Chicago-Latrobe
Chicago-Latrobe 42786 135 Degree Heavy-Duty Jobber Length Drill pneumatic accessory
A 135-degree split-point jobber drill bit in high-speed steel with TiAlN coating, size P (.3230 decimal)
- TypeDrill Bits
- MaterialHAWA
- Split-point tip starts holes without wandering
- 135-degree point angle cuts hard materials efficiently
- High-speed steel body resists heat during heavy use
- TiAlN coating reduces friction and extends bit life
- Jobber-length shank fits standard pneumatic drill chucks
135-Degree Split-Point Jobber Drill
The Chicago-Latrobe 42786 is a high-speed steel drill bit with a TiAlN coating for extended wear resistance. Its 135-degree split point reduces walking and starts holes cleanly in steel and alloy. Decimal size .3230 matches letter P for precise pilot holes. Designed for maintenance and fabrication shops that need reliable jobber-length performance.
Sustained drilling in tough alloys
The TiAlN surface treatment resists heat buildup during repeated cuts, keeping the edge sharp longer than uncoated bits. Split-point geometry lowers thrust force, so the bit stays on centre without a centre punch. Non-coolant design means chips evacuate through standard flutes in through-hole and blind-hole work. Heavy-duty web construction resists breakage under continuous feed pressure.
Fits standard three-jaw chucks
Jobber-length shank seats securely in any 1/2-inch or larger drill chuck without adapters. No coolant holes simplify resharpening on a bench grinder or dedicated sharpener. Common error: running excessive RPM on stainless steel, which overheats the coating. Use cutting fluid and moderate speed to preserve the TiAlN layer and split-point geometry.
Highlights
- Split-point tip starts holes without wandering
- 135-degree point angle cuts hard materials efficiently
- High-speed steel body resists heat during heavy use
- TiAlN coating reduces friction and extends bit life
- Jobber-length shank fits standard pneumatic drill chucks
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
Will the 135-degree split point on the 42786 bit generate extra heat or noise during all-day pneumatic drilling?
The 135-degree split point is designed for efficient chip removal and reduced walking, which helps control heat buildup during extended use; pneumatic operation itself is the main noise source.
What pneumatic tool setup must I already own to run this jobber-length bit?
You need a pneumatic drill or rotary tool with a chuck that accepts a 0.3230-inch diameter shank and delivers the air pressure and flow the tool manufacturer specifies.
Can the 42786 bit be used in an older pneumatic drill that only takes straight-shank jobber bits?
Yes, the bit has a standard straight shank at 0.3230 inch, so it fits older jobber-length chucks without adapters.
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