can also be used as an alternative to the traditional marquees when a different shaped marquee option is needed to fit into the required space.

When you are organizing marquee hire for weddings you have to decide that how many guests are you inviting and what furniture, décor, staging you require. So that you can decide that what exactly size you need to hire.  Other factors like the location of the wedding, time of the year require furniture, audio or visual requirement to hire. All these factors are important as these can have an impact on the marquee hire process.

Jumping castle hire is a great way to have fun. It might be very expensive to buy for few children’s.  Jumping castle hire may be a hectic task depending how you choose to go about it.  While seeking a jumping castle hire you need to consider few things like word of mouth recommendations.  This kind of recommendation can be obtained from friends.

The next thing that you need to consider is the type of bouncing castle that you need. There are different designs. The designs range from Disney to combo and it comes in different colors.  For any buyer working with the budget is essential. In the market, there are different hire prices, but you can get an affordable price if you compare the ones that are on offer.  As the children’s will use the jumping castle for the fun activities, it is important to make sure that it is safe. Before purchasing it inspect the jumping castle.

When you are hiring or buying a jumping castle make sure to look for the company whether they specialize to provide the high quality customer service or not. The distance that the company needs to travel can make a difference in the price. But there are some companies who deliver and will do the setup without any charge. Without a doubt adding a jumping castle will take your party to another level.

Backyard log cabins

With the advent of modern construction and cranes techniques log homes are popular in rural as well as in suburban areas. The logs are visible as the exterior and interior of the house sometimes. Lots of people dream for log cabins in great locations. The location and size of the plot, determine some of the constraints place of the cabin. A backyard cabins should be used as a pleasant evening retreat. There are large selections of backyard cabins to create a perfect outdoor retreat.

A backyard cabins are set in the middle of the green space and people around the world liked it.  If the backyard cabin is built of log it adds a style and glamour to the house.  The size and style of the log depend on the requirements and on the budget. Before buying it, take an overview of the position and size of the plot. You have to also consider the desired square footage and access to the services like sewers, water and power.

If you want an ideal solution to store all your gardening tools and equipment or want add a design to your backyard cabins then building it with logs is a great decision.  Log cabins are cheaper as well as attractive. The logs are used to give a different appeal to these cabins. Different log cabins are built from logs with varied thickness because thick logs are generally used in large cabins to add some extra insulation and strength.

In earlier days log cabins were built like wooden fences by setting it in different sized perpendicularly in gutter to form a wall of the cabin. Nowadays the logs are placed parallel to each other and connect the last part with notches. It can be built by any manufacturer or construction company. Sometimes people also buy it in a kit form for self builds.

Many people prefer these cabins as they are low price compared to the traditional brick built houses.  There are several companies who specialize to construct log cabins. So you can easily find one company for yourself. As these cabins are made of wood it is easy to reconstruct and maintenance.  The price depends on the structure, size and other details. The construction of a cabin depends on many factors like the type of doors and windows, the size. Log cabins last for hundreds of years and can be built easily.  The logs that are used for building the cabins should be selected very carefully. The logs with fewer knots are easily smoothed leaving a minimum gap between the logs.

Once you have decided that what type of cabin you will build then decide whether you will build it yourself or hire a builder. It is worth your time if you select a reputable manufacturer and directly buy from them.  These cabins are sturdy, warm, environmental friendly, durable and high quality houses. The major consideration of building log cabins is how you can cool and heat your home. In recent years furnaces and wood burning stoves have become very popular.

Roller and venetian blinds in Sydney

If you want a new look or want to update your home design know the benefits of the roller blinds Sydney offer for interior decoration. Roller blinds Sydney are an excellent alternative to the standard venetian blinds or shades.  Cheap roller blinds suits those with the limited remodeling budgets, have a vast array of styles, types and different colors which can make your home come alive. It is very versatile and also easy to install. Though they are little expensive, but it offers unique advantages that you will not found in other window treatments.

When you will select roller blinds Sydney look for sturdy construction which includes hem rails and roller tubes. Generally, aluminum is used for roller blinds as it offers durability and strong tensile strength without adding a great deal of weight to the blind.  It should be designed, logically and attractive.  Check that the hem rails are heavy, so that it allows the blind to hang properly when mounted.  There is another feature that you should look for is the one step push button release for blind. It allows easy replacement of the worn blinds without removing the mounting hardware and existing brackets.

