Hertel 74130295 Cobalt Screw Machine Drill Bit 9/32 in

Product Description

The HERTEL 74130295 is a cobalt screw machine length drill bit designed for high-speed drilling in hard and abrasive materials. With a 9/32 inch (0.2812 inch) diameter and a 135-degree split point, it starts on contact without a center punch and reduces walking on curved or uneven surfaces. The split point geometry also lowers thrust and heat buildup during drilling. The overall length is 2-11/16 inches with a 1-1/2 inch flute length, making it well-suited for close-quarters drilling in production and maintenance environments. A straight cylindrical shank provides secure chuck engagement. This bit is used by machinists, maintenance technicians, and industrial tradespeople working with stainless steel, high-nickel alloys, and other tough materials that wear out standard HSS tooling quickly.

The HERTEL 74130295 fits standard drill chucks and is appropriate for use in drill presses, CNC machining centers, hand-held power drills, and screw machine applications where a shorter flute-to-length ratio improves rigidity and accuracy. The Series HSCO135 designation places it in a line built around cobalt high-speed steel for elevated heat resistance. The regular spiral and parallel web configuration support consistent chip evacuation in both through-hole and blind-hole work. No coolant-through capability means this bit relies on external coolant or dry cutting techniques depending on the application.

Key Features

• Cobalt high-speed steel construction resists heat and wear when drilling hard metals
• 135-degree split point reduces thrust and eliminates center-punch requirement
• Web-thinned parallel web improves chip clearance and reduces cutting resistance
• Screw machine length (2-11/16 inches OAL) provides enhanced rigidity over jobber-length bits
• Right-hand cutting, regular spiral flute for consistent chip evacuation
• Straight cylindrical shank fits standard 3-jaw drill chucks

Compatibility

Designed for use in standard drill chucks accepting a straight cylindrical shank. Fits drill presses, screw machines, and CNC machining setups requiring a 9/32 inch diameter screw machine length drill bit in the 0.2500 to 0.3000 inch size range.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with drill bit selection and machine tool operation. Ensure the machine is powered off and fully stopped before inserting or removing the bit from the chuck. Secure the shank fully in the chuck and verify runout before cutting. Use appropriate speeds and feeds for cobalt tooling based on the workpiece material; consult a machining reference or the machine manufacturer for recommended parameters.