4.Remove the Wheel Sleeve from the back side of the wheel.
5.Take the new grinding wheel and insert the Wheel Sleeve into the bore from the back of the wheel. Most wheels will have a paper disc on each side, this helps to equalize the clamping pressure. Do not remove these discs! The Wheel Sleeve should fit snugly in the bore of the wheel. If it is too loose, do not attempt to fill the gap with any other types of material. The wheel will not main- tain proper balance. If it is too tight, do not attempt to force the wheel onto the Sleeve, as it may cause cracking of the wheel.
6.Thread the Wheel Sleeve Nut onto the opposite side of the wheel. Tighten enough to get a good seat on the sleeves against the paper discs, this helps to assure the wheel will not slip in operation. Do not over- tighten, however, as this can cause stress on the wheel.
7.Slide this assembled wheel onto the spin- dle, making sure the wheel sleeve hole and the spindle taper are clean and free of any foreign material, dents or nicks.
8.Tighten the Spindle Nut using the Pin Wrench to hold the Sleeve and the Adjustable Wrench to tighten the Nut. Do not overtighten.
9.Replace the Wheel Guard and secure with three cap screws.
10.Run the wheel at full speed for at least one minute before doing any grinding. If there is a structural problem with the wheel, it will generally occur during the initial runup.
Make certain the wheel has a tight fit on the Wheel Sleeve, and that the Sleeve Nut and Spindle Nut are properly tightened on the Spindle. Improper assembly of the grinding wheel can cause failure of the wheel which can result in a wheel breaking apart and causing injury from flying debris. Always have the Wheel Guard installed, even when test running the machine.
Wheel Balancing
The wheel and sleeve assembly should be bal- anced before mounting onto the Grinder. Generally the wheel itself will be balanced by the manufacturer. The Wheel Sleeve has Balance Weights positioned in a groove which can be moved to accomplish final balance of the assem- bly.
1.Mount the wheel on the sleeve assembly as described in the Wheel Mounting sec- tion. Position the weights so they are even- ly spaced around the groove.
2.Mount the wheel on the Balance Arbor, which has a taper the same as that on the machine spindle. Tighten the nut on the arbor to lock the wheel in place.
3.Place the arbor across two parallel, level bars so the wheel is freely suspended. The wheel will turn until the heaviest side is down. Mark the heavy side with a chalk mark.
4.Loosen the setscrew on one of the Balance Weights opposite the chalk mark, and move it so it is 180˚ opposite the chalk mark.
5.Place back on the bars and observe whether one side is still heavy. It may be necessary to repeat Steps 3 - 5 several times until the wheel is balanced. When the arbor does not roll across the bars at all, then the wheel is in balance.
6.Remove the wheel from the Balance Arbor. Make sure the Balance Weight setscrews are firmly secured. Install wheel in the grinder.
G5963 Surface Grinder