Roller blinds Sydney are ideal for bathrooms and kitchens. It gives a blackout in the bedrooms and thermal insulation as well. They are very easy to fit and are very stylish for any room in the house. The specialist systems allow it to use in double gazed windows and doors, and conservatories and in sloping roof windows also.

Venetian merchants discovered the venetian blinds. It is very popular and can be found in all households as it is very simple and also give effective protection from the sunlight.  Blinds consist of slats of overlapping and horizontal material. It allows the blinds to be used in various fashions. There are four types of venetian blinds.

Wooden venetian blinds are made of many types of wood. It can give an elegant and exotic look. It can be crafted with great intricacy. Wooden venetian blinds are the most expensive one. Lightweight aluminum venetian blinds are of many colors. Many people choose this type as it has many colors and it also looks very attractive. This type is more durable than the wooden and do need so much maintenance and care.  This can be used in both homes and commercial premises.

PVC venetian blinds are inexpensive, practical and long lasting. It also has many colors. It can be placed on the windows in any room of your home. But these types are ideal in rooms like kitchens and bathrooms where moisture occurs. Mini venetian blinds have very narrow slats and can block more light coming from a window. These blinds are ideal in the bedrooms.

The key to use venetian blinds as window covering is to ensure that they are hung correctly. If it is crooked then it will not work properly as pulleys and will create an askew effect. It does not matter that how stylish the venetian blinds are it will not look beautiful if it do not work.

Glass repair and replacement

The car glass replacement is a difficult task. All companies do not do glass replacement. The replacement can be of any vehicle like car, truck, bus and motorbike. Replacement is necessary when the glass is broken and cracks are extensive. If something like this happens then the damage should not be ignored.  It is better to replace the windows completely with the new one so that it will be safe in the future.  If the glass is broken it immediately needs a replacement, which cannot be done by self. During the glass replacement make sure that the company is using quality and standard material. The company should only use original equipment manufacturer window.

Replacement includes installation of auto glass which is sturdy, tough and meant for windshields. A damaged windshield makes it difficult to drive the vehicle and can lead to an unfortunate accident. Many people think that glass replacement will be very expensive, so they ignore it. Even some people use some measures which are for a short period of time. As glass is a brittle material it can lead existing cracks to expand easily.  So rather than using glue or gel to fix your problem, it is better to do the glass replacement.

Make sure that you choose a reliable and reputed company. All companies are not reliable. Check that they are experienced and also check the testimonials of the company so that you make sure that you choose the best one.

Glass is a common household object like windows, car windshield, drinking containers, car windows and car headlights. Glass repair Sydney is a viable option that depends on the damage. Glass us a dangerous product. A broken glass can lead to problems like personal injury, security and weather penetration. Glass repair Sydney can repair broken glass very easily.

Cracked or damaged glass is very dangerous. Glass damages at the most inconvenient time. Damaged glass fittings by unprofessional can create unwanted lawsuit and can also damage your brand image. There are some types of glass like toughened or laminated safety glass that are safer to handle. On the other hand, float or annealed glass can be dangerous. Breaking characteristics of non-safety glass products tend to present knife such as shards that are razor sharp that can cut through skin, muscle tissues and tendons easily. Glass repair Sydney carries out this type of repair to prevent from these types of injuries.

Broken glass caused by high impact and it requires a complete removal and installation of a new glass. The main priority of the glass repair Sydney is to keep your property safe and secure. You can be assured that you will get the best glass repair solution no matter at what time of day or night

Glass repair Sydney has provided the best repair and installation solution to the customers. Our unique and proactive glass repair technology allows the customers to get quality and efficient services at very competitive prices. Glass repair Sydney repairs ,glass for apartments, house, shops, offices, and shops including doors, windows, shop fronts, and etc.

HOW CAN YOU CHECK THE ACCURACY OF A MICROMETER?

With a micrometer check set you can check the accuracy of a micrometer and vernier calipers for capacities from 0-25mm up to 200mm capacity.

For reliable and accurate checking a set should conform to requirements of ISO 3611-2010 (AS2012 amended). Ideally a check set should include 50mm, 75mm and 100mm gauges to allow larger capacity.

A micrometer check set can accurately test the length, flatness and parallelism of the measuring faces.

With the addition of optical flats, the ¼ turn parallelism can also be checked.

Check sets ideally should be packed in secure protective cases.

