Cleveland C24285 Taper Pin Reamer No. 9 Hss

Product Description

The CLEVELAND C24285 is a No. 9 taper pin reamer designed for enlarging, finishing, and shaping tapered holes to precise dimensional tolerances. Built from high-speed steel (HSS), it delivers consistent cutting performance across cast iron, steel, and steel alloy workpieces. The reamer features a 1:48 taper rate with a 0.4805-inch small end diameter and a 0.6066-inch large end diameter, making it suitable for standard No. 9 taper pin applications. Six spiral flutes with a left-hand spiral and right-hand cutting direction provide smooth chip evacuation and reduced chatter during the reaming pass. The bright, uncoated finish is appropriate for general-purpose shop use.

This reamer is used in machine shops, maintenance facilities, and fabrication environments where taper pin holes must be accurately sized or refinished. Typical applications include fitting taper pins in shaft and hub assemblies, machine tool components, and structural connections that require a precise interference fit. The square shank accommodates standard tap wrench and drill press chuck setups, and the 6.0625-inch flute length provides adequate engagement depth for through-hole and blind-hole taper reaming on medium to large workpiece sections.

Key Features

• No. 9 taper pin size with a 1:48 taper rate for standard taper pin fitment
• High-speed steel construction for general-purpose cutting in steel, steel alloy, and cast iron
• Six left-hand spiral flutes promote smooth chip flow and reduced tool deflection
• Right-hand cutting direction compatible with standard manual and machine-driven operation
• Square shank for positive drive in tap wrenches or drill press chucks
• Bright, uncoated finish suitable for use with cutting oils and coolants

Compatibility

Designed for use in standard No. 9 taper pin reaming applications on cast iron, steel, and steel alloy workpieces where a 1:48 taper rate is specified.

Installation Notes

Taper pin reamers are typically operated by machinists or maintenance technicians using a tap wrench for hand reaming or a drill press at reduced spindle speed. Secure the workpiece firmly before beginning the reaming pass, and apply a suitable cutting oil to reduce heat and extend tool life. Advance the reamer steadily without forcing to avoid deflection or bell-mouthing the hole entrance. Inspect the finished hole with the corresponding taper pin gauge or pin fit before assembly.