1/4-28 Thread Reamer, .3400 Diameter, 0.3240 Pilot, HSS, 2'' OAL, RMA2S340U324Z2

Reamer, 1/4-28 Thread, 0.3400, HSS, Piloted, 2'' OAL Description

VERY LIMITED QUANTITY ITEM! Reamers are used throughout the industry to improve the dimensional precision and wall finish of the inside of holes prior to fastener installation. This becomes critically important in aircraft work, especially for interference fit fasteners where closely controlled dimensions are crucial. Reamers are frequently employed to enlarge or ''finish'' holes. Piloted reamers are particularly useful for maintaining the concentricity of the reamed hole with a pilot hole, or when enlarging a hole for an oversized fastener.

As with Threaded Shank Drills, Threaded Shank Reamers allow access where straight-on access is impossible. They are available in a number of lengths, with or without pilots. Larger diameter reamers are typically fabricated with 5/16'', 3/8'', and 7/16'' threaded bases.

They may be used in a variety of 45° and 90° angle heads, or with flat-offset ''pancake'' attachments. A portion of the tip of the reamer (the ''pilot'') is ground to the diameter of the initial hole. The reamer then centers itself on this pilot hole as it travels the length of the hole, enlarging it to the final diameter