Chicago-Latrobe
Chicago-Latrobe 43640 29pc HSS 135° Drill Bit Set
Contains 29 high-speed steel jobber-length drill bits with a 135-degree point angle and TiCN finish
- TypeDrill Bits
- Color/FinishBlack/Yellow
- 29-piece set covers a wide range of drilling tasks
- 135-degree split point reduces walking and starts holes cleanly
- High-speed steel construction resists wear in metal and wood
- TiCN finish adds hardness and heat resistance for longer life
Chicago-Latrobe 43640 29-Piece Drill Bit Set
The Chicago-Latrobe 43640 set contains 29 jobber-length drill bits manufactured from high-speed steel with a 135-degree split point. A TiCN coating provides a hard, low-friction surface that resists wear and reduces heat buildup during operation. The black and yellow finish identifies the coating and material grade. These bits are designed for general-purpose drilling in metal, wood, and plastic.
Suited for general workshop and maintenance tasks
This set suits mechanics, fabricators, and DIY users who need a broad range of standard fractional sizes in a single indexed case. The 135-degree point starts accurately on curved or hard surfaces without a centre punch. Buyers requiring specialised geometries for deep-hole drilling, composite materials, or high-volume production runs should evaluate dedicated tooling for those applications.
Highlights
- 29-piece set covers a wide range of drilling tasks
- 135-degree split point reduces walking and starts holes cleanly
- High-speed steel construction resists wear in metal and wood
- TiCN finish adds hardness and heat resistance for longer life
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Color/Finish | Black/Yellow |
Questions about this item
How do I install the Chicago-Latrobe 43640 29pc HSS 135° drill bits into my drill chuck, and what step do people often get wrong?
Open the chuck fully, insert the bit shank straight and deep so the jaws grip the smooth shank — not the flutes — then tighten firmly by hand or key; the common mistake is clamping on the flutes, which causes run-out and bit breakage.
What maintenance or replacement will the Chicago-Latrobe 43640 29pc HSS 135° drill bit set need later?
The TiCN coating on the high-speed steel bits reduces wear, but the cutting edges will dull with use; resharpen at 135° when holes become rough or feed force rises, and replace any bit that chips or loses its split-point geometry.
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