Chicago-Latrobe
Chicago-Latrobe 43787 Q 4-3/4" HSS 135° Split Point Drill Bit
A 4-3/4" jobber-length drill bit in high-speed steel with a 135° split point for self-centering starts
- TypeDrill Bits
- MaterialHAWA
- High-speed steel construction resists wear during repeated drilling
- 135-degree split point starts accurately without wandering
- TiCN coating reduces friction and extends cutting life
- Jobber length suits standard drill chucks and general use
- Letter Q size equals .3320 decimal for precise hole sizing
High-Speed Steel Jobber Bit
This Chicago-Latrobe drill bit is a jobber-length cutting tool made from high-speed steel for general-purpose drilling. It suits machinists, maintenance technicians and DIY users who need a reliable bit for steel, cast iron and other ferrous materials.
Split Point Starts on Contact
The 135-degree split point is self-centring, so the bit begins cutting immediately without a centre punch. This reduces walking on curved or hard surfaces. The TiCN coating adds hardness and heat resistance, but the bit has no coolant holes, so dry drilling deep holes can cause overheating and premature wear.
Check Shank and Material Compatibility
Verify that your drill chuck accepts the straight shank of this Q-size bit, which has a decimal equivalent of .3320. The tool is designed for ferrous metals; it is not suited for masonry, glass, wood or non-ferrous alloys such as aluminium or brass where a different point geometry is required.
Highlights
- High-speed steel construction resists wear during repeated drilling
- 135-degree split point starts accurately without wandering
- TiCN coating reduces friction and extends cutting life
- Jobber length suits standard drill chucks and general use
- Letter Q size equals .3320 decimal for precise hole sizing
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How do I confirm the 135° split point is cutting correctly after installing the 43787 bit?
The bit should start on contact without walking and produce short, curled chips in steel when the 135° split point is engaged properly.
What comes with the 43787 drill bit and what must I supply separately?
The box contains the single HSS jobber-length bit with TiCN coating; you provide the drill motor, chuck and cutting fluid.
Which letter-size version matches a .3320 decimal requirement?
The Q-size bit supplied under part 43787 has a .3320 decimal equivalent, so it is the correct choice for that specification.
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