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About Tool Steel
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Hardened High-Speed M42 Tool Steel
- Yield Strength: Not Rated
- Hardness: Rockwell C65 (Very Hard)
Also known as cobalt steel, this M42 tool steel maintains its hardness in high-speed cutting applications that generate intense heat. Use it to make tools for cutting extremely hard materials.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Lg. | Mechanical Finish | Each | |
| 1/64" | -0.0002" to 0" | 1 1/2" | Precision Ground | 0000000 | 00000 |
| 1/32" | -0.0002" to 0" | 1 1/2" | Precision Ground | 0000000 | 0000 |
| 3/64" | -0.0002" to 0" | 1 3/4" | Precision Ground | 0000000 | 0000 |
| 1/16" | -0.0002" to 0" | 1 7/8" | Precision Ground | 0000000 | 0000 |
| 5/64" | -0.0002" to 0" | 2" | Precision Ground | 0000000 | 0000 |
| 3/32" | -0.0002" to 0" | 2 1/4" | Precision Ground | 0000000 | 0000 |
| 7/64" | -0.0002" to 0" | 2 3/4" | Precision Ground | 0000000 | 0000 |
| 1/8" | -0.0002" to 0" | 2 3/4" | Precision Ground | 0000000 | 0000 |
| 9/64" | -0.0002" to 0" | 3" | Precision Ground | 0000000 | 0000 |
| 5/32" | -0.0002" to 0" | 3 1/4" | Precision Ground | 0000000 | 0000 |
| 11/64" | -0.0002" to 0" | 3 1/4" | Precision Ground | 0000000 | 0000 |
| 3/16" | -0.0002" to 0" | 3 1/2" | Precision Ground | 0000000 | 0000 |
| 13/64" | -0.0002" to 0" | 3 5/8" | Precision Ground | 0000000 | 0000 |
| 7/32" | -0.0002" to 0" | 3 3/4" | Precision Ground | 0000000 | 0000 |
| 15/64" | -0.0002" to 0" | 3 7/8" | Precision Ground | 0000000 | 0000 |
| 1/4" | -0.0002" to 0" | 4" | Precision Ground | 0000000 | 0000 |
| 17/64" | -0.0002" to 0" | 4 1/8" | Precision Ground | 0000000 | 0000 |
| 9/32" | -0.0002" to 0" | 4 1/4" | Precision Ground | 0000000 | 00000 |
| 19/64" | -0.0002" to 0" | 4 3/8" | Precision Ground | 0000000 | 00000 |
| 5/16" | -0.0002" to 0" | 4 1/2" | Precision Ground | 0000000 | 00000 |
| 21/64" | -0.0002" to 0" | 4 5/8" | Precision Ground | 0000000 | 00000 |
| 11/32" | -0.0002" to 0" | 4 3/4" | Precision Ground | 0000000 | 00000 |
| 23/64" | -0.0002" to 0" | 4 7/8" | Precision Ground | 0000000 | 00000 |
| 3/8" | -0.0002" to 0" | 5" | Precision Ground | 0000000 | 00000 |
| 25/64" | -0.0002" to 0" | 5 1/8" | Precision Ground | 0000000 | 00000 |
| 13/32" | -0.0002" to 0" | 5 1/4" | Precision Ground | 0000000 | 00000 |
| 27/64" | -0.0002" to 0" | 5 3/8" | Precision Ground | 0000000 | 00000 |
| 7/16" | -0.0002" to 0" | 5 1/2" | Precision Ground | 0000000 | 00000 |
| 29/64" | -0.0002" to 0" | 5 5/8" | Precision Ground | 0000000 | 00000 |
| 15/32" | -0.0002" to 0" | 5 3/4" | Precision Ground | 0000000 | 00000 |
| 31/64" | -0.0002" to 0" | 5 7/8" | Precision Ground | 0000000 | 00000 |
| 1/2" | -0.0002" to 0" | 6" | Precision Ground | 0000000 | 00000 |
Grind-Your-Own Lathe Tool Blanks
Grind these hardened steel blanks to the size and shape you need.
M42 high-speed steel has excellent heat resistance for use on stainless steel and nickel.
Square Shank
Square Shank
Shank | M42 High-Speed Steel | |||||
|---|---|---|---|---|---|---|
| Wd. | Ht. | Overall Lg. | End Shape | Bevel Angle | Each | |
| 1/8" | 1/8" | 2 1/2" | Beveled | 10° | 0000000 | 000000 |
| 3/16" | 3/16" | 2 1/2" | Beveled | 10° | 000000 | 0000 |
| 1/4" | 1/4" | 2 1/2" | Beveled | 10° | 000000 | 00000 |
| 5/16" | 5/16" | 2 1/2" | Beveled | 10° | 000000 | 00000 |
| 3/8" | 3/8" | 3" | Beveled | 10° | 000000 | 00000 |
| 7/16" | 7/16" | 3 1/2" | Beveled | 10° | 000000 | 00000 |
| 1/2" | 1/2" | 4" | Beveled | 10° | 000000 | 00000 |
| 5/8" | 5/8" | 4 1/2" | Beveled | 10° | 000000 | 00000 |
| 3/4" | 3/4" | 5" | Beveled | 10° | 000000 | 00000 |
| 7/8" | 7/8" | 6" | Beveled | 10° | 000000 | 000000 |
| 1" | 1" | 7" | Beveled | 10° | 0000000 | 000000 |