MICROMETER CHECK SET

Tutoring for HSC English Students

Students undertaking English tutoring at Master Coaching can expect high quality service, which is personalised and delivered by coaches that are passionate and genuinely care for the students that are under their mentorship. We understand the transition from Year 11 to Year 12 English can be overwhelming – whether you are undertaking Standard, Advanced or Extension levels – due to the expectations and amount of content involved. English is a subject that requires a level of dedication and effort in ensuring success and at Master Coaching, both parents and students can be ensured that we are here to help!

Upon enrolment, students are asked to undertake an initial assessment, which involves an essay attempt of a stimulus material. This will allow us to generate an idea of their range of abilities and understanding and thus cater for the individualised needs of all students.

Lessons are one hour in duration and are developed per according to the needs and feedbacks of the students. The coaches at Master Coaching are high achieving individuals who have extensive experience and grasp of the necessary requirements and knowledge of the HSC English course that will enable their students to gain a competitive result.

Coaches often deliver their lessons centred around the purpose to strengthening students’ understanding their prescribe and related texts (including contextual ideas and techniques), essay construction and integration, analytical skills. Due to their own personal experience, students can also expect guidance in tackling questions under exam conditions and efficient methods of preparation for their school assessments and HSC papers.

Students are also expected to play an active role during these lessons. Coaching is a collaborative process and students are only able to maximise what they get out of their time at Master Coaching if they are willing to put in the work themselves as well! Whilst the polishing of skills is a progressive refining process, our friendly tutors will be right here helping the students, maximising their personal potential.

CALIPERS AND DIVIDERS ARE NOT ALL THE SAME

Calipers and dividers may look similar but there are many differences between brands. 

To get good quality at a fair price check the following features for wing dividers, spring dividers, and firm joint and spring calipers.

WING DIVIDERS /COMPASS

·         Rugged legs

·         Box type hinge joint

·         Hardened points – to ensure the points will have long wear life because hardened steel is a high performing material.

·         Sizes available should be 6”, 8”, 12”, 18” and 24”

WING DIVIDER

SPRING CALIPERS &DIVIDERS

Rigidity is the key feature achieved by:

·         Strong spring

·         Properly made, large diameter fulcrum nut to stop side movement of legs.

·         Legs of sufficient thickness to enhance rigidity of the tool

·         Smooth finish on points to ensure tool performs correctly.

·         Measuring range of spring tools is the stated leg length range.

·         Size range-3”, 4”, 6”, 8”, 10”, 12”, 18” 24” 36”.

OUTSIDE & INSIDE FIRM JOINT CALIPERS

Rigidity is the key feature achieved by:

·         Securely made hinge joint and well-proportioned legs

·         Smoothly made measuring contacts.

·         Measuring range is much larger than size of leg length.  The outside calipers will measure approximately 25%-30% larger diameter than leg length.

·         Size range are 6”, 8”, 12”, 18”, 24”, 30”, 42” and 60” although larger sizes can be available.

OUTSIDE FIRM JOINT CALIPER

NUMBER AND LETTER PUNCHES FOR METAL WORK

HIGH QUALITY, LOW COST NUMBER AND LETTER PUNCHES Robinson International Pty Ltd supply professional quality number and letter punches. • Made from S55C carbon steel correctly hardened and tempered to hardness HRC 58-62. • Most are available with “tail end tempering”. • Softer hit end means no chance of flying steel chips • All punches are abrasive blast finish which ensures rust resistance. • Packed in strong polypropylene boxes marked with size. • These punches will keep on marking hit after hit! The triangular support design of the marking face of these punches, coupled with expert production eliminates the possibility of the image cutting edge crushing or chipping when cutting hardened metals The “R” photo demonstrates proper support for the cutting edge PUNCH SHOWING SUPPORT OF CUTTING EDGE Available in: STANDARD LETTER AND NUMBER SETS NUMBER PUNCHES REVERSED LETTER AND NUMBER SETS come in 2.5mm, 3mm, 5mm, 6mm & 8mm sizes for applications where reversed markings are required. DOTTED LOW STRESS PUNCHES for use whenever reduced stress markings are required due to metal strength and fracture risk. Sizes: Letter sets 3mm and 6mm Number sets 3mm, 4mm 5mm, 6mm and 8mm DOTTED LOW STRESS NUMBER PUNCH TYPE HOLDER SETS These can be used for marking metal and also date coding paper products for the packaging industry. The set includes the type holder, a hexagonal wrench, 52 letters, (including 2 each A-Z), and 37 Sizes available are 3mm, 5mm and 6mm. Contact www.robinsoninternational.com.au

