Chicago-Latrobe
Chicago-Latrobe 45628 135 Degree Heavy-Duty Jobber Length Drill
A 7/16-inch high-speed steel jobber drill bit with a 135-degree split point and black oxide finish
- TypeDrill Bits
- MaterialHAWA
- 135-degree split point starts on contact for accurate holes
- 7/16-inch diameter suits common fastening tasks
- High-speed steel construction resists wear in tough materials
- Black oxide finish reduces friction and adds corrosion resistance
- Jobber length provides versatile reach for general drilling
135° Split-Point Jobber Drill Bit
This Chicago-Latrobe drill bit is a fractional 7/16 inch high-speed steel cutting tool finished in black oxide. Its 135 degree split-point geometry provides immediate centring and reduces walking on hard materials. The jobber length suits general-purpose drilling in metal, plastic and wood for maintenance and fabrication tasks.
Suited for metalworkers needing self-centring starts
Machinists and fabricators who require a split-point tip for accurate hole placement on ferrous and non-ferrous stock will benefit. Builders needing coolant-through capability or a different point angle for specialised alloys should look at other tooling options.
7/16 inch fractional size
The bit diameter is the single specification that determines fit for a given hole requirement. Verify the 7/16 inch size against your drawing or tap chart before purchase to ensure correct clearance or thread engagement.
Highlights
- 135-degree split point starts on contact for accurate holes
- 7/16-inch diameter suits common fastening tasks
- High-speed steel construction resists wear in tough materials
- Black oxide finish reduces friction and adds corrosion resistance
- Jobber length provides versatile reach for general drilling
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
What chuck size does the 7/16 inch drill bit need?
The 7/16 inch shank requires a drill chuck that opens to at least 0.4375 inches, standard for most 1/2 inch capacity chucks.
How should the 135 degree split point be started to avoid walking?
Apply firm, steady pressure at the start; the split point is designed to self-centre without a centre punch, but letting the drill spin without load causes the bit to skate.
When does the black oxide coating on the high speed steel need attention?
The black oxide finish wears away with use; once the underlying bright steel shows along the cutting edges, the bit should be resharpened or replaced to maintain cutting efficiency.
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