Hertel 42295 Cobalt Jobber Drill 10.50mm 135 Deg Split Point

Product Description

The HERTEL 42295 is a cobalt jobber-length drill bit ground to a 135-degree split point and designed for demanding metalworking applications. Built from M35 cobalt high-speed steel, it delivers higher heat resistance and edge retention than standard HSS drills when cutting through tough materials. The bit measures 10.50 mm (0.4134 inches) in diameter with an overall length of 133.00 mm (5.2362 inches) and a flute length of 87.00 mm (3.4252 inches). The straight cylindrical shank fits standard drill chucks without adapters, and the right-hand spiral flute geometry clears chips efficiently during deep-hole passes.

This drill bit is suited for production and maintenance drilling in stainless steel, hardened materials, and other alloys that generate high cutting temperatures. Machinists, tool-and-die technicians, and maintenance mechanics reach for cobalt-grade jobber drills when standard HSS tooling dulls prematurely or glazes on work-hardening materials. The 5xD flute-to-diameter ratio provides adequate flute length for typical jobber-depth holes without sacrificing rigidity. It is sold as a single unit with a minimum order quantity of one.

Key Features

• M35 cobalt HSS construction for elevated heat and wear resistance
• 135-degree split point reduces walking and lowers thrust force at entry
• Right-hand regular spiral flute promotes efficient chip evacuation
• Straight cylindrical shank compatible with standard drill chucks and collets
• Oxide finish provides light corrosion resistance during storage and use
• Heavy-duty grade rated for stainless steel and hardened material drilling

Compatibility

Designed as a jobber-length drill bit for use in standard drill chucks, CNC machining centers, drill presses, and handheld power tools accepting straight-shank tooling in the 10.00 mm to 12.50 mm diameter range.

Installation Notes

Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits for the application. Use cutting fluid or coolant when drilling stainless steel to reduce work hardening and extend tool life. Reduce feed pressure as the drill breaks through to avoid bit deflection or workpiece damage. Inspect the cutting edges before each use and replace the bit if chipping or significant dulling is observed.