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Each thread stays on the same side of the material being sewn, interlacing with the other thread at each needle hole thanks to the machine's movement. [12] Tension of the bobbin thread is maintained with a bobbin case, a metal enclosure with a leaf spring which keeps the thread taut. The bobbin case has to be free-floating (not attached to an ...
It is important to determine the type of finish of a wood floor and always treat it in the proper manner, for instance it is difficult to clear wood floor wax from a floor coated with polyurethane. Simple cleaning instructions: [8] Clear the floor of any furniture that is easy to move. Sweep or vacuum all loose dirt and debris.
A vibrating shuttle is a bobbin driver design used in home lockstitch sewing machines during the second half of the 19th century and the first half of the 20th century. It supplanted earlier transverse shuttle designs, but was itself supplanted by rotating shuttle designs.
Vibratory finishing is a type of mass finishing manufacturing process used to deburr, radius, descale, burnish, clean, and brighten a large number of relatively small workpieces. [ 1 ] In this batch-type operation, specially shaped pellets of media and the workpieces are placed into the tub of a vibratory tumbler.
A spring pin (also called tension pin or roll pin) is a mechanical fastener that secures the position of two or more parts of a machine relative to each other. Spring pins have a body diameter which is larger than the diameter of the hole they are intended for, and a chamfer on either one or both ends to facilitate starting the pin into the hole.
The upper thread runs from a spool kept on a spindle on top of or next to the machine, through a tension mechanism, through the take-up arm, and finally through the hole in the needle. Meanwhile, the lower thread is wound onto a bobbin, which is inserted into a case in the lower section of the machine below the material.
A floor scrubber. A floor scrubber is a floor cleaning device. It can be a simple tool such as a floor mop or floor brush, or in the form of a walk-behind or a ride-on machine to clean larger areas by injecting water with cleaning solution, scrubbing, and lifting the residue off the floor.
A buffing machine is used also in the final stages of wood floor refinishing. This is a rotary machine with attached fine abrasives which helps remove differences between the vertical and horizontal circulations of the sanding drums and the disk of the edging machines.