What is a manual construction?

Hand reamer is a small hand cutting tool used to complete drilled or machined holes for the exact diameter. These tools consist of a metal shaft made of tempered alloy on steel. Along the part of the shaft length are several flute or cutting blades of the defendants in a circular pattern in a fixed diameter. The other end of the shaft is machined in a square that fits the key. Hand reameras are commonly used in machines to repair and produce high -precision machinery.

Many hand reamers are slightly tapering and chamfered at the end of the shaft because it makes it easier to insert into an existing hole. However, some hand reamers are not tapering or beveled and are used when the entire hole depth must be cured to size. When inserted into the opening, the hand reamer is slowly rotated by hand, usually using the key handle. The blades on the shaft remove only a small amount of material needed to complete the desired size.

There are two primary types of manual reamers: a fixed or adjustable diameter. The fixed diameter reamer has flute cutting that has a solid diameter and can only be used to complete the holes to this diameter. They are available in sizes from 1/16 inches (1.59 mm) to 2 inches (50.8 mm). The flutes are machined in the end of the reamer and the spinning is applied during the production process.

Adjustable hand reamer has a set of adjustable blades that run in tapered slits sliced ​​on a stem. The pun is threaded and two threaded adjustment rings are located at both ends of the blades. The cutting diameter is modified by release of one adjustment ring and by sliding the blades to the new position and then tightening the other adjusting ring. As the slots narrow, the effective diameter of the cutting changes every new settings. The range differs in size depending on the size of the manual rendering used. Are available in sizesfrom 1/4 inches (6.35 mm) to 3 11/32 inches (84.93 mm). Adjustable manual reamers are commonly used to cut out of outlook if no suitable fixed diameter is available.

Hand reamers are often used in the repair of machines and in the production of machinery requiring a high degree of accuracy. The tolerance of the holes is up to 0.0008 inches (0.02 mm) can be achieved when using hands tolerance compared to 0.003 to 0.005 inches (0.8 to 0.12 mm) when drilling. The use of hands is often used to complete the dowels or holes for pins up to size to allow disturbing the opening and dowels. If it is properly used correctly, only a very small amount of material removes at a time, usually only 0.005 to 0.008 inches (0.12 to 0.20 mm). As a result, manual performances are highly desirable for the production of high -quality surfaces on the hole surface.