Chicago-Latrobe
Chicago-Latrobe 45640 29PC 135 Degree Heavy-Duty Jobber Length Drill Set pneumatic accessory
29-piece high-speed steel drill bit set with 135-degree points and black oxide finish for heavy-duty jobber length drilling
- TypeDrill Bits
- 29-piece set covers common drilling tasks
- 135-degree split point reduces walking on hard materials
- High-speed steel construction withstands heavy-duty use
- Black oxide finish resists corrosion and wear
- Jobber length suits general-purpose drilling depth
Chicago-Latrobe 45640 Drill Set
This 29-piece drill bit set from Chicago-Latrobe delivers a comprehensive range of jobber-length bits for general-purpose drilling. It suits mechanics, fabricators and maintenance crews who need a ready-to-hand assortment in a single package.
135-Degree Point and Black Oxide Finish
The 135-degree split point reduces walking on contact and starts holes cleanly without a centre punch. Black oxide coating adds lubricity and resists corrosion, extending bit life when cutting steel, cast iron and other ferrous metals.
High-Speed Steel Construction
Each bit is ground from high-speed steel, the material that determines whether the set withstands the heat and abrasion of daily shop use. Buyers needing cobalt, carbide or coated bits for stainless steel or high-temperature alloys should look elsewhere.
Highlights
- 29-piece set covers common drilling tasks
- 135-degree split point reduces walking on hard materials
- High-speed steel construction withstands heavy-duty use
- Black oxide finish resists corrosion and wear
- Jobber length suits general-purpose drilling depth
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
Will the 135-degree split point on the high-speed steel bits need regrinding after repeated use?
The 135-degree split point is ground into the high-speed steel and can be resharpened when it dulls, extending the life of each bit in the 29-piece set.
Which component reaches its limit first when drilling continuously through hard steel?
The black oxide finish on the high-speed steel bits wears away first under sustained high-speed drilling, exposing the raw steel to heat and accelerated wear.
How much heat do the black oxide high-speed steel bits generate during all-day drilling?
The black oxide coating reduces friction and helps dissipate heat, but extended heavy-duty use will still raise bit temperature enough to require cutting fluid or cooling pauses.
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