ZHANGJIAGANG FLAME MACHINERY CO.,LTD.
| Color | amber color |
| Use | Metal Drilling |
| Application | Drilling Holes,Stainless Steel,concrete etc. |
| Shank | Round/Three-flatted/Hex shank and so on |
| Type | HSS Cobalt Twist Drill Bit |
| Payment Terms | L/C, D/P, T/T, Western Union |
| Supply Ability | 300,0000PCS PER MOUTH |
| Delivery Time | 30-45days |
| Packaging Details | metal box |
| Material | HSS-M35 |
| Product name | 115PCS Drill Bit Set |
| Process | Fully Ground |
| Feature | Sharpness,High Speed.Straight Smooth Edge,Longer Working Life |
| Packing | Aluminium case or as your request |
| Brand Name | XRTOOLS |
| Model Number | 115PC |
| Certification | ISO9000 |
| Place of Origin | CHINA |
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Product Specification
| Color | amber color | Use | Metal Drilling |
| Application | Drilling Holes,Stainless Steel,concrete etc. | Shank | Round/Three-flatted/Hex shank and so on |
| Type | HSS Cobalt Twist Drill Bit | Payment Terms | L/C, D/P, T/T, Western Union |
| Supply Ability | 300,0000PCS PER MOUTH | Delivery Time | 30-45days |
| Packaging Details | metal box | Material | HSS-M35 |
| Product name | 115PCS Drill Bit Set | Process | Fully Ground |
| Feature | Sharpness,High Speed.Straight Smooth Edge,Longer Working Life | Packing | Aluminium case or as your request |
| Brand Name | XRTOOLS | Model Number | 115PC |
| Certification | ISO9000 | Place of Origin | CHINA |
| High Light | round drill set twist ，drill set twist 115 Piece ，M35 14mm drill bit for steel | ||
Engineered for shops that drill tough metals all day, this 115-piece M35 cobalt HSS (≈5% Co) drill set pairs a fully-ground body with a 135° split point for fast, self-centering starts and cleaner, rounder holes. The round-shank, jobber-length design fits any 3-jaw chuck, while the heavy-duty metal index case keeps every size organized for quick picks on the bench or at the jobsite.
Built for stainless: M35 cobalt maintains edge hardness at high temperature—perfect for 304/316 stainless, carbon & alloy steels, and cast iron.
Clean starts, less walking: 135° split-point reduces thrust, skidding, and burr at breakthrough.
Fully ground flutes: Better concentricity and chip evacuation = smoother holes, longer life.
Complete size coverage: One case covers pilots to large holes—no more hunting for the right bit.
Shop-ready storage: Labeled metal index with tight wells and durable hinge for daily use.
| Series | Range | Count |
|---|---|---|
| Numbered | #1–#60 | 60 |
| Letter | A–Z | 26 |
| Fractional (inch) | 1/16"–1/2" by 1/64" | 29 |
| Total | 115 |
| Feature | Details |
|---|---|
| Substrate | M35 Cobalt High-Speed Steel (≈5% Co) |
| Geometry | 135° split-point, web-thinned (self-centering, low thrust) |
| Flutes | Fully ground twist flutes, polished for chip flow |
| Length Type | Jobber (ANSI/DIN 338 equivalent) |
| Shank | Round, 3-jaw chuck compatible |
| Finish | Bright ground (optional Black & Gold / Black Oxide/Gold ) |
| Hardness (typ.) | ≥ HRC 66 after heat treatment |
| Tolerances | Tight runout/concentricity; size laser-marked (option) |
| Recommended Materials | Stainless (304/316), carbon & alloy steel, cast iron, bronze/brass, aluminum |
| Resharpenable | Yes—maintain split-point geometry |
| Storage | Metal index case, labeled trays for Number/Letter/Fractional |
| Material | Surface Speed (SFM) | Notes |
|---|---|---|
| Stainless 304/316 | 25–40 | Use cutting oil; peck on deep holes |
| Carbon/Alloy Steel | 40–70 | Coolant/oil extends life |
| Cast Iron | 50–80 | Dry or minimal oil; avoid rubbing |
| Aluminum/Brass | 150–250 | Light oil optional for finish |
Fabrication & MRO: brackets, channel, plate, frames, handrails
Electrical/HVAC: panels, enclosures, pilot holes for knockouts
Automotive/Upfit: mounts, fastener prep, stainless trim
General workshop: jigs, fixtures, small-batch production
Case: heavy-gauge metal index, labeled wells, retail sleeve & barcode
Wholesale: master cartons for distributors; spare tray sets available
OEM/Private label: custom assortments (metric/imperial/mixed), finish options, laser-etched sizes, EN/RU bilingual labels, spec sheets with your branding
Q1: Will these drill stainless reliably?
Yes—M35 cobalt + 135° split-point are designed for stainless. Use lower RPM, cutting oil, and peck cycles.
Q2: Impact-driver compatible?
Round shanks are for 3-jaw chucks. Ask about hex-shank cobalt variants for impact drivers.
Q3: Can I resharpen them?
Absolutely. Regrind while keeping the split-point geometry; M35 grinds cleanly.
Q4: Metric version available?
Yes—metric and mixed maps are available for OEM orders.
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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