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 grinder saw and the motor determine the overall output of the work. To get the maximum output, grinding discs which have appropriate backing, coat, and abrasive material should be carefully chosen.
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.
The disc size is directly proportional to the power. Most common disc sizes are: 4, 4.5, 5, 6, 7, 9 and 12 inches.
Geometric setting is done to the grinder parts so that instrument functions best. The circular grinder saw must be tensioned to properly operate because when the saw comes to speed, the rim stretches due to centrifugal force. If they are not properly inserted, the saw will not move perfectly. They may move like a sauce pan ride. A saw that is to be run at higher speed will have to have more tension than one operated at slower speed. Hence while hammering the saw, the RPM to which it is going to be used and the power of the grinder should be well informed.
The grinder parts include inserted tooth blades which allow easy repair as they eliminate the need to regrind the gullets and swage the teeth. Also inserted tooth saw doesn't reduce in size as time goes by.
Sharpening of these saw is usually done periodically to have a precise cutting edge. It could be done manually like filing by hand or using some specific gadgets. Manual or machinery methods depend on the amount of sharpness required and material they are used with. Cutting is done by the teeth on the edge of the thin blade.
The grinder saw shows some marvelous characteristics such as straight and accurate cuts. Though there could be some blurs left on the cutting surface by the saw, mostly they have a good surface finish.
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