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| Brand Name: | XRTOOLS |
| Model Number: | 3/8 |
| MOQ: | 500PCS |
| Price: | 0.05-2.7$/PCS |
| Delivery Time: | 30-45days |
| Payment Terms: | T/T, L/C, D/P |
The ANSI Amber & Black M35 Cobalt Drill Bit is a high-performance twist drill designed for precision drilling through tough metals. Constructed from high-speed steel with 5% cobalt (M35 grade), it delivers exceptional hardness, heat resistance, and long-term durability. The amber and black oxide finish provides enhanced lubricity, corrosion protection, and better wear visibility.
This bit features a 135° split point tip for fast, accurate starts without walking, and a three-flat shank that ensures secure grip in drill chucks, eliminating slippage during high-torque applications. Manufactured to ANSI standards, it is ideal for professionals seeking dependable inch-size tooling for industrial and commercial use. Produced by XINGRUI, a trusted global manufacturer of precision cutting tools.
The M35 cobalt drill bit is engineered for tough drilling conditions and is widely used across key American industries:
Stainless Steel Drilling: Ideal for 304/316-grade steel in fabrication, kitchens, pipelines, and medical equipment
Metal Fabrication Shops: For clean hole drilling in steel plates, tubing, aluminum sheets, and angle iron
Automotive Repair & Maintenance: Used to drill through brackets, frames, manifolds, and hardened bolts
HVAC & Plumbing Work: Drills through ductwork, heater jackets, and non-ferrous metal pipes
Electrical Installations: Suitable for punching holes in panels, junction boxes, and conduit boxes
Industrial Equipment Maintenance (MRO): For machinery frames, pumps, and enclosures
Construction Drilling: Use on steel studs, rebar, joists, and mounting hardware
DIY/Home Projects: Ideal for stainless sinks, hardware, lawn tools, and home metal repairs.
Compatible with hand drills, drill presses, mag drills, and CNC equipment. Use cutting oil for optimal performance in stainless steel and hard metals.
Material: M35 high-speed steel with 5% cobalt for maximum heat resistance
Finish: Amber & black oxide – reduces friction, increases durability
Tip Angle: 135° split point – fast starts, no pre-drilling needed
Shank Type: Three-flat shank – prevents slipping in keyed/keyless chucks
Standard: ANSI-compliant inch sizes – consistent length & compatibility
Construction: Fully ground spiral flutes for smooth chip removal & clean holes
| Diameter (inch) | Overall Length | Flute Length | Shank Type |
|---|---|---|---|
| 3/16" | 3-3/8" | 2-1/16" | Three-Flat |
| 7/32" | 3-5/8" | 2-1/4" | Three-Flat |
| 1/4" | 3-5/8" | 2-1/4" | Three-Flat |
| 17/64" | 4" | 2-1/2" | Three-Flat |
| 9/32" | 4-1/4" | 2-11/16" | Three-Flat |
| 5/16" | 4-5/8" | 2-15/16" | Three-Flat |
| 11/32" | 4-3/4" | 3" | Three-Flat |
| 3/8" | 5-1/4" | 3-7/16" | Three-Flat |
| 13/32" | 5-1/2" | 3-3/4" | Three-Flat |
| 7/16" | 5-3/4" | 4" | Three-Flat |
| 15/32" | 6" | 4-1/4" | Three-Flat |
| 1/2" | 6-1/4" | 4-1/2" | Three-Flat |
Additional sizes and reduced shank versions available upon request.
Individual Packaging: Each bit in a labeled plastic tube (amber/black color visible)
Set Packaging: 13-pc or 21-pc inch drill bit sets in metal or blow-molded plastic cases
OEM Options: Custom logo, barcode stickers, blister cards, shrink wrap available
Export Cartons: Foam-padded inner layers for shipping protection
MOQ for Private Labeling: 2,000 pcs
Q1: What is the benefit of the three-flat shank?
It provides a non-slip grip in drill chucks—perfect for high-torque and handheld applications.
Q2: Can this drill stainless steel?
Yes. It’s designed to drill 304, 316, and hardened metals with high heat resistance and accuracy.
Q3: Is this ANSI standard?
Yes, it follows ANSI inch-based standards, making it fully compatible with American drill systems.
Q4: Can I use it in a cordless drill?
Yes. The three-flat shank fits securely in both keyed and keyless chucks.
Q5: Do you provide OEM branding and packaging?
Absolutely. XINGRUI offers full OEM/ODM services including custom packaging and laser logo marking.
