Sharpening with Diamond Grinding Wheels

- on the Tormek water-cooled sharpening system

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1. Knowledge
2. The Tormek Way of Sharpening
3. Sharpening with Diamond Grinding Wheels

Consistent shape and flat bevel

We are happy to offer diamond grinding wheels to our users in three different grades; coarse (360 grit), fine (600 grit) and extra fine (1 200 grit). Diamond is the world&#;s hardest material and functions optimally with our machine&#;s low wheel rotation speed. With the diamond grinding wheels from Tormek you can sharpen all types of materials, including steel, HSS, ceramics and carbide.

• Sharpens all materials.
• Keeps a constant diameter and shape which simplifies jig settings and allows you to sharpen a completely flat bevel on the side of the grinding wheel using the MB-102 Multi Base.
• Apply a low pressure when sharpening - let the diamonds do the work.
• Use less water in the water trough when sharpening with diamond grinding wheels compared to when sharpening with grindstones.
• Always use ACC-150 Anti-Corrosion Concentrate to prevent rust when sharpening using water.
• Lower the water trough when you finish sharpening to let the diamond grinding wheel drain.
• Diamond is the world&#;s hardest material &#; twice as hard as CBN and therefore ideal for sharpening at a low rpm.
• CBN is commonly used when sharpening with a high rotation speed, as diamond would be broken down by the high temperature.
• Thanks to Tormek&#;s low rotation speed, you will never reach temperatures that are harmful to diamond, and diamond grinding wheels can be used to sharpen all types of materials.
• Look to your own needs when deciding which grinding wheel to choose.

This is why we love diamonds

In this video, we get to meet our CEO Håkan who was responsible for the development of our diamond grinding wheels. He explains why Tormek has chosen diamond over other abrasives and answers common questions on the subject.

In addition to the diamond grinding wheels shown in the video we offer another three diamond grinding wheels; DC-200 Diamond Wheel Coarse, DF-200 Diamond Weel Fine and DE-200 Diamond Wheel Extra Fine. They fit the Tormek T-4 and older machine models with a grinding wheel 200 mm (7 7/8&#;) in diameter.

The Structure of the Diamond Grinding Wheels

Tormek&#;s Diamond Wheels are constructed with a precision machined steel frame. The frame is coated with a single layer of diamond grit that is electrolytically anchored with nickel.

The Tormek Diamond Wheels also have a layer of diamond on the side, which enables sharpening on the side of the grinding wheel with the MB-102 Multi Base for a fully flat bevel.

Use a lower sharpening pressure

New diamond wheels are sensitive to high pressure since the grits are very sharp. Therefore, sharpen with a very low pressure in the beginning. You'll notice that the diamond grinding wheel seems quite aggressive the first few sharpenings, and gives a coarser surface.

After a short break-in period, the diamond crystals will stabilize to a uniform level to give a finer surface. When sharpening with diamond, always use a lower sharpening pressure than when you sharpen with grindstones. If you are unsure, begin with a lower sharpening pressure and gradually increase.

Diamond and CBN &#; what's the difference?

Synthetic diamond is ideal for tool grinding and is used in the manufacturing of whetstones when highest performance is prioritized. CBN, or Cubic Boron Nitride, is classified as the world&#;s second hardest material according to the Knoop scale. The diamond grits are harder and maintain the cutting properties better compared to CBN, which means that sharpening with diamond is faster.

CBN is better suited when sharpening with a traditional bench grinder. The high speed generates heat, which would break down the diamond grits. With the Tormek method, where you sharpen at a low speed (90-100 rpm), we can offer the possibility to sharpen with the world's hardest material, diamond, since no harmful heat is generated. Sharpening with a low rotating speed is always beneficial, since your tools don't risk overheating either.

The diagram shows different types of material and their hardness according to the Knoop scale.

The diagram shows how the diamond&#;s hardness decreases at high temperature.

The Tormek Way of Sharpening

Professional sharpening of all edge tools

How to Sharpen Your Tools

For professional crafts, hobby or culinary use

New Possibilities With Diamond Grinding Wheels

The diamond &#;s characteristics provide a high and constant abrasive power and a wheel that always has a full-size diameter which remains flat. It can be of great use if you often sharpen the same tool, as it simplifies both the setting and grinding. Our Diamond Wheels also have a diamond layer on the outside, which allows for a completely flat grinding surface with the MB-102 Multi Base.

You can alternate between sharpening with a grindstone and a diamond wheel on the same machine. The particles from the grinding wheels sink to the bottom due to their weight, which means you cannot damage your diamond wheel if there are stone particles in the water trough and vice versa.

How Long Will a Diamond Grinding Wheel Last?

