Chicago-Latrobe
Chicago-Latrobe 50826 Screw Machine Drill Bit 29/64 in 135 Degrees
Cobalt screw-machine drill bit, 29/64 inch with 135-degree split point for right-hand cutting
- TypeDrill Bits
- Precise drilling with 135-degree split point
- 29/64 inch size for specific applications
- Cobalt construction resists heat and wear
- Right-hand cutting direction for standard use
- Decimal equivalent .4531 for exact measurement
Drill Bit Size 29/64 Inch
This Chicago-Latrobe screw machine drill bit measures 29/64 inch with a 135-degree split point. Made from cobalt steel with a straw finish, it is designed for right-hand cutting in metalworking applications. The decimal equivalent is 0.4531 inches. It suits machinists and maintenance technicians who need a durable bit for screw machine work.
Installation and Common Issues
The bit fits standard drill chucks that accept a 29/64 inch shank. No special tools or adapters are required for mounting. Problems usually arise when the workpiece is not clamped securely, causing the split point to wander or the cobalt edge to chip. Running without coolant in tough alloys can also overheat the cutting edges and reduce tool life.
Capacity and Headroom
The 135-degree split point centres quickly in steel and stainless alloys, handling production runs in screw machines and drill presses. Cobalt construction resists heat better than high-speed steel, giving more holes per sharpening in abrasive materials. The bit reaches its limit in very deep holes where chip evacuation becomes difficult, or in hardened steels above its hardness range where a carbide tool would be necessary.
Highlights
- Precise drilling with 135-degree split point
- 29/64 inch size for specific applications
- Cobalt construction resists heat and wear
- Right-hand cutting direction for standard use
- Decimal equivalent .4531 for exact measurement
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
How can I verify the 135-degree split point is cutting correctly after first use?
The bit should start on contact without wandering and produce clean chips in steel, confirming the 135-degree split point is working as intended.
Does the 50826 bit come with any case or lubricant, or must I buy those separately?
Only the single 29/64-inch cobalt drill bit is included; no case, lubricant or additional accessories are supplied.
When should I choose the 29/64-inch .4531 decimal size over other diameters?
Select this 29/64-inch size when the job requires a .4531-inch hole; match the diameter to the fastener or clearance specification you are drilling for.
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