Kennametal 6781125 Screw Machine Drill Bit Size 30 Hpx

Product Description

The KENNAMETAL 6781125 is a screw machine length drill bit designed for high-productivity drilling in steel and other ferrous workpiece materials. Built from solid carbide grade KCP15B and coated with a multi-layer AlTiN and TiN finish, this bit delivers extended tool life and heat resistance under demanding cutting conditions. It carries a wire gauge Size 30 cutting diameter of 0.1285 inches (3.26 mm) with a 140-degree split-point geometry that reduces thrust and improves centering without a pilot hole. The straight cylindrical shank measures 0.2362 inches (6.00 mm) in diameter. Licensed machinists, toolroom technicians, and CNC operators are the typical end users.

This drill bit is suited to screw machine operations, CNC machining centers, and manual drill press applications where short overall length and rigid setup are priorities. The HPX series screw machine length format keeps the 2.4409-inch (62.00 mm) overall length compact, which reduces deflection and improves hole quality in production environments. The 3xD flute-to-diameter ratio and 20.00 mm flute length make it appropriate for shallow-to-moderate depth holes in steel, with a maximum drilling depth of 14.00 mm per pass. Right-hand cutting direction, regular spiral fluting, and no coolant-through design suit standard external coolant or dry cutting setups.

Key Features

• Solid carbide KCP15B grade for high hardness and wear resistance in steel applications
• Multi-layer AlTiN and TiN coating provides thermal barrier and extended tool life
• 140-degree point angle reduces entry thrust and improves self-centering
• Screw machine length (62.00 mm OAL) minimizes deflection in tight setups
• Straight cylindrical shank (6.00 mm diameter) fits standard drill chucks and collets
• 3xD flute ratio supports chip evacuation in production drilling cycles

Compatibility

Designed as an OEM-style replacement or direct tooling option for screw machine and CNC drilling applications requiring a wire gauge Size 30 solid carbide drill bit with a straight shank and 140-degree point in the HPX series.

Installation Notes

Installation and tool changes should be performed by qualified machinists or toolroom personnel with the machine at a full stop and all energy sources locked out per OSHA lockout-tagout procedures. Ensure the chuck or collet bore matches the 6.00 mm shank diameter before seating the bit. Do not exceed the manufacturer-specified maximum drilling depth of 14.00 mm per pass to avoid tool breakage. External coolant or appropriate cutting fluid for steel is recommended when machining at high feed and speed rates.