Chicago-Latrobe
Chicago-Latrobe 54063 21/64 in 135° Cobalt Jobber Drill Bit
Cobalt jobber drill bit with 135-degree split point for 21/64 in holes
- TypeDrill Bits
- MaterialHAWA
- 21/64 in diameter drills precise fractional holes
- 135° split point starts on contact without wandering
- Cobalt construction resists heat in tough alloys
- TiN coating reduces friction for longer edge life
- Jobber length suits standard chucks and deep reach
Chicago-Latrobe 54063 Cobalt Jobber Bit
The Chicago-Latrobe 54063 is a 21/64 inch cobalt jobber length drill bit built for heavy-duty metal drilling. Its 135 degree split point reduces walking and starts on contact without a centre punch. The cobalt construction resists heat and wear in tough alloys.
TiN Coated 135 Degree Split Point Design
A titanium nitride coating adds surface hardness and lowers friction during high-speed cutting. The split point geometry centres the bit instantly and clears chips efficiently through the flutes. No coolant holes are present so external lubrication is used for deep holes.
For Machinists Drilling Hard Steel
This bit suits machinists and maintenance technicians drilling stainless steel, titanium or high-strength alloys where standard HSS dulls quickly. It is not for buyers who need coolant-through capability for deep-hole production runs or bits with a different point angle for specialised materials.
Highlights
- 21/64 in diameter drills precise fractional holes
- 135° split point starts on contact without wandering
- Cobalt construction resists heat in tough alloys
- TiN coating reduces friction for longer edge life
- Jobber length suits standard chucks and deep reach
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How does the 135-degree split point perform when drilling cobalt steel for long periods?
The 135-degree split point reduces walking and starts cutting immediately, helping maintain accuracy during extended drilling in hard materials like cobalt steel.
Does the TiN coating on the 21/64-inch bit reduce heat buildup during all-day use?
The TiN coating increases surface hardness and lubricity, which lowers friction and heat generation when the bit runs continuously in tough alloys.
What shank size must my drill chuck accept to hold the 0.3281-inch diameter shank?
Your drill chuck must accommodate at least a 21/64-inch (0.3281-inch) shank diameter to secure this jobber-length bit properly.
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