Sumitomo U101169 7/16 in Solid Carbide Drill Bit Mdw-gs

Product Description

The SUMITOMO U101169 is a screw machine length drill bit designed for high-performance hole-making in ferrous and cast iron workpieces. Built from solid carbide with a coated finish, it delivers the hardness and wear resistance needed for production drilling in steel and cast iron applications. The bit measures 0.4375 inches (7/16 inch) in diameter with a 135-degree split-point angle that reduces walking and improves entry accuracy. Overall length is 3.6614 inches, and the flute length runs 1.7717 inches. The straight-cylindrical shank seats securely in standard drill chucks and collet holders. This bit is part of the MDW-GS series and is suited for machinists, toolroom technicians, and production floor operators.

The U101169 is intended for screw machine length applications where a shorter, stiffer tool body improves rigidity and reduces deflection. Primary workpiece materials are cast iron and steel. The tapered web configuration and 2xD flute-by-diameter ratio make this bit well-matched to CNC machining centers, drill presses, and turret lathes running moderate to high feed rates. Maximum drilling depth is 1.1156 inches. The h8 diameter tolerance ensures consistent fit in precision tool holders.

Key Features

• Solid carbide construction for extended tool life in ferrous materials
• 135-degree drill point angle reduces thrust and minimizes workpiece walking
• Coated finish improves surface lubricity and wear resistance
• Screw machine length body provides increased rigidity over jobber-length bits
• Straight-cylindrical shank compatible with standard drill chucks and ER collets
• Tapered web configuration supports chip evacuation in deep cuts

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide drill bit for production machining setups targeting cast iron and steel workpieces requiring a 7/16 inch diameter hole.

Installation Notes

This bit is installed by machinists or toolroom personnel in CNC machining centers, manual drill presses, or turret lathes. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the shank fully into the collet or chuck and verify runout before beginning a cut. Do not exceed the recommended maximum drilling depth of 1.1156 inches per pass without retracting to clear chips.