Chicago-Latrobe
Chicago-Latrobe 43637 15-piece 135-degree drill bit set
Fifteen jobber-length drill bits with a 135-degree point angle and TiCN-coated high-speed steel for heavy-duty drilling
- TypeDrill Bits
- MaterialHAWA
- 15-piece set covers common drilling tasks
- 135-degree split point reduces walking on hard surfaces
- TiCN coating extends bit life in steel
- Jobber length suits standard drill chucks
- High-speed steel construction handles heat during use
15-piece 135-degree drill bit set
The Chicago-Latrobe 43637 set contains 15 jobber length drill bits with a 135-degree point angle. Made from high-speed steel with a TiCN finish, they suit general workshop and automotive drilling tasks. The heavy-duty construction targets users who need reliable bits for repeated use. The set covers a range of common diameters in one package.
Heat resistance and cutting efficiency
The 135-degree point angle reduces thrust force and helps the bit start on contact without wandering. High-speed steel retains hardness at elevated temperatures generated during drilling. The TiCN coating lowers friction and wear, extending tool life in steel and alloy workpieces. Normal use produces manageable heat without specialised cooling.
Included bits and coating benefit
The set supplies 15 jobber length bits, eliminating the need to purchase individual sizes separately. The TiCN finish increases surface hardness and lubricity compared with uncoated or oxide-coated bits. This reduces chip welding and improves chip evacuation in deeper holes. No additional accessories or software are included with the product.
Highlights
- 15-piece set covers common drilling tasks
- 135-degree split point reduces walking on hard surfaces
- TiCN coating extends bit life in steel
- Jobber length suits standard drill chucks
- High-speed steel construction handles heat during use
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How are the 135-degree split-point bits installed in a drill chuck, and what step do users often skip?
Open the chuck fully, insert the bit shank until it seats against the jaws, then tighten securely; the step often missed is verifying the bit runs true before drilling.
What maintenance will the TiCN-coated HAWA steel bits need over time?
Clean chips from flutes after each use, apply light oil to prevent corrosion, and resharpen only when cutting edges dull — the TiCN coating cannot be reapplied at home.
At what point does heat become the limiting factor during sustained drilling with this 15-piece set?
Heat builds first at the cutting lips when feed pressure or speed is too high for the material, causing the TiCN coating to degrade and the HAWA steel to lose temper.
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