Value Collection ST0240120 Chucking Reamer 1-5/16 in Hss

Product Description

The VALUE COLLECTION ST0240120 is a high-speed steel (HSS) chucking reamer designed to finish-ream drilled or bored holes to precise tolerances. Built with a 4MT Morse taper shank, it seats securely in compatible machine spindles and tailstocks without slipping under load. The reamer measures 1.3125 inches in diameter and 11.5 inches in overall length, with a 3-inch spiral flute section that clears chips efficiently during through-hole and blind-hole operations. Ten right-hand flutes provide a smooth, consistent finish on the bore wall. The bright, uncoated HSS construction handles a wide range of ferrous and non-ferrous workpiece materials in typical shop conditions.

This chucking reamer is suited for machine shop, maintenance, and toolroom applications where hole diameter and surface finish accuracy are critical. It is driven by a lathe tailstock, drill press, or milling machine equipped with a No. 4 Morse taper socket or adapter. Typical use cases include sizing bearing bores, pin holes, and precision fit holes in metal components. It is installed and operated by machinists, tool-and-die makers, and maintenance technicians working to close-tolerance hole specifications.

Key Features

• 1.3125 inch (1-5/16 inch) reamer diameter for precision bore sizing
• 10 right-hand spiral flutes for smooth chip evacuation and consistent finish
• No. 4 Morse taper (4MT) shank seats directly in compatible machine spindles and tailstocks
• 11.5-inch overall length with 3-inch flute length accommodates standard bore depths
• High-speed steel (HSS) construction provides durability across ferrous and non-ferrous materials
• Bright, uncoated finish suitable for use with cutting fluid or dry in appropriate applications

Compatibility

Designed for use in lathes, drill presses, and milling machines fitted with a No. 4 Morse taper (4MT) spindle or tailstock socket. An adapter sleeve is required when mounting in spindles with a different taper designation.

Installation Notes

Chucking reamers are installed and operated by qualified machinists or maintenance technicians. Power down and lock out the machine before seating or removing the taper shank. Clean the taper socket and shank of chips, oil, and debris before insertion to ensure full seating and prevent runout. Always use an appropriate cutting fluid for the workpiece material, and never exceed the recommended speed and feed for the reamer diameter and material combination.