Cratex rubber-bonded abrasives are used in widely diversified list of industries, on production and assembly lines, in finishing operations, in tool and machine shops in production of basic tools, instruments, components parts and for maintenance and repairs.
Each Cratex size and shape is make in four standard grit textures or compositions which differ in accordance with the mesh size of the abrasive grain used:
- C - course (green)
- F - fine (reddish brown)
- M - medium (dark brown)
- XF - extra fine (grey green)
Cratex standard bond
The Cratex bond common to each of the four grit textures is made with premium grade oil-resistant chemical rubber. In contrast to conventional grinding wheels the Cratex bond has unique cushioned action; cuts freely, smoothly and softly without gouging or digging into the work surface. It resists clogging or smearing, and is ideal for a broad range of applications where metallic or non metallic surfaces must be smoothed and polished without loss of dimensional tolerances or control.
Cratex hard bond
The Cratex hard bond increases the cutting action when compared to the Cratex standard bond is is designed for use only in specialization applications. The hard bond removes burrs on hard metals like stainless steel and can also be used for light grinding on applications where light metal removal is essential. All Cratex flexible abrasive finishers, in each of the four grit textures are available in hard bong. Hard bond is not available in kits and minimum quantities are required.
Cratex abrasive type
The abrasive type used in Cratex rubberized abrasives is premium-quality silicon carbide that has been washed, dried and treated to remove impurities and then carefully screen to U.S.department of commerce standards for size. Although silicon carbide is more expensive than other abrasive materials, it is used because it has a high level of purity and has been found to be best for the broadest range of light deburring, smoothing, cleaning and polishing applications on ferrous and non-ferrous alloys as well as many non-metallics, such as glass.
Shapes and sizes
The Cratex small wheels, large wheels, points, cones, blocks and sticks listed in this catalog are all available as standard products. The occasional need for non-catalog shapes or compositions can usually be solved by adapting or modifying standard shapes and compositions to meet special requirements. Several wheels can be mounted in series for added width. the abrasive action of the wheels can be softened by using lower operating speeds and lighter work pressures. Cratex rubber bonded abrasives can also be dressed or shaped to special contours using conventional abrasive wheel dressing tools and methods. Contact a customer services representative for further information.
All Cratex rubberized abrasives are made and safely inspected to the requirements of American National Standards Institute (ANSI) publication, B7.1 safety requirements for the use, care and protection of abrasive wheels. This publication should be made available to all operators of Cratex products. Copies of this publication are available from:
Grinding Wheel Institute
30200 Detroit Road
Cleveland, OH 44145
American National Standards Institute
New York, NY 10018