GAUGES

Various types of gauges are used for accurate measuring and testing. CENTERING GAUGES are specially designed indicators for internal and external centering of jobs on machine tools. • Can be used with machine spindle turning to allow speedy set up. • Can be used vertically or horizontally • Available with metric or inch reading

   
CENTERING GAUGE SET

CENTRE GAUGES Available in Whitworth, UN or metric measurements. Centre gauges are used in machining to check angles of tool bits used to cut screw threads.
 

CENTRE GAUGE

RADIUS GAUGES come in various styles and are used to measure the radius of inner and outer surfaces of an object. • Both external and internal radius on each leaf. Inch radius sizes 1/32-17/64 and 9/32-33/64 Metric radius sizes 0.75mm-5mm and 5.5mm -13mm • Separate leaves for external and internal radii. Sizes: 1mm-7mm; 7.5mm-15mm;15.5mm-25mm • Separate gauges for each radius. Five measuring positions on each gauge. Come in both metric and inch radii.
 
RADIUS GAUGE

SCREW PITCH GAUGES Used to measure the pitch of a thread on a screw or tapped hole. Come in Imperial, UNF/UNC & Metric Combination gauges in Whitworth/Metric and AF/Metric BA and ACME both inch and metric.
 
SCREW PITCH GAUGE

 SCREW CUTTING GAUGES Used for checking tool angles when cutting threads. • Comes in Whitworth, Metric, UN, BA and Acme threads • Made from stainless steel • Satin finish

SCREW CUTTTING GAUGE
SMALL HOLE GAUGE 4pce set 1/8"-1/2" capacity These are used to measure the diameter of a bore by inserting the gauge into the bore and adjusting till light pressure felt. The gauge is then measured with a caliper or micrometer.

SMALL HOLE GAUGE

MORSE TAPER GAUGES Plug & Ring Gauges MT2, MT3, MT4, MT5


MORSE TAPER GAUGES

SURFACE ROUGHNESS GAUGES • The surface roughness gauge set is a reliable and easy way for checking, identifying and specifying the degree of roughness of machined parts. • The set contains thirty steel specimens of six machining methods: flat-lapping, reaming, grinding, horizontal milling, vertical milling and turning. • Each specimen measures 7/8" length x 3/8" width and are calibrated in micro inch and micro meters. • A chart giving metric and imperial equivalents for each surface roughness measurement is included in the set.
 
 SURFACE ROUGHNESS GAUGES

SURFACE GAUGES • Fine ground steel base • Fine adjustment screws • Available 4"/7" and 9"/12" Used to measure the height of objects in metalwork. The pointer acts as a scriber for marking out work pieces.

 
SURFACE GAUGES

MICROMETER CHECK SET The components that the set can check are length, flatness and parallelism of measuring faces. With the addition of optical flats the ¼ turn parallelism can also be checked. • The 6425S MICROMETER CHECK SET can check the accuracy of micrometers from 0-25mm capacity up to 200mm capacity. • It can also be used for checking vernier calipers to the same capacity. • The set is based on the requirements of ISO3611-2010 (AS2102 amended) with the inclusion of 50, 75 and 100 mm gauges to allow larger capacity. All sets are packed in secure, attractive protective cases.
 
 MICROMETER CHECK SET

GO/NOGO SCREW THREAD PLUG AND RING GAUGES Used for checking, calibrating or setting of gauges. SCREW THREAD GAUGES • PLUG GAUGES from 1.6m to 355mm • RING GAUGES from 2.00mm to 285mm Available are gauges made to any tolerance grade in almost every thread type from any country or standard. ALL GAUGES ARE SUPPLIED WITH TRACEABLE CERTIFICATES ACCEPTED UNDER ILAC AND MRA AGREEMENTS • Gauge members are correctly heat treated and stabilised and have uniformly distributed carbides in a matrix of tempered martensite. • Gauge members are size selected to maximum metal condition as this gives longer wear life. • These features are only available from a maker with the highest precision measuring and calibration equipment and with independently assessed very small uncertainty of measurement. PLAIN PLUG GAUGES These are available in steel or with tungsten carbide Go member in sizes starting from 0.5mm upwards.

