Hertel 72402035 Taper Pin Reamer No. 3 Hss 6 Flutes

Product Description

The HERTEL 72402035 is a No. 3 taper pin reamer designed for enlarging, finishing, and shaping tapered holes to accept standard taper pins. Ground from high-speed steel (HSS) with a bright, uncoated finish, it delivers consistent material removal in ferrous and non-ferrous workpieces. The tool features 6 spiral flutes with a left-hand spiral direction and right-hand cutting action, which helps pull chips away from the cutting edge during operation. Small end diameter measures 0.1813 inches, large end diameter measures 0.2294 inches, and the taper rate is 1:48. This reamer is suited for general-purpose machining environments and is installed by machinists and toolroom technicians.

This tool is used in machine shop, toolroom, and production environments where taper pin holes require precise finishing to size. Typical applications include reaming holes in shafts, hubs, and mechanical assemblies where taper pins are used to locate or lock components. The square shank provides a positive drive in standard machine holders and manual tap wrenches. Overall length is 3.6875 inches with a flute length of 2.3125 inches and a shank diameter of 0.2344 inches (15/64 inches). It is appropriate for both manual and machine reaming at controlled feed rates.

Key Features

• No. 3 taper pin size with a 1:48 taper rate for standard taper pin hole geometry
• High-speed steel construction for durability across general-purpose materials
• 6 spiral flutes with left-hand spiral and right-hand cut for efficient chip evacuation
• Bright, uncoated finish suitable for use with cutting fluid
• Square shank for positive engagement in machine holders or manual wrenches
• Small end diameter 0.1813 inches, large end diameter 0.2294 inches

Compatibility

Designed as a general-purpose No. 3 taper pin reamer for use in standard taper pin hole applications requiring a 1:48 taper rate. No specific machine or system compatibility was provided in the product data.

Installation Notes

This reamer should be operated by a qualified machinist using appropriate machine tooling or a manual tap wrench. Secure the workpiece firmly before reaming and apply cutting fluid throughout the operation to extend tool life and improve finish quality. Always start from the small end of the tapered hole and advance the reamer gradually to maintain dimensional accuracy. Inspect the hole diameter at both ends after reaming to confirm proper taper pin fit before assembly.