| Customization: | Available |
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| Coating: | Coating |
| Tooth Form: | Straight Tooth |
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Description:
(1) High hardness and wear resistance
(2) Good heat resistance
(3) High strength and good toughness
| New Bit No. | Old Bit No. | D/mm | H/mm | R/mm | L/mm | d/mm |
| 550 127 127 | 550 127 | 12.7 | 12.7 | 2.4 | 46 | 6 |
| 551 127 127 | 551 127 | 12.7 | 12.7 | 2.4 | 46 | 8 |
| 550 090 143 | ------ | 19 | 14.3 | 4 | 46 | 6 |
| 551 190 143 | ------ | 19 | 14.3 | 4 | 46 | 8 |
| New Bit No. | Old Bit No. | D/inch | H/inch | R/inch | L/inch | d/inch |
| 555 127 127 | 555 127 | 1/2 | 1/2 | 3/32 | 1-13/16 | 1/4 |
| 555 190 143 | ------ | 3/4 | 9/16 | 5/32 | 1-13/16 | 1/4 |
| 557 127 127 | 557 127 | 1/2 | 1/2 | 3/32 | 2-1/8 | 1/2 |
| 557 190 143 | ------ | 3/4 | 9/16 | 5/32 | 2-1/8 | 1/2 |
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