Selçuk TEVRÜZ, 030070128, 7th week

Torque Wrench (March 24, 2011 - 01:08)

Torque wrenches are precise instruments that measure the twist exerted on a nut or fastener as it is tightened. The twist-or torque-is measured in pounds of pull per inch or foot of lever arm. One pound pull on a one-foot-long handle equals one foot-pound of torque. Torque is related to the tension-or straight pull-on the bolt.

(Popular science, July 1964, pg.78)

Rotary Milling (March 24, 2011 - 01:18)

The term rotary milling is applied to a machine having a work-holding table which operates with a rotary feeding movement. Castings or forgings which are so shaped as to be readily clamped or released from a fixture are sometimes milled by a continuous rotary milling operation. The rotary milling machine may be designed along the lines of a vertical milling machine, but it is intended for milling large quantities of duplicate parts. The castings or forgings to be milled are held in a fixture near the edge of the table and, as the latter revolves, one piece after another passes beneath the revolving cutter and is milled or faced. As the finished parts come around to the front of the machine, they are removed by the operator and replaced by rough pieces without stopping the machine, so that the milling operation is practically continuous. A fixture for continuous rotary milling must be designed so that the work can be removed quickly and without stopping the rotation of the table.

(Jones F.D., Machine shop training course, 5th edition, pg.125,126)

Turnbuckle (March 24, 2011 - 01:27)

A turnbuckle assembly is a mechanical screw device that consists of two threaded terminals and a threaded barrel.

Turnbuckles are fitted in the cable assembly for the purpose of making minor adjustments in the cable tension. One of the terminals has right-handed threads and the other has the left-handed threads. The barrel has matching right- and left-handed internal threads. The end of the barrel with the left-handed threads can usually be identified by a groove or knurl around that end of the barrel.

(Reithmaier L., Reithmeier L.W., Standard aircraft handbook for mechanics and technicians, 6th edition, pg.189)

Bow-End Wrench (March 24, 2011 - 01:38)

The end of the bow-end wrench is boxed or closed rather than open. The jaws of the wrench fit completely around a bolt or nut, gripping each point on the fasteners. The bow-end wrench is not likely to slip off a nut or bolt. It is safer than an open-end wrench. Box-end wrenches are as 6 point and 12 point. The 6-point bow end grips the screw more securely than a 12-point box-end wrench can and avoids damage to the bolt head.

(Erjavec J., Automotive technology: a systems approach, 4th edition, pg.97)