Chicago-Latrobe
Chicago-Latrobe 54062 135 Degree Cobalt Jobber Length Drill
A 5/16-inch cobalt jobber drill with a 135-degree split point for hard-metal drilling
- TypeDrill Bits
- MaterialHAWA
- 135-degree split point starts holes cleanly without wandering
- Cobalt HAWA material resists heat for longer edge life
- TiN coating reduces friction and extends bit durability
- Jobber length reaches standard drilling depths in one pass
- 5/16-inch diameter matches common fastener pilot-hole requirements
Chicago-Latrobe 54062 Jobber Drill
The Chicago-Latrobe 54062 is a jobber-length drill bit built for general-purpose metalworking. Its 5/16 inch diameter suits common fastening and clearance holes in steel, iron and similar alloys. The split-point tip reduces walking on hard surfaces so the bit starts on mark without a centre punch. Machinists and maintenance technicians who need a reliable fractional bit for handheld or press drilling will find it practical.
135 Degree Split Point Cobalt Steel
The 135-degree split point centres the cut instantly and lowers thrust force during normal drilling. Cobalt alloy steel with a titanium nitride coating resists heat buildup and edge wear when cutting tougher materials. The solid flute design has no coolant holes, so chips clear through the flutes in standard operation. This construction keeps the bit running cooler and quieter than uncoated high-speed steel equivalents under the same load.
TiN Coating Extends Service Life
The titanium nitride surface treatment increases surface hardness and reduces friction against the workpiece. That coating lets the bit stay sharp longer in repetitive production runs or occasional repair jobs. No additional accessories, lubricants or software are included in the package. The bit is ready to use in any standard three-jaw chuck that accepts a 5/16 inch shank.
Highlights
- 135-degree split point starts holes cleanly without wandering
- Cobalt HAWA material resists heat for longer edge life
- TiN coating reduces friction and extends bit durability
- Jobber length reaches standard drilling depths in one pass
- 5/16-inch diameter matches common fastener pilot-hole requirements
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How do I install the 135 degree split-point 5/16 inch cobalt drill bit in my drill chuck, and what step is often missed?
Open the chuck fully, insert the bit shank completely, then tighten all three jaws evenly; the step often missed is verifying the bit runs true before drilling.
What maintenance or replacement will the TiN-coated cobalt drill bit need after extended use?
The TiN coating cannot be restored once worn; resharpen the 135 degree split point with a cobalt-approved grinder or replace the bit when cutting edges dull.
At what point does heat become the limiting factor when drilling steel with this 5/16 inch cobalt jobber bit?
Heat builds first at the cutting lips during sustained high-speed drilling; use cutting fluid and reduce RPM to keep the cobalt temper from drawing.
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