Chicago-latrobe 50075 Cobalt Drill Bit 33/64 in 135 Deg

Product Description

The CHICAGO-LATROBE 50075 is a cobalt jobber-length drill bit built for heavy-duty drilling in hard and abrasive materials. Manufactured from M42 cobalt high-speed steel and finished with a gold oxide coating, it maintains cutting edge integrity at elevated temperatures generated when working through tough workpieces. The 135-degree split point reduces walking and decreases the thrust required to start a hole without a center punch. At 6-5/8 inches overall length with a 4-13/16 inch flute length, this is a standard jobber-length configuration suited to drill presses, mag-base drills, and hand-held power tools.

This drill bit is rated for primary use in titanium and similarly demanding materials including high-alloy steels and stainless. Its Series 550 designation and M42 grade make it appropriate for aerospace, industrial maintenance, and heavy fabrication environments where standard HSS bits fail prematurely. The straight-cylindrical shank at 33/64 inch diameter fits standard three-jaw chucks without adaptation. Right-hand spiral fluting with a regular helix efficiently clears chips during through-hole and blind-hole operations.

Key Features

• M42 cobalt HSS construction resists heat buildup in hard-material drilling
• 135-degree split point reduces thrust and prevents bit walking on entry
• Gold oxide coating provides lubricity and additional surface hardness
• Web-thinned, tapered web design improves chip evacuation and reduces cutting resistance
• Meets DIN 338 and NAS 907 Type J standards for dimensional and performance compliance
• Two-flute spiral design with regular helix suits a wide range of feed rates and material types

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for industrial and aerospace drilling applications requiring NAS 907 Type J compliance and M42 cobalt-grade tooling.

Installation Notes

Installation of this drill bit should be performed by a qualified machinist or technician familiar with metalworking practices. Secure the straight-cylindrical shank firmly in a three-jaw chuck, confirming concentricity before use to avoid runout-related breakage. Power down and de-energize the drilling equipment before changing bits. Follow applicable shop safety standards and use appropriate cutting fluid or coolant when drilling titanium or high-alloy materials, even though this bit does not have through-coolant capability.