A deforming instrument having a work-engaging, work-deforming, peripheral surface which is generated by a line revolving about an axis. The roller will cyclically move into and out of contact with a work surface during deformation of the work, relative movement occurring, during deformation.
A technique which involves making progress (if done correctly) by rolling the disc along the ground rather than actually throwing it. Often useful when playing out of a rough lie with no clear flight path.
The Rollers are an Old World family of near passerine birds. They resemble crows in size and build, but are more closely related to the kingfishers and bee-eaters. They share the colourful appearance of those groups, blues and browns predominating.
The roller is an agricultural tool used for flattening land or breaking up large clumps of dirt, especially after plowing. Typically, rollers are pulled by tractors or a team of animals such as horses or oxen. The flatter land makes subsequent weed control and harvesting easier and can help to reduce moisture loss from cultivated soil.
Assembly The combination of a wheel and axle that is used to guide a door through the track system, either 2" (50.8 mm) or 3" (76.2 mm) diameter, depending on track size. Available as short or long stem.
Consists of a steel tube with bearing pressed or swaged in at both ends, and a spring loaded steel hex shaft passing through the inter race of the bearing. Size of the roller, shaft and the type of bearing used is dependent upon the type of application.
In mechanical action, the keys are directly in front of the pipes and wind chest so the connection between the key and valve follows straight lines and right angles. Sometimes the architecture and space available necessitate the placing of the pipes off to the side. Then the connection must follow straight lines at irregular angles. The roller, a wooden rod, is used in this circumstance as its rotation can accommodate the irregular angles. It has two arms at each end. One is attached to the key (or pedal) and the other is attached to the valve directly, or trackers which lead to the valve. The roller mechanism is frequently used in the pedal division and is only found in mechanical action instruments. Return to Beginning