loading
SUBORUI
| Availability: | |
|---|---|
| Quantity: | |
Manufactured with 8% cobalt-alloyed M42 high-speed steel and premium TiN gold coating, these drill bits are the trusted choice for B2B partners including stainless steel fabricators, automotive component manufacturers, aerospace machining facilities, mold & die workshops, hardware distributors, and global MRO service providers. We deliver unrivaled batch consistency, extended tool life, and reduced total operational cost for high-volume production and continuous drilling applications.
Superior Red Hardness & High-Temperature Stability: Maintains exceptional cutting edge hardness even at extreme temperatures up to 600°C generated during continuous high-speed drilling of hard metals, eliminating edge softening, chipping, and premature wear.
Outstanding Wear & Abrasion Resistance: 8% cobalt alloying significantly boosts material toughness and abrasion resistance, extending service life by 3-5x compared to standard HSS drill bits, and 2x compared to 5% cobalt drill bits in stainless steel applications.
Exceptional Impact Resistance: Optimized metallurgical structure reduces breakage risk in heavy-duty, interrupted cutting operations, minimizing unplanned downtime and tool replacement costs for your production line.
Increases surface hardness to 85+ HRC, further enhancing wear resistance and extending tool lifespan
Reduces friction between the drill bit and workpiece, enabling smoother chip evacuation, lower cutting heat buildup, and faster penetration speeds
Delivers excellent oxidation resistance, making it suitable for both wet and dry high-speed drilling operations
Ultra-tight dimensional tolerance and near-perfect concentricity, eliminating radial runout for straight, round, burr-free holes with zero deviation
Consistent batch-to-batch performance, critical for high-volume automated production lines
Optimized flute geometry for unobstructed chip removal, even during deep-hole drilling in viscous materials like stainless steel
Stainless steel fabrication & kitchenware manufacturing
Automotive & heavy truck component machining
Aerospace & defense parts production
Mold & die manufacturing
Medical device & precision instrument machining
Oil & gas equipment repair & production
Industrial MRO & maintenance operations
Metalworking job shops & contract manufacturing
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 " | |
