Chicago-Latrobe
Chicago-Latrobe 69870 29PC 135° Cobalt Jobber Drill Bit Set
A 29-piece cobalt jobber drill bit set with a 135-degree point angle and TiN finish for heavy-duty machining
- TypeDrill Bits
- 29-piece cobalt set covers common drilling sizes
- 135° split point starts on contact without wandering
- Cobalt steel resists heat during heavy-duty drilling
- TiN coating reduces friction and extends bit life
- Jobber length suits standard drill chucks and depths
29-piece cobalt drill bit set
This 29-piece Chicago-Latrobe set supplies a full range of jobber-length bits made from machining-grade cobalt. It is aimed at mechanics, fabricators and maintenance technicians who need reliable holes in steel, stainless and other tough alloys. The TiN finish adds surface hardness and reduces friction during extended drilling sessions. Every bit shares the same 135-degree split point for quicker starts.
Capacity and headroom with 29 bits
Twenty-nine bits cover the common fractional sizes encountered in day-to-day metalwork, so the set handles most production and repair tasks without hunting for a missing diameter. Cobalt construction resists heat buildup better than standard high-speed steel, letting the bits stay sharp longer in abrasive materials. The 135-degree point angle reduces walking on hard surfaces, but very large or specialised hole sizes will still require separate tooling.
Fitting the set into a workshop
The jobber-length geometry fits standard drill chucks and quick-change adapters, so no special holders are needed. TiN coating cuts down on coolant use and chip welding, freeing up time between bit changes. The indexed case keeps the 29 pieces organised and protects the cutting edges from damage in transit. Users who need metric sizes or extra-long reach will have to supplement this collection.
Highlights
- 29-piece cobalt set covers common drilling sizes
- 135° split point starts on contact without wandering
- Cobalt steel resists heat during heavy-duty drilling
- TiN coating reduces friction and extends bit life
- Jobber length suits standard drill chucks and depths
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
Will the 29-piece cobalt set handle the same steels my current high-speed steel bits struggle with?
The 135-degree split point on these cobalt bits starts on contact and resists heat better than standard high-speed steel, so they cut tough alloys without walking.
How can I verify the 135-degree split point is cutting correctly on first use?
A clean, centred hole with minimal pressure and short, curled chips shows the cobalt tips and TiN finish are performing as designed.
Does the 69870 index case hold all 29 bits securely, or do I need a separate organiser?
The supplied metal index case has labelled slots for every one of the 29 jobber-length bits, keeping them protected and sorted out of the box.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
