Sumitomo U101192 Screw Machine Drill Bit 33/64 Solid Carbide

Product Description

The SUMITOMO U101192 is a screw machine length drill bit designed for high-performance drilling in demanding industrial and machining applications. Built from solid carbide with a coated finish, this bit measures 0.5156 inches (33/64 inch) in diameter and features a 135-degree split point angle for fast, accurate starts without center-punching. The overall length is 3.9370 inches, with a flute length of 1.9291 inches and a straight-cylindrical shank. It carries a 2xD flute-by-diameter ratio and an h8 diameter tolerance, making it suitable for precision work where hole accuracy is critical. Machinists and tooling specialists are the primary installers of this bit.

The U101192 is intended for use in CNC machining centers, drill presses, and screw machine setups where compact cutting length and rigidity are required. It is rated for primary workpiece materials including cast iron and steel. The screw machine length designation means the bit is shorter than jobber length, providing added rigidity and reduced deflection in production drilling environments. This makes it well suited for high-volume metal fabrication and component manufacturing operations.

Key Features

• Solid carbide construction for extended tool life in ferrous materials
• 135-degree drill point angle reduces thrust and improves self-centering on flat surfaces
• Coated finish enhances wear resistance and heat dissipation during cutting
• Screw machine length provides greater rigidity and less deflection compared to jobber-length bits
• Straight-cylindrical shank compatible with standard drill chucks and collet holders
• Tapered web configuration supports chip evacuation through the 1.9291-inch flute length

Compatibility

Designed as an OEM-style replacement for solid carbide screw machine length drill bits used in standard drill chucks and collet toolholders accepting a straight-cylindrical shank in the 0.5000 to 0.6000 inch diameter range, consistent with MDW-GS series specifications.

Installation Notes

This bit is installed by machinists or tooling technicians on CNC machining centers or drill presses. Ensure the machine spindle and toolholder are powered down and locked out before changing tooling. Secure the straight shank fully within the collet or chuck to the manufacturer-specified engagement depth before operation. Solid carbide tooling is brittle and should not be subjected to side loads or intermittent cutting conditions outside its rated application.