subject: On The Precision Use Of A Grinder Saw [print this page] One of the most important parts of an Angle grinder is grinder saw or the disc which helps in removing excess material or simply cut in to pieces. The various kinds of discs which help in achieving this are abrasive grinding discs, cut-off discs (diamond blade), grinding stones, wire brush wheels, sanding discs and polishing pads.
The two major grinder parts are the saw and the motor. The choice of right grinder is based on the size and strength of the grinder saw. Grinding discs serve different functions depending on their backing, coat, and abrasive material.
For paint removal and fiberglass grinding, an open coat with durable fiber backing saw is used. Closed coat saw are made of aluminum oxide and fiber-backed, typically used for fiberglass, wood, and metal sanding. Fiber Discs are alumina zirconium mineral-based. Sharp, strong, and versatile, offer supreme debarring, weld grinding and blending, and metal removal.
Disc size increases with the corresponding increase in the power. Disc sizes could be one of the following; 4, 4.5, 5, 6, 7, 9 and 12 inches.
Careful engineering is done to the Grinder parts so that instrument functions best. The circular grinder saw must be positioned properly so that they operate well even when the saw rotates at its maximum speed. Due to centrifugal force, the circular motion may be disturbed and the disc may create problems with accelerating from the same centre point. The tension with which the disc is hammered is higher for a saw that is run at higher speed than one operated at slower speed. Hence during the design of the saw, the end user and the grinder to which it is going to be hammered is decided.
As every machinery parts, the size of saw also reduces when they are used repeatedly. To avoid this, grinder parts include inserted tooth blades. An added advantage is that they allow easy repair as they eliminate the need to regrind the gullets and swage the teeth.
Sharpening of these saw provides re usability and precise output. It is done manually like filing by hand or using some specific gadgets. The way they are sharpened depends on the amount of sharpness and material they are used with. Cutting is done by the teeth on the edge of the thin blade.
Some of the characteristics of the grinder saw are that the cuts are straight and relatively accurate. There could be some blurs left on the cutting surface by the saw. But mostly likely they have a good surface finish. Cutting is done by the teeth on the edge of the thin blade.
