Sumitomo 5UHY056 Screw Machine Drill Bit 0.2953 in Carbide

Product Description

The SUMITOMO 5UHY056 is a screw machine length drill bit designed for high-precision drilling in cast iron and steel applications. Built from solid carbide with a coated finish, this bit delivers the wear resistance and edge retention required in production machining environments. It measures 0.2953 inches (7.50 mm) in diameter with an overall length of 3.0709 inches (78.00 mm). The 135-degree drill point angle reduces thrust force and improves centering accuracy on hard materials. With two flutes and a tapered web configuration, it clears chips efficiently in short-depth drilling cycles. Licensed machinists and CNC operators are the typical end users for this tool.

This drill bit is suited for use on CNC machining centers, drill presses, and automated production lines where short, rigid tooling is required. The screw machine length profile provides added stiffness compared to jobber-length bits, making it well matched for drilling cast iron and steel workpieces in tight fixture setups or close-tolerance applications. The straight-cylindrical shank with an 8.00 mm (0.3150 inch) diameter seats securely in standard collet chucks and drill chucks within the compatible size range.

Key Features

• Solid carbide construction for extended tool life in ferrous materials
• 135-degree split point reduces walking and lowers drilling thrust
• Screw machine length design provides rigidity in short-reach setups
• Tapered web configuration supports efficient chip evacuation
• Straight-cylindrical shank compatible with standard collet and drill chuck systems
• h8 diameter tolerance ensures consistent, repeatable fit in tight-tolerance bores

Compatibility

Designed for use in applications requiring a drill bit in the 0.2500 to 0.3000 inch (6.50 to 8.00 mm) diameter range. Primary workpiece materials are cast iron and steel. Part of the SUMITOMO MDW-GS series.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and machine power isolated. Secure the straight-cylindrical shank firmly in a properly sized collet or drill chuck before operation. Follow the machine tool manufacturer guidelines for speed and feed rates appropriate to carbide tooling in ferrous materials. Inspect the cutting edge for chips or wear before each use and replace if the edge is damaged.