ZHANGJIAGANG FLAME MACHINERY CO.,LTD.
| Product name | 13PCS Drill Bit Set |
| Color | tin coated |
| Use | Metal Drilling |
| Payment Terms | L/C, D/P, T/T, Western Union |
| Supply Ability | 300,0000PCS PER MOUTH |
| Delivery Time | 30-45days |
| Packaging Details | metal box |
| Shank | Round/Three-flatted/Hex shank and so on |
| Packing | Aluminium case or as your request |
| Application | Drilling Holes,Stainless Steel,concrete etc. |
| Process | Fully Ground |
| Material | HSS-M35 |
| Feature | Sharpness,High Speed.Straight Smooth Edge,Longer Working Life |
| Type | HSS Cobalt Twist Drill Bit |
| Brand Name | XRTOOLS |
| Model Number | 13PC |
| Certification | ISO9000 |
| Place of Origin | CHINA |
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Product Specification
| Product name | 13PCS Drill Bit Set | Color | tin coated |
| Use | Metal Drilling | Payment Terms | L/C, D/P, T/T, Western Union |
| Supply Ability | 300,0000PCS PER MOUTH | Delivery Time | 30-45days |
| Packaging Details | metal box | Shank | Round/Three-flatted/Hex shank and so on |
| Packing | Aluminium case or as your request | Application | Drilling Holes,Stainless Steel,concrete etc. |
| Process | Fully Ground | Material | HSS-M35 |
| Feature | Sharpness,High Speed.Straight Smooth Edge,Longer Working Life | Type | HSS Cobalt Twist Drill Bit |
| Brand Name | XRTOOLS | Model Number | 13PC |
| Certification | ISO9000 | Place of Origin | CHINA |
| High Light | Precision Ground Drill Bit Set ，Drill Bit Set 135C Split Point ，Auto hss m35 cobalt drill bits | ||
Designed for real shop workloads, this 13-piece M35 cobalt HSS (≈5% Co) kit combines a 135° split-point with precision-ground flutes to start fast, drill true, and last longer in stainless, carbon & alloy steels, and cast iron. Jobber-length, round-shank bits fit any 3-jaw chuck (corded, cordless, drill press). A compact metal index case keeps sizes organized for grab-and-go efficiency in the bay or on the road.
Built for tough metals: M35 cobalt maintains hot-hardness in 304/316 stainless, carbon & alloy steels; fewer change-outs, cleaner holes.
Fast, clean starts: 135° split point is self-centering, resists walking on curved/painted panels, and lowers thrust at breakthrough.
Run true, evacuate chips: Precision-ground flutes improve concentricity and chip flow for rounder holes and better finishes.
Shop-friendly set map: 13 essential inch sizes cover common pilot/clearance/tap-drill prep used across brakes, body & under-hood jobs.
Ready for daily use: Jobber length, round shank, and a labeled steel index box speed selection, storage, and inventory.
Drill out broken studs/bolts, exhaust manifold & bracket holes, frame/chassis work
Stainless steel drilling, sheet-metal & panel repair, and tap-drill preparation
Automotive MRO & fabrication · HVAC/Electrical panels · Mounting holes & accessory installs
| Feature | Details |
|---|---|
| Material | M35 Cobalt HSS (~5% Co) |
| Tip Geometry | 135° split point, web-thinned (self-centering, low thrust) |
| Flutes | Precision-ground twist flutes, polished for chip evacuation |
| Length Type | Jobber (ANSI / DIN 338 equivalent) |
| Shank | Round, 3-jaw chuck compatible |
| Finish | Bright ground (options: Black & Gold, Black Oxide) |
| Recommended Materials | Stainless 304/316, carbon & alloy steel, cast iron, aluminum/brass |
| Storage | Metal index case, size-stamped wells |
| Resharpenable | Yes — maintain split-point geometry |
| Size (in) | OAL (in) | FL (in) |
|---|---|---|
| 1/16 | 1.875 | 0.875 |
| 5/64 | 2.000 | 1.000 |
| 3/32 | 2.250 | 1.125 |
| 7/64 | 2.375 | 1.250 |
| 1/8 | 2.750 | 1.625 |
| 9/64 | 2.875 | 1.750 |
| 5/32 | 3.000 | 2.000 |
| 11/64 | 3.125 | 2.125 |
| 3/16 | 3.500 | 2.375 |
| 13/64 | 3.625 | 2.500 |
| 7/32 | 3.750 | 2.625 |
| 15/64 | 3.875 | 2.750 |
| 1/4 | 4.000 | 2.750 |
| Material | Surface Speed (SFM) | Notes |
|---|---|---|
| Stainless 304/316 | 25–40 | Cutting oil; peck on deep holes |
| Carbon/Alloy Steel | 40–70 | Oil extends life |
| Cast Iron | 50–80 | Dry or minimal oil; avoid rubbing |
| Aluminum/Brass | 150–250 | Light oil optional for finish |
Retail-ready metal index case (sleeved & barcoded); master cartons for distributors
Private label/OEM: custom assortments (metric/imperial), finish options, laser-etched logo, EN/RU bilingual labels & spec sheets
Will these drill stainless reliably?
Yes—M35 cobalt + 135° split point are engineered for stainless. Use lower RPM, cutting oil, and peck cycles.
Impact-driver compatible?
Round shank bits are for 3-jaw chucks. Hex-shank cobalt variants available on request.
Can I get tap-drill or metric-specific maps?
Absolutely—OEM assortments tailored to common automotive tap sizes or metric ranges are available.
Can they be resharpened?
Yes. Regrind while keeping the split-point geometry; M35 grinds cleanly and holds an edge.
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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