Cleveland C25475 Chucking Reamer 6 Mm Hss Straight Flute

Product Description

The CLEVELAND C25475 is a straight-flute chucking reamer designed for precision hole finishing in metal workpieces. Built from high-speed steel (HSS) with a bright, uncoated finish, it produces accurate, smooth bores in a single pass when used in a drill press, lathe, or CNC machining center. The reamer holds a 6 mm (0.2362 inch) diameter with a tolerance of +0.0001 to +0.0004 inches, making it suitable for close-tolerance fit work. Six right-hand-cut flutes deliver consistent chip evacuation and surface finish. The straight shank accepts standard drill chucks without an adapter.

This reamer is intended for machine tool applications requiring repeatable hole sizing in steel, cast iron, aluminum, and similar machinable materials. It is a standard production reamer commonly used by machinists in job shops, maintenance facilities, and manufacturing environments. With an overall length of 6 inches and a 1.5-inch flute length, it handles typical through-hole and shallow blind-hole reaming tasks in both manual and CNC setups.

Key Features

• 6 mm (0.2362 inch) reamer diameter with +0.0001 to +0.0004 inch tolerance for close-tolerance hole finishing
• High-speed steel construction provides durability across a range of machinable metals
• Bright, uncoated finish — no coating buildup to affect dimensional accuracy
• Six straight flutes with right-hand cut for smooth chip evacuation and consistent surface finish
• Straight shank fits standard drill chucks and collet holders directly
• 1.5-inch flute length suitable for through-holes and shallow blind-hole applications

Compatibility

Designed as an OEM-style machine reamer for use in drill presses, engine lathes, turret lathes, and CNC machining centers equipped with a standard straight-shank chuck or collet capable of holding a 6 mm shank.

Installation Notes

Chucking reamers are installed and operated by machinists. Always power down and lock out the machine spindle before mounting or removing the reamer from the chuck or collet. Use cutting fluid appropriate to the workpiece material to extend tool life and improve surface finish. Do not use a chucking reamer to remove more material than its tolerance range is designed to correct — pre-drill or bore the hole to within 0.005 to 0.015 inches of final size using a drill bit before reaming, following standard machining practice.