SUBORUI
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Our drill bits are made of Industry grade M35 High Speed Steel, containing 5% cobalt, All grinding drill bit, smooth surface, high grinding precision,
sharp edge, durable
135° standard industrial double rear edge Angle, self-centering to prevent walk-off and faster chip .Double spiral cutting slot design, large capacity
cutting space, good cutting performance, improve drilling efficiency.
| Application | ||||||
| HSS Grade | Iron | Aluminum | Carbon Steel | Tile | Plastic | Stainless Steel |
| 4241 | YES | YES | NO | NO | YES | NO |
| 4341 | YES | YES | YES | NO | YES | YES |
| 6542(M2) | YES | YES | YES | NO | YES | GOOD |
| M35 (Co 5%) | YES | YES | YES | NO | YES | VERY GOOD |
| DESCRIPTION OF HSS | C | W | Mo | Cr | V | Co | Si | Mn | P | S |
| % | % | % | % | % | % | % | % | % | % | |
| W4Mo3Cr4V(4341) | 0.88-0.98 | 3.5-4.5 | 2.5-3.5 | 3.8-4.4 | 1.2-1.8 | 0.5-1.2 | 0.2-0.4 | <=0.03 | <=0.03 | |
| W6Mo5Cr4V2(M2) | 0.8-0.9 | 5.5-6.75 | 4.5-5.5 | 3.8-4.4 | 1.75-2.2 | - | 0.2-0.4 | 0.2-0.4 | <=0.03 | <=0.03 |
| W6Mo5Cr4V2Co5(M35) | 0.9-0.95 | 5.5-6.5 | 4.5-5.5 | 3.8-4.4 | 1.75-2.2 | 4.5-5.5 | 0.2-0.4 | 0.2-0.4 | <=0.03 | <=0.03 |
| W2Mo9Cr4V2Co8(M42) | 1.05-1.15 | 1.15-1.85 | 9.0-10.0 | 3.5-4.25 | 0.95-1.25 | 7.75-8.75 | 0.15-0.65 | 0.15-0.4 | <=0.02 | <=0.025 |
Metric size
| DIA.(mm) | OVERALL LENGTH(mm) | WORKING LENGTH(mm) |
| 1 | 34 | 12 |
| 1.5 | 43 | 20 |
| 2 | 49 | 24 |
| 2.5 | 57 | 30 |
| 3 | 61 | 33 |
| 3.5 | 70 | 39 |
| 4 | 75 | 43 |
| 4.5 | 80 | 47 |
| 5 | 86 | 52 |
| 5.5 | 93 | 57 |
| 6 | 93 | 57 |
| 6.5 | 101 | 63 |
| 7 | 109 | 69 |
| 7.5 | 109 | 69 |
| 8 | 117 | 75 |
| 8.5 | 117 | 75 |
| 9 | 125 | 81 |
| 9.5 | 125 | 81 |
| 10 | 133 | 87 |
| 10.5 | 133 | 87 |
| 11 | 142 | 94 |
| 11.5 | 142 | 94 |
| 12 | 151 | 101 |
| 12.5 | 151 | 101 |
| 13 | 151 | 101 |
| 13.5 | 160 | 108 |
| 14 | 160 | 108 |
| 14.5 | 169 | 114 |
| 15 | 169 | 114 |
| 15.5 | 178 | 120 |
| 16 | 178 | 120 |
| 16.5 | 184 | 125 |
| 17 | 184 | 125 |
| 17.5 | 191 | 130 |
| 18 | 191 | 130 |
| 18.5 | 198 | 135 |
| 19 | 198 | 135 |
| 19.5 | 205 | 140 |
| 20 | 205 | 140 |
Imperial size
| DIA. | OVERALL LENGTH (INCH) | WORKING LENGTH (INCH) | DIA. | OVERALL | WORKING LENGTH (INCH) |  DIA. | OVERALL | WORKING LENGTH (INCH) | |
| 1/64" | 3/4" | 3/16" | 15# | 3-3/8" | 2-3/16" | 61# | 1-/5/8" | 11/16" | |
| 1/32" | 1-3/8" | 1/2" | 16# | 3-3/8" | 2-3/16" | 62# | 1-1/2" | 5/8" | |
| 3/64" | 1-3/4" | 3/4" | 17# | 3-3/8" | 2-3/16" | 63# | 1-1/2" | 5/8" | |
| 1/16" | 1-7/8" | 7/8" | 18# | 3-1/4" | 2-1/8" | 64# | 1-1/2" | 5/8" | |
| 5/64" | 2" | 1" | 19# | 3-1/4" | 2-1/8" | 65# | 1-1/2" | 5/8" | |
| 3/32" | 2-1/4" | 1-1/4" | 20# | 3-1/4" | 2-1/8" | 66# | 1-3/8" | 1/2" | |
| 7/64" | 2-5/8" | 1-1/2" | 21# | 3-1/4" | 2-1/8" | 67# | 1-3/8" | 1/2" | |