The life span of a diamond wheel is affected by several external factors, e.g. how often you sharpen, sharpening pressure and if you shape your tools often. This means that we cannot give our diamond wheels an exact life span, but we know several professionals who have used our diamond wheels in their workshop for over a year, without noticeable wear. Compared to CBN, diamond wheels have a longer life span. This is because diamond is clearly harder and resistant to abrasion for much longer.

Contact us to discuss your requirements of Diamond Grinding Shoes Wholesale. Our experienced sales team can help you identify the options that best suit your needs.

How you maintain your Tormek Diamond Wheel also affects the life span. We recommend to always sharpen with water, since it prolongs the life of the diamond wheel. When sharpening with water, always use ACC-150 Anti-Corrosion Concentrate to prevent rust on your grinding wheel.

ACC-150 Anti-Corrosion Concentrate for Rust Prevention

We recommend to always use water when sharpening with Tormek&#;s Diamond Wheels, as water cooled sharpening prolongs the life of the wheel and provides a finer surface. It is also possible to sharpen without water.

When the diamond layer is touched by the swarf from your tool, pores will be created in the nickel coating, exposing the steel core. Therefore, always use the ACC-150 Anti-Corrosion Concentrate in the water when sharpening with water to prevent rust on the grinding wheel. Add 10 ml of concentrate to 250 ml water (~4%). Every diamond grinding wheel comes with a 150 ml bottle of anti-corrosion concentrate.

If you want to save the mix overnight, remember to lower the water trough to prevent discoloration on the diamond wheel. As long as there is water in the water trough, the concentrate retains its characteristics.

Please note that ACC-150 does not contain any fungicide, so be aware that no biological particles are left in the water trough if you want to save your mix. It is also good to let the diamond wheel drain after use.

Diamond Grinding Wheels

Exceptional wear resistance and constant shape

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MB-102 Multi Base

Get a flat bevel, or convert horizontal mounts to vertical

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ACC-150 Anti-Corrosion Concentrate

Protects diamond grinding wheels against rust

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Last reviewed by the Product Safety Team in December of .

GOING, GOING, GONE!

We are often asked the question, "When is a grinding wheel worn out?" The answer depends on the grinding wheel and the application. Listed below are some of the most common types of grinding wheels and the answer to this question.

Type 1 (Straight Wheels)

ANSI B7.1 states, &#;The usable portion of an abrasive wheel shall be considered to be that portion which extends beyond the mounting flanges. A wheel shall not be worn down to a size which would allow the mounting flange assembly to contact the work piece or work piece holding fixture." This rule assumes that the proper flanges are used and the correct machine guarding is in place. WARNING: Do not grind with the fine center or core of any wheel. These are not designed for grinding. These centers may also contain steel rings, which can damage the grinding machine if contacted.

Type 2 or Cylinder Wheels and Segments

The machine will determine the discard size i.e. the down-feed mechanism will keep the wheel from contacting the workpiece. WARNING: Always use proper mounting procedures when using this type of product. Do not loosen the mount and lower the wheel or segment below the machine&#;s designed clamping mechanism, i.e. clamping mechanism must have complete contact with wheel or segment. This is a significant cause of wheel/segment breakage.

Type 5 & 7 (Recessed Wheels)

Wheels that have recesses CANNOT be worn down to their mounting flanges because the edge of the recess will &#;spall&#; away. For Types 5 & 7 recessed wheels, factors such as wheel grit size, application and experience will provide the user with the best answer. If you do not know, discard the wheel when you are 1&#; away from the recess.

Type 6 & 11 (Portable Cup Wheels)

Portable cup wheels must be discarded when the machine&#;s guard prevents proper grinding. In this case, a proper guard will determine discard size by preventing additional grinding on the wheel&#;s rim. WARNING: Never remove a worn cup wheel from its suitable grinder and use it on an inline grinder or any other machine. Never grind on the outer periphery of a cup wheel!

Type 6 & 11 (Cup Wheels for Precision Applications i.e. Fixed Based Machines)

On fixed-based machines with non-portable cup wheels, never allow contact with the back of the cup wheel or allow the mounting flange assembly to contact the workpiece holding fixture. WARNING: Maintain a safe distance to prevent accidental contact with the back of the cup or the mounting flange during grinding.

Type 27, 29 or Raised Hub Wheels

As with portable cup wheels, the proper guard for Type 27, 28 or raised hub wheels will often determine the wheel discard size. If the application allows the wheel to be worn to a stub, stop grinding before contacting the mounting flanges and do not use the wheel&#;s hub to grind.

Type 16, 17, 18, 19 and 52 (Cones, Plugs, Mounted Points, and Mounted Wheels)

These products usually don&#;t require guards and aren&#;t mounted between flanges, which allow users to gauge usage duration. To avoid spindle contact during grinding, monitor product wear, spindle dimensions, and grit size. Discard the product when it is 3/16 inches from the spindle diameter for 36-grit and coarser products and 1/8 inch for 46-grit and finer products.
 

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