Chicago-Latrobe
Chicago-Latrobe 44917 17/64 in 135 Degree Cobalt Jobber Drill Bit
A 17/64 inch cobalt jobber drill bit with a 135-degree split point for hard-metal drilling
- TypeDrill Bits
- 17/64 in diameter drills precise fractional holes
- 135 degree split point starts fast without wandering
- Cobalt steel resists heat in hard metals
- TiAlN coating extends cutting life significantly
- Jobber length reaches deep workpieces easily
Chicago-Latrobe 17/64 in Cobalt Jobber Bit
The Chicago-Latrobe 44917 is a 17/64 inch cobalt jobber length drill bit built for heavy-duty drilling in hard metals. Its 135 degree split point reduces walking and starts holes cleanly without a centre punch. The TiAlN coating adds wear resistance and helps manage heat during extended use. It suits maintenance technicians and metal fabricators who need reliable performance in stainless steel or high-strength alloys.
Straight shank fits standard chucks without adapters
The bit installs directly into any three-jaw chuck that accepts a 17/64 inch shank, so no special holders or bushings are required. Cobalt steel is harder than high-speed steel, so feed pressure must stay steady; forcing the cut can chip the cutting lips. The split point geometry reduces thrust, but the drill press or hand drill must run true to avoid premature wear. Coolant is recommended for deep holes because the bit has no internal coolant holes.
Verify chuck capacity
Check that your drill chuck opens to at least 17/64 inch (decimal equivalent 0.2656) and that the spindle run-out is minimal. The 135 degree point angle is optimised for hard materials; softer metals such as aluminium may grab and require a different point geometry. Ensure your application does not need through-coolant delivery, as this bit has zero coolant holes. The TiAlN coating performs best with rigid setups and consistent feed rates.
Highlights
- 17/64 in diameter drills precise fractional holes
- 135 degree split point starts fast without wandering
- Cobalt steel resists heat in hard metals
- TiAlN coating extends cutting life significantly
- Jobber length reaches deep workpieces easily
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
How can I confirm the 135-degree split point is cutting correctly after I start drilling?
A properly working 135-degree split point will self-centre on contact and produce short, curled chips rather than long strings when drilling steel.
What comes in the package for part 44917 and is anything else required to use it?
The box contains the single 17/64 inch cobalt jobber drill bit with TiAlN coating; no additional accessories are included, so ensure your drill chuck accepts straight shanks of this diameter.
Which version of the 44917 should I choose for general-purpose metal drilling?
The 44917 is offered in one specification — 17/64 inch diameter, 135-degree split point, cobalt construction with TiAlN coating — so select this model when that exact size and geometry match your hole requirement.
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