Sumitomo U101096 Screw Machine Drill Bit 9/32 in

Product Description

The SUMITOMO U101096 is a screw machine length drill bit engineered for high-precision drilling in metalworking applications. Built from solid carbide, it delivers the hardness and wear resistance required for cutting cast iron and steel. The 135-degree split point reduces walking and allows drilling without a center punch in many setups. At 2.874 inches overall length with a 1.299-inch flute length, this stubby-format bit is well suited to CNC machining centers and drill press work where rigidity matters. It carries a straight-cylindrical shank measuring 0.2812 inches in diameter and meets h8 diameter tolerance for consistent fit in standard toolholders.

This drill bit is designed for production and maintenance machining environments where dimensional accuracy and tool life are priorities. Its screw machine length format reduces deflection compared to jobber-length bits, making it a preferred choice for drilling in tight workpiece setups or short-stroke spindles. Primary target materials are cast iron and steel. The MDW-GS series features a tapered web configuration and a 2xD flute-to-diameter ratio, supporting controlled chip evacuation in moderate-depth holes. Maximum drilling depth is 0.877 inches. Licensed machinists, tool and die makers, and CNC setup technicians are the typical end users for this tooling.

Key Features

• Solid carbide construction for superior hardness and wear resistance in ferrous materials
• 135-degree point angle reduces thrust force and minimizes drill walking on entry
• Tapered web configuration promotes controlled chip flow and reduces core buildup
• Straight-cylindrical shank at 0.2812 inches diameter fits standard collets and chucks
• h8 diameter tolerance ensures repeatable fit in precision toolholding systems
• Screw machine length format maximizes rigidity and minimizes deflection in short-reach setups

Compatibility

Designed as an OEM-style replacement and standard production drill bit for use in CNC machining centers, drill presses, and similar machine tool spindles accepting a straight-cylindrical shank. Primary workpiece materials are cast iron and steel as stated by the manufacturer.

Installation Notes

Installation and tool changes should be performed by qualified machinists with the spindle at a complete stop and machine power locked out per standard lockout/tagout procedures. Confirm collet or chuck bore matches the 0.2812-inch shank diameter before clamping. Avoid using this bit in hand-held drills where rigidity cannot be controlled. Inspect the cutting edges for chipping or wear before each use, as carbide tooling can micro-chip if mishandled or dropped.