GO/NO GO SCREW THREAD GAUGES

AEROCUT BROACH ARTICLE

Broaching is a machining process that uses a toothed tool, a broach, to remove material. AEROCUT KEYWAY broaches quickly, easily and economically produce keyways in any sort of job. An important feature of AEROCUT broaches is they are TiN coated at no extra cost. Titanium Nitride (TiN) is applied as a thin coating to harden and protect cutting surfaces. AEROCUT push-type KEYWAY broaches come in imperial and metric sizes and are supplied complete with shims. Imperial (inch) sizes range from 1/16” up to 1” Metric sizes range from 2mm up to 25mm AEROCUT BROACH AND SHIMS Collared or plain bushes are available for all bore sizes. SQUARE BROACHES Imperial (inch) sizes range from 1/8” to 1” Metric sizes range from 4mm to 25mm HEXAGONAL BROACHES Imperial (inch) sizes from 1/8” to 1” Metric sizes from 4mm to 25mm KEYWAY BROACH SETS contain the most common keyway metric or imperial (inch) broaches and a range of bushes packed in varnished wooden boxes. BROACH SET

When do I need coaching and why?

A student when they feel as though they are falling behind or even a student that wants to be accelerated, should think about getting tutoring. At Master coaching it is vital and highly valued that students establish a safe, happy and nurturing environment in which they find they can learn as well as share their knowledge. This sharing formulates as an educational experience in itself as students who struggle to gain ideas, will struggle no more. As information and ideas will be a plenty in a comprehensive style of sharing information.

The inclusive and nourishing environment means that students flourish according to achievement. This achievement of students will benefit from those pupils in which decide to start or engage with tuition early on. This choice would ensure that the student gets the best help needed to further their own education and ultimately achieve their desired ATAR.

Thus private one on one tuition found at Master Coaching means that students will be able gain the help they need. This help is personalised for each student and is such that it is targeted specifically at each individual student, no matter the subject or content. Master Coaching always endeavours to target students weaknesses while also extending those students in which need challenging.

Master Coaching further inherently develops a classroom in which creates an educational platform for learning. This involves students leaving each lesson feeling as though they are empowered and more knowledgeable as each subsequent lesson progresses. Further this knowledgeable learning will not only bring a student up to speed upon the subject in which they are studying but it will also allow for students to be advanced . This concept of acceleration involves students working hard to gain the reward of greater knowledge.

Master Coaching facilities this learning as they ensure the focus is placed on the student through a one on one private session, as to improve both the students knowledge as well as broad ability. This session includes specifically developed material which is beneficial in exposing students to all different learning educational styles. Thus, the ability to challenge students in a safe environment means that they will be able to participate more effectively at school. This effective education means that students gain confidence to participate more in learning.

Therefore, it is extremely important to consider the right time of when coaching is needed and the considerable benefit that stems from early tutoring help.

How to become an effective writer?

During the HSC one thing is common across all papers and subsequent subjects. That common element is writing. Writing in general is the ability for a student to convey ideas or constructs of what they have learnt about in class. Depending on the subject obviously this concept of writing can take a literal or creative path, as both formulate in the same premise as to engage the responder upon the topic the student is discussing. Consequently, Master Coaching takes great care in preparing a student to develop the best pieces of writing they can.

Thus, it is essential for students to become proficient and skilful writers across a multitude of mediums. Though it is not as easy to develop these skills as writing constantly and aimlessly on topics students don’t understand. Rather it is about students becoming effective comprehensive and well-informed writers. Writers in which can not only translate their opinion onto paper but also further engage the audience. This engagement takes place through constructive guidance upon which students can again from Master Coaching. Students who attend lessons at Master Coaching will find that their writing will benefit from a more direct and analytical approach to writing essays.
This approach will be taught across a couple of weeks in a sequential and authentic process of learning. For students to achieve their maximum potential and further develop their writing skills, Master Coaching sets specific tasks to engage as well as further learning. These tasks both set in place the essential structure needed for higher band writing but also allow for an exam like atmosphere to be established during the session. At Master Coaching it is providing an environment for students with which they can excel in and achieve their maximum potential.

