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SUBORUI
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Superior Chip Evacuation: Wider, optimized flutes create unobstructed channels for fast, efficient chip removal, preventing clogging even during deep-hole drilling and high-speed continuous operation. This eliminates heat buildup, extends tool life, and ensures consistent hole quality.
Enhanced Stability & Reduced Runout: The dual-lip cutting structure provides balanced radial support, minimizing drill bit wander and radial runout during penetration. This results in perfectly round, straight holes with zero deviation, eliminating the need for secondary finishing work.
Faster Cutting Speeds: The optimized flute angle and cutting edge geometry reduce cutting resistance, allowing for higher drilling speeds without sacrificing precision, significantly boosting production efficiency.
Exceptional red hardness and wear resistance, maintaining cutting edge sharpness even under continuous high-temperature drilling
Superior toughness and impact resistance, reducing breakage risk in heavy-duty, high-stress applications
Optimal balance of performance and cost-effectiveness, perfect for bulk industrial use
Black oxide finish: Enhances corrosion resistance, reduces friction, and improves heat dissipation for general-purpose metal drilling
TiN/TiAlN coating: Boosts surface hardness by 3x+, extends tool life by 2-5x, and enables high-speed dry drilling in hard metals (stainless steel, alloy steel)
Smooth, low-friction surface for smoother penetration and reduced workpiece damage
Bulk Order Support: Large-volume production capacity to meet your wholesale and distribution needs, with competitive factory-direct pricing
Customization Services: OEM/ODM support for custom sizes, coatings, packaging, private labeling, and logo printing to match your brand
Stable Inventory & Fast Delivery: Full stock of standard sizes for immediate shipment, with guaranteed lead times for custom orders
Quality Assurance: Every batch undergoes strict dimensional, hardness, and cutting performance testing, with full test reports and compliance certifications (RoHS, ISO) provided
Dedicated B2B Support: Professional technical team for pre-sales consultation, application guidance, and after-sales service
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 |
| 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" | |
