Chicago-Latrobe
Chicago-Latrobe 69881 Left-Handed Helix Jobber Length Drill Set 15pc 118deg HSS
A 15-piece left-handed helix jobber-length drill set with 118-degree points made from high-speed steel
- TypeDrill Bits
- MaterialHigh Speed Steel
- Left-handed helix clears chips in reverse drilling
- 15-piece set covers common jobber-length sizes
- 118-degree point starts cleanly in steel and cast iron
- High-speed steel construction resists heat during extended use
- Bright uncoated finish reduces friction for smoother cuts
15-Piece Left-Handed Helix Jobber Drill Set
This Chicago-Latrobe 69881 set contains fifteen high-speed steel drill bits with a left-hand helix. They are designed for drilling into hardened metals or removing broken fasteners where standard right-hand bits fail. The 118-degree point angle provides general-purpose starting accuracy on steel and cast iron. Bright uncoated finish suits standard workshop use.
Left-Hand Helix and Jobber Length Constraints
Left-hand rotation means these bits require a reversible drill or driver running in reverse; they will not cut in forward gear. Jobber length offers standard reach for through-holes but lacks the rigidity of stub-length bits in deep or interrupted cuts. Bright finish provides no heat or wear coating, so cutting fluid is essential in tough alloys. Unsuitable for production CNC tool changers expecting right-hand shanks.
118-Degree Point Angle Determines Fit
The 118-degree point is the deciding spec: it centres well on flat surfaces but walks on curved or angled stock without a centre punch. Choose this set only when the application demands left-hand cutting geometry at that specific angle. Buyers needing split-point self-centring, coated edges for high-speed drilling, or right-hand helix for conventional tapping should select a different configuration.
Highlights
- Left-handed helix clears chips in reverse drilling
- 15-piece set covers common jobber-length sizes
- 118-degree point starts cleanly in steel and cast iron
- High-speed steel construction resists heat during extended use
- Bright uncoated finish reduces friction for smoother cuts
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | High Speed Steel |
Questions about this item
Which drill-bit set size should I choose for general maintenance?
This Chicago-Latrobe 69881 set contains 15 left-handed jobber-length bits made from high-speed steel with a bright finish, giving a broad range of diameters for common drilling tasks.
What does the 118-degree point angle mean when I am drilling?
The 118-degree point is a general-purpose geometry that centres easily in steel and other metals, offering reliable cutting action across the materials these high-speed steel bits are designed for.
How does the left-handed helix affect the way the bits cut?
The left-hand helix forces chips away from the cut in the opposite direction to standard bits, which helps when removing broken fasteners or drilling in applications where reverse rotation is used.
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