Chicago-Latrobe
Chicago-Latrobe 45639 60PC 135 Degree Heavy-Duty Jobber Length Drill Set pneumatic accessory
A 60-piece jobber-length drill bit set with 135-degree points made from high-speed steel with a black oxide finish
- TypeDrill Bits
- 60-piece set covers a wide range of drilling tasks
- 135-degree point angle reduces walking on hard surfaces
- High-speed steel construction resists heat during extended use
- Black oxide finish adds corrosion resistance and chip flow
- Jobber length suits general-purpose drilling in metal and wood
60-piece jobber-length drill set
The Chicago-Latrobe 45639 set contains sixty high-speed steel drill bits in a jobber-length format. It is designed for mechanics, fabricators and maintenance technicians who need a broad range of sizes in a single package for general-purpose drilling tasks.
135-degree split point and black oxide finish
Each bit features a 135-degree point angle that reduces walking and allows faster penetration with less pressure. The black oxide finish adds corrosion resistance and helps retain cutting fluid during normal drilling operations in steel and other ferrous materials.
Heavy-duty construction for sustained cutting
The high-speed steel body maintains hardness during extended drilling sessions where heat builds up over time. This lets the set handle repetitive hole-making in tough alloys without the rapid edge degradation seen in lighter-duty bits.
Highlights
- 60-piece set covers a wide range of drilling tasks
- 135-degree point angle reduces walking on hard surfaces
- High-speed steel construction resists heat during extended use
- Black oxide finish adds corrosion resistance and chip flow
- Jobber length suits general-purpose drilling in metal and wood
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
How do I load the 60 high-speed steel bits with 135-degree points into a drill chuck without damaging the black oxide finish?
Open the chuck wide, insert the bit shank fully so the jaws grip the smooth section, then tighten firmly by hand or key; avoid over-tightening which can mar the oxide coating.
When will the 135-degree points on these 60 high-speed steel bits need resharpening or replacement?
Resharpen when the 135-degree point angle dulls enough to increase feed pressure or produce rough holes; a bench grinder or drill doctor restores the original geometry.
What stops me from drilling continuously with these 60 black-oxide high-speed steel bits in hard steel?
Heat buildup at the 135-degree cutting edges is the first limit; use cutting fluid and pause to let bits cool, otherwise temper loss dulls the points rapidly.
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