Chicago-Latrobe
Chicago-Latrobe 54072 29/64 in 135° Cobalt Jobber Drill Bit
Cobalt jobber drill bit with 135-degree split point for 29/64 inch holes
- TypeDrill Bits
- MaterialHAWA
- 29/64 in diameter drills 0.4531 in holes
- 135° split point starts accurately without wandering
- Cobalt steel resists heat in tough metals
- TiN coating extends cutting life
- Jobber length fits standard drill chucks
Chicago-Latrobe 54072 Cobalt Jobber Bit
The Chicago-Latrobe 54072 is a heavy-duty cobalt jobber length drill bit designed for professional metalworking. Its 135-degree split point ensures accurate starting and reduces walking on hard surfaces. The TiN coating increases surface hardness and extends tool life. This bit suits machinists and maintenance technicians drilling tough alloys.
29/64 inch capacity with .4531 decimal equivalent
The 29/64 inch fractional size provides a precise .4531 decimal equivalent for close-tolerance holes in steel and stainless steel. Cobalt construction handles high drilling temperatures without losing hardness. The jobber length offers standard reach for general machine and handheld use. Non-coolant-through design limits deep-hole chip evacuation in high-volume production.
TiN coating and split point geometry
The titanium nitride coating reduces friction and heat buildup during extended cutting cycles. Split point geometry eliminates the need for centre punching on most materials. Zero coolant holes mean external lubrication is required for optimal performance. These features combine to lower cycle times and improve hole finish quality.
Highlights
- 29/64 in diameter drills 0.4531 in holes
- 135° split point starts accurately without wandering
- Cobalt steel resists heat in tough metals
- TiN coating extends cutting life
- Jobber length fits standard drill chucks
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
Will the 29/64 in cobalt bit fit the 1/2 in chuck on my older drill press?
The shank diameter matches the 29/64 in bit size at .4531 in, which is smaller than a 1/2 in chuck capacity, so it will clamp securely.
How can I confirm the 135-degree split point is engaging correctly when I start a hole?
The split point should self-centre on contact and produce a clean, centred mark without the bit wandering across the workpiece surface.
Does the 54072 come with a protective case or just the bare bit?
The supplied package contains the single cobalt jobber-length drill bit only; no case, index or lubricant is included.
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