Chicago-Latrobe
Chicago-Latrobe 45621 135 Degree Heavy-Duty Jobber Length Drill Bit 21/64 in
Heavy-duty jobber drill bit with 135-degree split point cuts 21/64 inch holes in metal
- TypeDrill Bits
- MaterialHAWA
- 135-degree split point starts on contact without wandering
- High-speed steel construction resists wear in tough materials
- Black oxide finish reduces friction and chip welding
- Jobber length gives standard reach for general drilling
- 21/64 inch diameter matches common fractional sizing
Application Focus
This Chicago-Latrobe 45621 drill bit handles 21/64 inch fractional holes with a 135 degree split point. The High Speed Steel body carries a Black Oxide finish for wear resistance in general-purpose metal drilling.
Who Benefits and Who Should Look Elsewhere
Machinists and maintenance technicians drilling steel, cast iron or similar alloys will value the self-centering split point. Buyers needing coolant-through capability or a larger diameter than 0.3281 inch decimal equivalent should select a different tool.
Decisive Specification
The 135 degree split point angle is the critical feature; it reduces thrust and starts accurately without a centre punch on hard materials, distinguishing this bit from standard point geometries.
Highlights
- 135-degree split point starts on contact without wandering
- High-speed steel construction resists wear in tough materials
- Black oxide finish reduces friction and chip welding
- Jobber length gives standard reach for general drilling
- 21/64 inch diameter matches common fractional sizing
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
Will the 21/64 in shank fit my drill chuck?
The 21/64 in fractional inch shank fits standard three-jaw chucks that accept that size.
How do I start a hole with the 135 degree split point?
Align the bit, apply steady pressure, and let the 135 degree split point self-centre without a centre punch.
When should I replace this high speed steel bit?
Replace when the cutting edges dull, the black oxide wears off, or the bit no longer cuts cleanly at 135 degrees.
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