HSS Standard Drill 620P GTD
NACHI 620P GTD is the TiN coated Morse taper shank drill in standard length. TiN extends life at a lower price than cobalt; for volume stainless work 6602 COTD is still better, and 650 LTD covers depth.
Specifications (51 items)
| Dia. | Flute length | Overall length | Shank dia. | Depth ratio (×D) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| 7~9.5 | 67~79 | 148~160 | MT1 | 8.32~9.57 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Expand this group (6 specs)
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| 10~14.5 | 85~111 | 166~209 | 1~2 | 7.5~8.5 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Expand this group (10 specs)
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| 15~19.5 | 111~135 | 209~233 | MT2 | 6.84~7.48 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Expand this group (10 specs)
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| 20~24.5 | 135~154 | 233~275 | 2~3 | 6.29~6.83 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Expand this group (10 specs)
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| 25~29.5 | 154~168 | 275~289 | MT3 | 5.69~6.24 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Expand this group (10 specs)
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| 30~32 | 168~177 | 289~298 | MT3 | 5.46~5.64 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Expand this group (5 specs)
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Specification Range
| Diameter | 7~32mm |
|---|---|
| Flute length | 67~177mm |
| Overall length | 148~298mm |
| Shank diameter | MT1~MT3 |
| Depth ratio | 5.46~9.57 |
Product Description
NACHI 620P GTD is the TiN coated Morse taper shank drill in standard length. TiN extends life at a lower price than cobalt; for volume stainless work 6602 COTD is still better, and 650 LTD covers depth. It is made from plain high speed steel with NACHI's G coating, a TiN-based general-purpose layer with excellent adhesion to HSS. Sizes cover diameter 7~32mm, flute length 67~177mm, overall length 148~298mm, 51 in total, made in Japan. How is the taper matched? The Morse number follows the diameter - check the spindle taper before mounting. It suits carbon and alloy steel, stainless steel with workpiece hardness up to HRC30. Typical uses: large-hole drilling in ordinary steel, production work, and longer intervals between regrinds. The family also includes the uncoated 602 TD (diameter 7~100mm, the widest large-hole coverage), the cobalt 6602 COTD (rated to HRC40) and the long-series 650 LTD (overall length 250~625mm).
Workpiece Materials & Hardness
- Steel (P)
- Stainless steel (M)
Max. workpiece hardness HRC30
Related Resources
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