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Hand reamers, machine reamers and taper pin reamers

Within cutting tools reaming is the last operation on a drilled hole. The reamer takes off a few hundredths and leaves a hole at the right diameter, with a smooth wall and a tolerance a drill alone never reaches. H7 is the usual fit for dowel pins and bearing seats.

The tool follows the method. A hand reamer is turned with a tap wrench and has a lead that lets it find the hole itself, which suits one-offs and assembly work. A machine reamer belongs in the spindle or the pillar drill and works faster, provided hole and reamer are properly aligned. Shell reamers sit on a separate holder, which keeps the larger diameters affordable. A taper pin reamer is conical and cuts the tapered hole for a pin.

An adjustable reamer covers a range instead of one fixed size, for example 24 to 27.5 mm, and is meant for repair and maintenance where the size is not known in advance. HSS versions to DIN 206-B are the standard for steel. Always keep turning in the cutting direction, including on the way out, or you damage the cutting edges. Cut threads afterwards under threading.

Category Hand reamer Hand reamer
Category Machine reamer Machine reamer
Category Shell reamer Shell reamer
Category Pin reamer Pin reamer
Category Adjustable reamer Adjustable reamer
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