Chicago-Latrobe
Chicago-Latrobe 46628 Jobber Drill Bit 7/16 in 135° Cobalt
Cobalt jobber drill bit with 135-degree split point for 7/16 inch holes
- TypeDrill Bits
- MaterialHAWA
- 7/16 in size drills precise holes in metal
- 135-degree split point starts cleanly without wandering
- Cobalt HAWA material resists heat for longer edge life
- Jobber length offers versatile reach for general drilling
- Decimal equivalent .4375 matches fractional specifications exactly
7/16″ Cobalt Jobber Bit for Hard Metals
The Chicago-Latrobe 46628 is a 7/16 inch cobalt drill bit built for jobber-length drilling in tough alloys. Its 135 degree split point reduces walking and starts holes cleanly in stainless steel and other hard materials. The straw-bronze finish signals the cobalt content that resists heat and wear. It suits mechanics and fabricators who need reliable performance on difficult metals.
135 Degree Split Point Limits Walking
The 135 degree point angle is optimised for hard materials but less aggressive in soft aluminium or plastic where it can grab. Cobalt steel holds an edge at high temperature yet is more brittle than high-speed steel, so heavy feed pressure risks chipping. The bit has no coolant holes, so deep holes require frequent withdrawal to clear chips and manage heat. Decimal equivalent is .4375 inch for precise layout.
Replaces Worn High-Speed Steel Bits in Stainless
When high-speed steel bits dull quickly in stainless or heat-treated steel, this cobalt bit restores cutting speed and tool life. The upgrade is worth it for repeated holes in hard alloys where heat builds up fast. It does not suit production lines needing through-coolant capability or very deep holes without pecking. Buyers who need larger diameters or longer lengths must look elsewhere.
Highlights
- 7/16 in size drills precise holes in metal
- 135-degree split point starts cleanly without wandering
- Cobalt HAWA material resists heat for longer edge life
- Jobber length offers versatile reach for general drilling
- Decimal equivalent .4375 matches fractional specifications exactly
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
Should I choose the 7/16 in cobalt bit or a smaller size for my project?
Select the 7/16 in size when you need a hole of .4375 decimal equivalent; choose a smaller bit for lighter fastening tasks or pilot holes in thinner material.
How does the 135° split point perform once the bit is in the drill?
The 135° split point centres itself on contact, reduces walking on hard surfaces, and cuts efficiently through tough alloys without needing a centre punch.
What does the cobalt construction mean for the bit's heat resistance and wear life?
Cobalt steel retains hardness at high drilling temperatures, so the cutting edges stay sharp longer when boring stainless steel, cast iron or other abrasive metals.
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