Rather then run students through a rigid course Master Coaching engages students to target their problem areas as well as emphasise essential learning. This essential learning forms its basis upon teaching and showing students how to run through paragraphs and essays as to improve their own skills. This essential progress furthers student’s ability to extend their vocabulary as well as structure. Structure in an essay sense forms the mandatory writing sequences in which once again Master Coaching emphasise as well as reinforce the structures.

Overall, Master Coaching allows for students to further gain confidence and proficiency in their writing. This proficiency takes place through a student’s ability to have fluid ideas in which run throughout their piece of writing as well as the inclusion of a great use of language. This comprehensive use of language encompasses a student’s wide range of exposure to all textual mediums. Thus, through attending lessons at Master Coaching students will find that they benefit greatly from a consideration of the texts explored during the sessions. Thus essay writing is an important skill to attain throughout tutoring and through general school. Students therefore gain an ability and confidence to achieve their best in any essay they need to write across any subject or topic.

HOW TO CHOOSE A SELF-CENTERING LATHE CHUCK

A GOOD QUALITY CHUCK CAN ENSURE THAT ALL LATHES WILL PERFORM BETTER. The main requirements for a lathe chuck is to securely and safely hold the job in the lathe, be accurate and maintain accuracy over a long time. Understanding the difference between ultimate cost and immediate price is an important factor in selecting a lathe chuck. A lathe chuck should be selected according to the quality of the important features of GRIP; ACCURACY and WEAR LIFE. High quality of these feature means that the chuck will outlast a low price but low quality chuck many times over meaning much lower ultimate cost. GRIP The better the grip, the safer is the work environment and the faster the job can be done. Several factors affect the grip:

• For self/centering chucks the percentage engagement between the scroll and the jaw teeth
• There should be a minimum of 3 jaw teeth engaged on the scroll at any position of the jaws.

Figure 1 SMALL DIAMETER CHUCK SHOWING PITCHES OF EXPOSED SCROLL TOOTH

• The smoothness of finish on the scroll tooth and the jaw teeth can affect the transmission of force. Ground finish is usually much smoother and more accurate than machined finish.
• The grip faces of the jaws have to be properly designed and accurately made for the intended application.
• The RPM of the chuck dramatically affects the grip force exerted on the job. The body material also determines the maximum safe RPM the chuck can turn. Choices are cast iron, SG iron and steel. The recommended safe RPM for lathe chucks is governed by Standards din 6386.1 and VDI3106. Note as a chuck wears or is not correctly maintained, the maximum recommended grip and RPM lessen.
• A lathe chuck must be properly balanced or the grip and RPM is adversely affected.
• Examine the end float of the jaws against the scroll tooth.

ACCURACY Consider the accuracy the maker claims. Not all chucks have the same run-out accuracy when being operated. Some makes of chucks offer different accuracies for job run-out. A good quality chuck should have a run-out not exceeding 40 microns (0.001”) at any position on the scroll for sizes up to and including 315mm diameter. For 400mm diameter chucks a run-out of .075 microns is permissible. For 500mm or 600mm diameter chucks run-out of 0.10 microns is permissible. If the claimed run-out accuracy is MORE than these values then it is not a precision chuck. WEAR LIFE & FINISH The finish of a chuck will give a good indication of the quality. Look for “ground” finish on the chuck body and a blemish-free surface. The life of a chuck is determined by the selection of correct materials, accuracy of manufacture and finish of the various components and how these components work together. Lathe chucks should be regularly cleaned and re-lubricated using grease for the scroll and pinion and oil for the scroll and jaws. NEVER use graphite or graphite-based grease to lubricate a precision chuck, scroll and pinions. SUMMARY The following should be checked when selecting a lathe chuck

• The overall finish and how the components work together
• The end float of the jaws
• The exposed Scroll (wind out the jaws) to ensure MINIMUM 3 jaw teeth can be engaged at any one time.
• The percentage engagement between the scroll tooth and jaw teeth

Figure 2 END VIEW OF JAW IN CHUCK BODY SHOWING REAR JAW TOOTH AND START OF SCROLL TOOTH

• For up to 315mm size chuck check if the scroll is hardened and ground.
• Does the maker’s catalogue list the materials used in the various components and the HRC of these components?
• Is the chuck balanced?
• Do the grip faces of the jaw appear to be uniformly made?
• Consider the required RPM in order to select the body material.
• Are spare parts available?
• Does the maker specify accuracy?

      ROBINSON INTERNATIONAL PTY LTD www.robinsoninternational.com.au