ZHANGJIAGANG FLAME MACHINERY CO.,LTD.
| Point angle | 135° degrees |
| Payment Terms | T/T, L/C, D/P |
| Supply Ability | 400,0000Pcs Per Mouth |
| Delivery Time | 30-45days |
| Packaging Details | Plastic box,Double Blister card |
| Material | HSS-M42 |
| Name | high speed drill bits |
| Shank | Straight Shank |
| Process | Fully Ground |
| Type | Twist Drill Bit |
| Surface | TIN coated |
| Use | hard plastic / cast iron |
| Hardness | HRC65-67 |
| Oem | Available |
| Application | Aluminum,Stainless Steel,copper,Carbon Steel,Cast Iron |
| Size | 3/8 |
| Brand Name | XRTOOLS |
| Model Number | 3/8 |
| Certification | ISO9000 |
| Place of Origin | JIANG SU |
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Product Specification
| Point angle | 135° degrees | Payment Terms | T/T, L/C, D/P |
| Supply Ability | 400,0000Pcs Per Mouth | Delivery Time | 30-45days |
| Packaging Details | Plastic box,Double Blister card | Material | HSS-M42 |
| Name | high speed drill bits | Shank | Straight Shank |
| Process | Fully Ground | Type | Twist Drill Bit |
| Surface | TIN coated | Use | hard plastic / cast iron |
| Hardness | HRC65-67 | Oem | Available |
| Application | Aluminum,Stainless Steel,copper,Carbon Steel,Cast Iron | Size | 3/8 |
| Brand Name | XRTOOLS | Model Number | 3/8 |
| Certification | ISO9000 | Place of Origin | JIANG SU |
| High Light | M42 cobalt drill bit set ，Stainless Steel cobalt drill bit set ，plastic hss jobber drill bit | ||
M42 Cobalt Drill Bit for Stainless Steel – TiN Coated Jobber Length, 135° Split Point
Product Overview
The M42 8% cobalt high-speed steel jobber drill bit is designed for drilling the hardest materials, including stainless steel, hardened alloys, and cast iron. With superior red hardness, a titanium nitride (TiN) gold coating, and a 135° split point, this drill bit ensures precision, durability, and extended tool life. Manufactured by XINGRUI, it is the professional choice for industrial metal drilling applications.
Stainless Steel: Austenitic and duplex grades
Hardened Steels: Tool steels, spring steels, heat-treated components
Cast Iron & Alloy Steel: Excellent for high-strength and abrasive metals
Non-Ferrous Metals: Titanium alloys, brass, bronze, nickel alloys
Industrial Fabrication: Automotive, aerospace, heavy machinery, metal workshops
⚠️ Not intended for wood or soft plastics.
M42 HSS with 8% cobalt: Exceptional hardness and heat resistance
TiN coating: Reduces friction, increases wear resistance, and extends tool life
135° split point: Fast penetration, self-centering, reduced walking
Jobber length: Ideal balance of reach and rigidity
Straight shank: Fits standard keyed and keyless chucks
Fully ground finish: Ensures sharp cutting edges and accurate sizing
| Size (inch) | Decimal (in.) | Overall Length (mm) | Flute Length (mm) |
|---|---|---|---|
| 1/16 | 0.0625 | 50 | 18 |
| 5/64 | 0.0781 | 55 | 24 |
| 3/32 | 0.0938 | 60 | 28 |
| 7/64 | 0.1094 | 65 | 33 |
| 1/8 | 0.1250 | 70 | 36 |
| 9/64 | 0.1406 | 75 | 40 |
| 5/32 | 0.1562 | 80 | 43 |
| 11/64 | 0.1719 | 85 | 47 |
| 3/16 | 0.1875 | 90 | 52 |
| 13/64 | 0.2031 | 93 | 55 |
| 7/32 | 0.2188 | 96 | 57 |
| 15/64 | 0.2344 | 100 | 60 |
| 1/4 | 0.2500 | 102 | 65 |
| 17/64 | 0.2656 | 107 | 70 |
| 9/32 | 0.2812 | 112 | 74 |
| 19/64 | 0.2969 | 116 | 77 |
| 5/16 | 0.3125 | 119 | 80 |
| 21/64 | 0.3281 | 123 | 84 |
| 11/32 | 0.3438 | 127 | 87 |
| 23/64 | 0.3594 | 131 | 90 |
| 3/8 | 0.3750 | 135 | 94 |
| 25/64 | 0.3906 | 138 | 97 |
| 13/32 | 0.4062 | 142 | 100 |
| 27/64 | 0.4219 | 146 | 103 |
| 7/16 | 0.4375 | 150 | 106 |
| 29/64 | 0.4531 | 152 | 109 |
| 15/32 | 0.4688 | 154 | 112 |
| 31/64 | 0.4844 | 156 | 114 |
| 1/2 | 0.5000 | 160 | 118 |
Metric sizes 1.0–13.0mm (0.5mm increments) also available.
Single Pack: Individual PVC tubes or polybags
Bulk Pack: 10 or 20 pcs per plastic tube or box
Retail Pack: Blister cards, color boxes, or labeled cases
Set Options: 13, 19, and 29-piece jobber drill sets in metal or plastic cases
OEM/ODM: Custom branding, logo laser engraving, and private-label packaging
Q2: What is the benefit of TiN coating?
It reduces heat, lowers friction, and provides up to 3× longer tool life.
Q3: How does M42 compare to M35?
M42 contains 8% cobalt, making it harder and more heat-resistant than M35 (5% cobalt).
Q4: What chuck types are compatible?
It fits standard keyed and keyless drill chucks with straight shank design.
Company Details
Business Type:
Manufacturer,Exporter,Trading Company
Year Established:
2018
Total Annual:
500-600
Employee Number:
135~150
Ecer Certification：
Verified Supplier
Jiangsu Xing Rui Precision Tools Co., Ltd. is a leading manufacturer of high-quality cutting tools in China, established in 2008 and located in Danyang, Jiangsu Province—a major hub for cutting tool production with convenient transportation for global logistics. Main Products We speciali... Jiangsu Xing Rui Precision Tools Co., Ltd. is a leading manufacturer of high-quality cutting tools in China, established in 2008 and located in Danyang, Jiangsu Province—a major hub for cutting tool production with convenient transportation for global logistics. Main Products We speciali...
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