Precision Twist Drill 5010640 Hss Chucking Reamer 5/16 in

Product Description

The PRECISION TWIST DRILL 5010640 is a high-speed steel (HSS) chucking reamer with a straight flute design, built for precision hole finishing in metal fabrication and machining applications. With a 5/16 inch diameter tip and an overall length of 6 inches, this reamer is sized for common bore finishing tasks where dimensional accuracy and surface finish matter. HSS construction provides the hardness and wear resistance needed for reaming ferrous and non-ferrous materials. Machinists and tool-and-die professionals rely on this style of reamer to bring drilled holes to final tolerance.

This chucking reamer is suited for use in drill presses, lathes, and CNC machining centers where a chuck-held tool is required. The straight flute geometry makes it appropriate for through-holes and shorter blind-hole applications in a shop or field machining environment. It is sold individually and is a standard fit for general metalworking, maintenance repair, and precision assembly operations requiring a finished 5/16 inch bore.

Key Features

• High-speed steel (HSS) construction for hardness and wear resistance across ferrous and non-ferrous materials
• Straight flute design suited for through-hole and short blind-hole reaming
• 5/16 inch diameter tip for standard bore finishing to close tolerance
• 6 inch overall length accommodates chuck-held setups in drill presses, lathes, and machining centers
• Lightweight at 0.05 pounds — easy to handle and tool-change quickly

Compatibility

Designed as a standard chucking reamer for use in any machine tool capable of holding a straight-shank tool, including drill presses, engine lathes, and CNC machining centers requiring a 5/16 inch finished bore.

Installation Notes

Chucking reamers should be installed by a qualified machinist or tooling technician. Ensure the spindle and workpiece are secured before operation, and always use appropriate cutting fluid for the material being reamed to extend tool life and achieve the desired surface finish. Never use a chucking reamer to remove excessive stock — pre-drill or bore the hole to within a few thousandths of final diameter before reaming.

Technical Specifications

• Material: High-Speed Steel (HSS)
• Tip Diameter: 5/16 inches
• Overall Length: 6 inches
• Flute Type: Straight
• Weight: 0.05 pounds
• UPC: 698464072130

Standard Information

• Brand: PRECISION TWIST DRILL
• Manufacturer Part Number: 5010640