Value Collection SM25N11 Taper Pin Reamer No. 11 Hss

Product Description

The VALUE COLLECTION SM25N11 is a No. 11 taper pin reamer made from high-speed steel (HSS), designed to enlarge, finish, and shape tapered holes to precise tolerances. The reamer features a spiral flute geometry with a left-hand spiral direction and right-hand cutting direction, which helps pull chips away from the work and reduces chatter during the cut. The small end diameter measures 0.706 inches and the large end measures 0.878 inches, with a taper rate of 1:48. The bright, uncoated finish suits general-purpose reaming in a wide range of workpiece materials. Machinists and tool-and-die technicians are the primary installers of this tool.

This taper pin reamer is used in machine shops, maintenance facilities, and manufacturing environments where taper pin holes must be accurately sized or refurbished. It is suited for both production and repair applications involving tapered hole finishing in ferrous and non-ferrous materials. The 8.25-inch flute length provides adequate engagement depth for through-hole and blind-hole reaming operations on larger workpieces. The straight shank measures 0.75 inches in diameter and seats directly in a compatible drill press chuck, lathe tailstock, or manual tap wrench setup.

Key Features

• No. 11 taper pin size with a 1:48 taper rate for precise pin-hole alignment
• High-speed steel construction provides durability across general-purpose cutting applications
• Spiral flute with left-hand helix and right-hand cut reduces chatter and improves chip evacuation
• 8.25-inch flute length accommodates deeper reaming passes on larger stock
• Bright, uncoated finish — no coating buildup to affect dimensional accuracy
• Straight 0.75-inch shank fits standard drill press chucks and lathe tailstocks

Compatibility

Designed as a general-purpose taper pin reamer for No. 11 taper pin holes following standard taper pin sizing conventions. Suitable for use in drill presses, lathes, and manual reaming operations where a straight-shank tool is accepted.

Installation Notes

This tool is typically used by machinists and maintenance technicians in shop environments. Secure the workpiece firmly before reaming, and ensure the reamer is properly aligned with the existing pilot hole to avoid deflection. Apply appropriate cutting fluid to extend tool life and improve hole finish. Never force the reamer; feed with steady, controlled pressure to prevent tool breakage or hole distortion.