13-Pc M35 Cobalt Drill Bit Kit — Precision-Ground, 135° Split Point, Auto Repair / Stainless / Metal
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.
Why technicians choose it (merged highlights)
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.
High-Intent Applications (search-optimized)
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
Product Specifications
| 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 |
Inch Size Map with Overall Length (OAL) & Flute Length (FL)
| 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 |
Speed & Feed Quick Guide (rule-of-thumb)
| 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 |
Packaging & OEM (wholesale-ready)
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
FAQ
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.
Product Tags:
|
|
Precision Ground Drill Bit Set 135C Split Point For Auto Repair Stainless Images
|
