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Material Material |
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System of Measurement System of Measurement |
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Diameter Diameter |
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Length Length |
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Shape Shape |
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 | Rod and Disc |
Hardness Hardness |
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Hardness Rating Hardness Rating |
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Heat Treatment Heat Treatment |
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Mechanical Finish Mechanical Finish |
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Tolerance Rating Tolerance Rating |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Certificate Certificate |
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Minimum Temperature Minimum Temperature |
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Maximum Temperature Maximum Temperature |
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Shank Type Shank Type |
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 | Square |
Elongation Elongation |
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Yield Strength Yield Strength |
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Appearance Appearance |
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 | Plain |
For Use On For Use On |
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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.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
| 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 | 00000 |
| 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.
For technical drawings and 3-D models, click on a part number.
Square Shank
Square Shank
Shank | M42 High-Speed Steel | |||||
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| 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 | 00000 |
| 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 |