Chicago-Latrobe
Chicago-Latrobe Jobber Drill Bit R HSS 53885
High-speed steel jobber drill bit, size R with 135-degree split point and TiN coating for .3390-inch holes
- TypeDrill Accessories
- MaterialHAWA
- Split-point tip reduces walking on hard materials
- 135° point angle centres the bit for accurate starts
- High-speed steel with TiN coating resists wear and heat
- Decimal size .3390 matches letter R for precise hole diameter
Jobber Drill Bit R HSS 53885
This Chicago-Latrobe jobber drill bit is made from high-speed steel with a TiN coating. It features a 135-degree split point for accurate starting and reduced walking. The decimal equivalent is .3390 inch. It suits professional mechanics and metalworkers needing reliable hole-making in steel and alloys.
Upgrade from worn or standard bits
Replaces dull or uncoated jobber bits that wander on hard materials. The split-point geometry and TiN layer extend cutting life in repetitive drilling. The jump is worth it when precision starts matter more than lowest cost per bit.
Highlights
- Split-point tip reduces walking on hard materials
- 135° point angle centres the bit for accurate starts
- High-speed steel with TiN coating resists wear and heat
- Decimal size .3390 matches letter R for precise hole diameter
Specifications
| Brand | Chicago-Latrobe |
|---|---|
| Type | Drill Accessories |
| Material | HAWA |
Questions about this item
What chuck size is required for the 0.3390 inch shank on this jobber drill bit?
A standard three-jaw chuck that opens to at least 0.3390 inches will hold the straight shank securely.
How should the 135 degree split point be started to avoid walking on hard steel?
Centre-punch the exact hole location, then apply steady pressure while keeping the drill perpendicular so the split point engages immediately.
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