Model SB1023 | O P E R A T I O N | For Machines Mfg. Since 8/09 |
9.Set the wrenches aside and carefully remove the wheel and hub assembly with the hub puller still installed (Figure 27).
Figure 27. Wheel and hub removal.
10.Unthread the hub puller and set it aside.
11.Wipe the spindle and hub taper (Figure 28), so the tapers are perfectly clean. Wiping the threads and tapers with a
Hub
Taper
Spindle Taper
Figure 28. Spindle taper.
12.To install the grinding wheel and hub, complete the preceding steps in the reverse order, but skipping the steps regarding hub puller usage. After the grinding wheel and hub are installed, many machinists still choose to dress the grinding wheel. Refer to Wheel Dressing on Page 25 for details.
Wheel Inspection
Do not assume that a wheel is in sound condition just because it is
To inspect a wheel for damage:
1.Remove the wheel and look for any cracks, chips, nicks or dents in the surface of the wheel. If you see any of these, DO NOT attempt to use the wheel.
2.Do a ring test. This test will give you an indication of any internal damage that may not be obvious during a visual inspection.
3.Inspect the paper washers on both sides of the grinding wheel (Figure 29). These washers are cushions between the spacer washer and the grinding wheel seat. Without the washers, cracks can be spawned from the center of the wheel when the spanner nut is tightened. Over time, these cracks can radiate outward and the wheel may explode during operation, possibly causing injury.
Paper
Washer
Figure 29. Important paper washer.
Note: If you need to replace or install new paper washers, replacements can be cut out of any thick construction paper or card stock. Regular notebook paper or paper from a copy machine is not acceptable, as it is too thin to provide the required cushion. Be sure to transfer any RPM limitations and wheel type information.