Chicago-Latrobe
Chicago-Latrobe 40482 Extension Drill 3/8 in HSS Black Oxide 135° Split Point
A 3/8 inch high-speed steel extension drill bit with a 135° split point and black oxide finish for accurate starting and reduced friction
- TypeDrill Bits
- MaterialHAWA
- Split-point tip starts drilling on contact
- 135-degree point angle reduces walking on hard surfaces
- High-speed steel body resists heat during extended use
- Black oxide finish lowers friction and adds corrosion resistance
- 6-inch reach accesses deep or recessed holes
Chicago-Latrobe 40482 Extension Drill
This Chicago-Latrobe 40482 extension drill is a jobber-length bit made from high speed steel with a black oxide finish. It suits trade professionals and maintenance technicians who need reliable drilling performance in steel and other ferrous metals. The 135 degree split point design reduces walking and allows for faster penetration without a centre punch. It is built for repeated use in workshop and on-site applications.
Replaces worn or shorter bits for deeper reach
Switch to this bit when your current 3/8 inch drill is too short to reach the workpiece or when the cutting edges have dulled beyond resharpening. The high speed steel construction restores cutting speed and the split point geometry improves accuracy in harder materials. The upgrade is worth it when hole depth exceeds the flute length of your existing jobber drills or when black oxide lubricity is needed to reduce galling.
Check shank fit and machine capacity before ordering
Verify that your drill chuck accepts a 3/8 inch shank and that the spindle runout is low enough for a split point bit. Confirm the material thickness does not exceed the effective flute length for chip evacuation. Ensure the workpiece is clamped securely because the aggressive point angle pulls the bit in quickly. No coolant-through capability means external lubrication is required for deep holes.
Highlights
- Split-point tip starts drilling on contact
- 135-degree point angle reduces walking on hard surfaces
- High-speed steel body resists heat during extended use
- Black oxide finish lowers friction and adds corrosion resistance
- 6-inch reach accesses deep or recessed holes
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
Will the 3/8 in shank fit a standard drill chuck?
The shank is 3/8 in (0.3750 decimal equivalent) so it fits any chuck that accepts that diameter.
How do I install the split-point bit without it walking on the first hole?
Start the hole at low speed with light pressure; the 135° split point centres itself without a centre punch.
When should I replace the black-oxide high-speed-steel bit?
Replace it when the cutting edges no longer produce clean chips or the split point has worn round.
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