Olympia Tools 13 Pcs M35 Cobalt Drill Bit Set 1/16-1/4 135° 5471MGJB5454
A 13-piece M35 cobalt drill-bit set covers 1/16 to 1/4 inch sizes with 135° split tips for precise starts in metal, wood and plastic, all organised in a labelled storage case
- MaterialPlastic
- Selling UnitSet
- FeaturesWidely Use
- Item Count2 pack
- 13-piece M35 cobalt set covers 1/16 to 1/4 inch drilling needs
- 5% cobalt steel delivers superior heat resistance and hardness over standard HSS
- 135° split tip self-centres instantly to prevent bit drift
- Works on stainless steel, cast iron, copper, aluminium, wood and plastic
- Precision-moulded indexed case keeps every bit organised and easy to find
13-Piece M35 Cobalt Drill Bit Set
This 13-piece set uses M35 cobalt alloy steel with 5% cobalt content for high hardness and heat resistance. Sizes range from 1/16 inch to 1/4 inch to cover common drilling tasks. The 135-degree split tip centres itself on contact and reduces bit wander. A moulded storage case keeps each bit labelled and accessible.
Practical limits of cobalt alloy bits
Cobalt steel resists heat better than standard high-speed steel but remains brittle under side loads. The 135-degree point works well on stainless steel, cast iron, copper and aluminium. Plastics and wood can be drilled, though aggressive flutes may grab thin sheet stock. The set stops at 1/4 inch, so larger holes require different tooling.
Installation and common issues
Bits fit any standard drill chuck that accepts 1/4-inch shanks. Secure the workpiece to prevent the bit from walking despite the self-centring tip. Use cutting fluid on hard metals to manage temperature and extend edge life. Avoid excessive feed pressure, which can snap the brittle cobalt body. Replace bits once the split tip rounds over.
Highlights
- 13-piece M35 cobalt set covers 1/16 to 1/4 inch drilling needs
- 5% cobalt steel delivers superior heat resistance and hardness over standard HSS
- 135° split tip self-centres instantly to prevent bit drift
- Works on stainless steel, cast iron, copper, aluminium, wood and plastic
- Precision-moulded indexed case keeps every bit organised and easy to find
Specifications
| Brand | Olympia Tools |
|---|---|
| Model | Hand Rivet Nut Setter Kit |
| Material | Plastic |
| Selling Unit | Set |
| Features | Widely Use |
| Item Count | 2 pack |
| Part Number | 5471MGJB5454 |
Questions about this item
Which bit sizes are included in this 13-piece set?
The set covers 13 common fractional sizes from 1/16 inch up to 1/4 inch, each with a labelled slot in the storage case for quick identification.
How does the 135° split tip perform when drilling stainless steel?
The self-centering 135° split tip engages the surface instantly, reduces bit walk, and the optimized flutes clear chips quickly so the cobalt alloy stays cool in tough alloys.
What does the M35 cobalt designation mean for heat resistance?
M35 steel contains 5% cobalt, giving it higher hardness and heat resistance than standard high-speed steel, so the bits withstand the temperatures generated in hardened metals.
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