Value Collection ST09MTM4 4MT Morse Taper Reamer Hss

Product Description

The VALUE COLLECTION ST09MTM4 is a 4MT Morse taper reamer designed to finish-ream tapered bores to precise dimensional tolerances. Straight flutes cut in a right-hand direction, making this tool suitable for machine spindle work where a smooth, accurate taper seat is required. The small end diameter measures 1.0167 inches and the large end diameter measures 1.2893 inches, with an overall length of 10.875 inches and a flute length of 5.25 inches. Constructed from high-speed steel with a bright, uncoated finish, this reamer delivers consistent cutting performance in standard machine shop and maintenance applications.

This reamer is suited for finishing or enlarging 4MT Morse taper sockets in drill press tables, lathe tailstocks, milling machine spindles, and similar machine tool components. It is appropriate for job shop machinists, tool-and-die work, and maintenance technicians refurbishing worn or damaged taper bores. The 1.125-inch tapered shank seats directly into a compatible taper holder or adapter for rigid setup on manual or CNC equipment.

Key Features

• 4MT Morse taper profile for finishing standard No. 4 Morse taper bores
• Small end diameter: 1.0167 inches; large end diameter: 1.2893 inches
• Straight flute geometry with right-hand cutting direction
• High-speed steel construction for wear resistance across a range of workpiece materials
• Bright, uncoated finish — no coating to affect dimensional tolerances
• Overall length of 10.875 inches with a 5.25-inch flute length

Compatibility

Designed as an OEM-style replacement or stock reamer for any application requiring a No. 4 Morse taper bore finish to standard 4MT dimensional specifications.

Installation Notes

This tool is installed and operated by machinists and tool-and-die technicians using a lathe, drill press, or milling machine with an appropriate taper adapter. Always power down and lock out the machine before mounting or removing the reamer. Use cutting fluid appropriate to the workpiece material to extend tool life and improve bore finish. Do not force the reamer through an undersized bore in a single pass; approach final dimension in light, progressive cuts.