Precision Twist Drill 5110004 Hss End Mill 4 Flute 5/16 in

Product Description

The PRECISION TWIST DRILL 5110004 is a high-speed steel (HSS) end mill designed for general-purpose milling, slotting, and profiling operations in metal fabrication and machining environments. Built with a 4-flute geometry and a Weldon shank, this end mill delivers stable cutting performance and reliable tool holding in standard milling chucks. The 5/16 inch cutting diameter makes it well suited for light to medium material removal in steel, aluminum, and similar materials. At 2.5 inches in overall length, the tool fits conventional vertical and horizontal milling setups without excessive overhang.

This end mill is used in machine shops, maintenance facilities, and light manufacturing applications where precise slot milling, peripheral milling, and contour work are required. The Weldon shank flat resists pull-out under load, making it a practical choice for production runs and repetitive cutting tasks. It is sold individually and is appropriate for use in manual knee mills and CNC milling machines configured for end mill tooling.

Key Features

• High-speed steel (HSS) construction for toughness and wear resistance across a range of workpiece materials
• 4-flute design improves surface finish and supports higher feed rates compared to 2-flute end mills
• Weldon shank with flat resists rotational slippage in set-screw tool holders
• 5/16 inch cutting diameter suited for slot and profile milling in light to medium-duty applications
• 2.5 inch overall length provides adequate reach while maintaining rigidity

Compatibility

Designed as a standard Weldon shank end mill compatible with set-screw style end mill holders sized for 5/16 inch shank tooling used in manual and CNC vertical milling machines.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the milling machine spindle is fully stopped and the machine is powered down before loading or removing tooling. Seat the Weldon shank fully into the holder and tighten the set screw against the flat to prevent pull-out during cutting. Inspect the cutting edges for damage before each use and follow the machine manufacturer guidelines for spindle speed and feed rate selection.

Technical Specifications

• Material: High-Speed Steel (HSS)
• Number of Flutes: 4
• Shank Type: Weldon
• Cutting Diameter: 5/16 inches
• Overall Length: 2.5 inches
• Weight: 0.01 pounds
• Sold As: Each

Standard Information

• Brand: PRECISION TWIST DRILL
• Manufacturer Part Number: 5110004