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QUALITIES
PROPERTIES
PRODUCT
RANGE |
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home : high
speed tool bits : properties
 RELATIVE
PROPERTIES OF MAGICUT
GRADES
RECOMMENDED
TOOL GEOMETRY
TOOL
CLAMPING
RELATIVE PROPERTIES OF MAGICUT GRADES
Depending on the nature of cutting operation like ease of cutting, hardness
of job, machinebility of the job, speed of cutting and heat generated
at the cutting action the right grade of tool is to be selected. The
relative hot hardness, wear resistance and toughness of various grades
are indicated in the chart to serve as a general guide.
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CORRECT
GRINDING
CORRECT
FORM
CORRECT GRINDING
The heat generated while grinding the cutting edges reduces
the hardness at the cutting edges, thereby lowering the cutting efficiency
of a sharpened tool. Therefore, when grinding tool bits:
- Use a soft wheel, appropriately
dressed.
- Apply light pressure and constantly rotate the tool bit surface to
avoid discolouration or burning of the cutting edge.
- Avoid sudden change of temperature DO NOT dip the hot tool in cold
water (otherwise the tool will develop surface cracks, which reduce
the tool efficiency and life).
- Hand stoning of the finish ground faces lengthens
life between regrinds and enhances surface finish achieved with finishing
cuts.
CORRECT FORM
To get high cutting efficiency it is vital that correct tool geometry
(profile) is maintained when regrinding the tool. Correct grinding of
various angles of a tool can greatly improve the tool bit's performance.
Please refer to the 
chart for details of correct angles for cutting different materials.
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