Chicago-Latrobe
Chicago-Latrobe 69886 26PC 135 Degree Cobalt Drill Bit Set
A 26-piece cobalt jobber-length drill bit set with 135-degree split points for hard-metal drilling
- TypeDrill Bits
- 26-piece set covers a wide range of drilling needs
- 135-degree split point starts on contact and reduces walking
- Cobalt steel construction resists heat and extends bit life
- Straw bronze finish adds corrosion resistance and improves chip flow
- Jobber length design suits general-purpose drilling in metal and wood
Professional Cobalt Drilling Set
The Chicago-Latrobe 69886 provides 26 jobber-length cobalt drill bits with a 135-degree point angle. The straw-bronze finish identifies the heavy-duty cobalt construction. This set equips workshops for demanding metal-drilling tasks where standard high-speed steel wears too quickly.
Upgrade From Standard Steel Bits
Machinists and maintenance teams replace general-purpose HSS sets when drilling stainless steel, titanium or high-temperature alloys. The cobalt substrate and split-point geometry reduce work hardening and walking, making the step up worthwhile for repeated hard-metal work.
Jobber Length And Material Limits
Jobber-length bits suit general machine and portable drilling but lack the reach of taper-length or aircraft-extension drills. Cobalt withstands higher heat than HSS yet remains brittle compared to carbide, so rigid setups and proper coolant are essential to prevent breakage.
Highlights
- 26-piece set covers a wide range of drilling needs
- 135-degree split point starts on contact and reduces walking
- Cobalt steel construction resists heat and extends bit life
- Straw bronze finish adds corrosion resistance and improves chip flow
- Jobber length design suits general-purpose drilling in metal and wood
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
What chuck size is required for the 135-degree cobalt bits in the 69886 set?
The jobber-length shanks fit standard three-jaw drill chucks up to the largest bit diameter in the 26-piece assortment.
How should I start each hole to prevent the 135-degree split point from walking on hard metal?
Centre-punch the location, then apply steady pressure at low RPM so the self-centring point engages before full speed.
When do the cobalt bits in this 26-piece set need resharpening or replacement?
Resharpen when the straw-bronze finish wears off the cutting lips or when drilling force increases noticeably on stainless steel.
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