| 1/8" | 2-3/4" | 1-5/8" | 22# | 3-1/8" | 2" | 68# | 1-3/8" | 1/2" | |
| 9/64" | 2-7/8" | 1-3/4" | 23# | 3-1/8" | 2” | 69# | 1-3/8" | 1/2" | |
| 5/32" | 3-1/8" | 2" | 24# | 3-1/8" | 2" | 70# | 1-1/4" | 3/8" | |
| 11/64" | 3-1/4" | 2-1/8" | 25# | 3" | 1-7/8” | 71# | 1-1/4" | 3/8" | |
| 3/16" | 3-1/2" | 2-5/16" | 26# | 3" | 1-7/8" | 72# | 1-1/8" | 5/16" | |
| 13/64" | 3-5/8" | 2-7/16" | 27# | 3” | 1-7/8" | 73# | 1-1/8" | 5/16" | |
| 7/32" | 3-3/4" | 2-1/2" | 28# | 2-7/8" | 1-3/4" | 74# | 1" | 1/4" | |
| 15/64" | 3-7/8" | 2-5/8" | 29# | 2-7/8" | 1-3/4" | 75# | 1" | 1/4" | |
| 1/4" | 4" | 2-3/4" | 30# | 2-3/4" | 1-5/8" | 76# | 7/8" | 3/16" | |
| 17/64" | 4-1/8" | 2-7/8" | 31# | 2-3/4" | 1-5/8" | 77# | 7/8" | 3/16" | |
| 9/32" | 4-1/4" | 2-15/16" | 32# | 2-3/4" | 1-5/8" | 78# | 7/8" | 3/16" | |
| 19/64" | 4-3/8" | 3-1/16" | 33# | 2-5/8" | 1-1/2" | 79# | 3/4" | 1/8" | |
| 5/16" | 4-1/2" | 3-3/16" | 34# | 2-5/8" | 1-1/2" | 80# | 3/4" | 1/8" | |
| 21/64" | 4-5/8" | 3-5/16" | 35# | 2-5/8" | 1-1/2" | A | 3-/7/8" | 2-5/8" | |
| 11/32" | 4-3/4" | 3-7/16" | 36# | 2-1/2" | 1-7/16" | B | 4" | 2-3/4" | |
| 23/64" | 4-7/8" | 3-1/2" | 37# | 2-1/2" | 1-7/16" | C | 4" | 2-3/4" | |
| 3/8" | 5" | 3-5/8" | 38# | 2-1/2" | 1-7/16" | D | 4" | 2-3/4" | |
| 25/64" | 5-1/8" | 3-3/4" | 39# | 2-3/8" | 1-3/8” | E | 4" | 2-3/4" | |
| 13/32" | 5-1/4" | 3-7/8" | 40# | 2-3/8" | 1-3/8" | F | 4-/1/8" | 2-7/8" | |
| 27/64" | 5-3/8" | 3-15/16" | 41# | 2-3/8" | 1-3/8" | G | 4-/1/8" | 2-7/8" | |
| 7/16" | 5-1/2" | 4-1/16" | 42# | 2-1/4" | 1-1/4" | H | 4-/1/8" | 2-7/8" | |
| 29/64" | 5-5/8" | 4-3/16" | 43# | 2-1/4" | 1-1/4" | I | 4-1/8” | 2-7/8" | |
| 15/32" | 5-3/4" | 4-5/16" | 44# | 2-1/8" | 1-1/8" | J | 4-/1/8" | 2-7/8" | |
| 31/64" | 5-7/8" | 4-3/8" | 45# | 2-1/8" | 1-1/8" | K | 4-/1/4" | 2-15/16" | |
| 1/2" | 6" | 4-1/2" | 46# | 2-1/8" | 1-1/8" | L | 4-/1/4" | 2-15/16" | |
| 1# | 3-7/8" | 2-5/8" | 47# | 2" | 1" | M | 4-3/8" | 3-1/16" | |
| 2# | 3-7/8" | 2-5/8" | 48# | 2" | 1" | N | 4-3/8" | 3-1/16" | |
| 3# | 3-3/4" | 2-1/2" | 49# | 2" | 1" | O | 4-1/2" | 3-3/16" | |
| 4# | 3-3/4" | 2-1/2" | 50# | 2" | 1" | P | 4-5/8" | 3-5/16" | |
| 5# | 3-3/4" | 2-1/2" | 51# | 2" | 1" | Q | 4-3/4" | 3-7/16" | |
| 6# | 3-3/4" | 2-1/2" | 52# | 1-7/8" | 7/8" | R | 4-3/4" | 3-7/16" | |
| 7# | 3-5/8" | 2-7/16" | 53# | 1-7/8" | 7/8" | S | 4-7/8" | 3-1/2" | |
| 8# | 3-5/8" | 2-7/16" | 54# | 1-7/8" | 7/8" | T | 4-7/8" | 3-1/2" | |
| 9# | 3-5/8" | 2-7/16" | 55# | 1-7/8" | 7/8" | U | 5" | 3-5/8" | |
| 10# | 3-5/8" | 2-7/16" | 56# | 1-3/4" | 3/4" | V | 5" | 3-5/8" | |
| 11# | 3-1/2" | 2-5/16" | 57# | 1-3/4" | 3/4" | W | 5-1/8" | 3-3/4" | |
| 12# | 3-1/2" | 2-5/16" | 58# | 1-5/8" | 11/16" | X | 5-1/8" | 3-3/4" | |
| 13# | 3-1/2" | 2-5/16" | 59# | 1-5/8" | 11/16" | Y | 5-1/4" | 3-7/8" | |
| 14# | 3-3/8" | 2-3/16" | 60# | 1-5/8" | 11/16" | Z | 5-1/4" | 3-7/8 " | |
