Table Lift Screws

Tools Needed:

Qty

Hex Wrench 8mm

1

Wrench/Socket 14mm

1

Flat Head Screwdriver

1

Chalk, white-out, or paint

1

The table lift screws are connected by a chain and driven by the table elevation handwheel. When the chain is removed from a sprocket on one of the lift screws, that lift screw can adjust that portion of the table up/down independently to assist in setting the table parallel to the drums.

Adjusting the table lift screws will only be neces- sary if you need to adjust the drum heights more than allowed at the pillow bearing adjustments, or if you have removed the table or chain during a service procedure and you need to reset the drums parallel to the table.

Each tooth on the sprocket represents 0.006" or

.16mm of table elevation movement. For example, if the rear of the table was 0.006" low, rotate both rear table lift screws to the next sprocket tooth in the same chain position. You can easily rotate the sprockets from the top of the table lift screws with a flat head screwdriver.

To adjust the table lift screws:

1.Disconnect power to the sander!

2.Open the side cover.

3.Raise the table up to at least the 1" mark on the height scale.

4.At the lift screw that needs to be adjusted, mark the end of a sprocket tooth and the chain hole where that tooth is meshed, as shown in Figure 42.

NOTICE

Marking the chain and sprocket locations will save you a substantial amount of time when you reinstall the chain. Make sure you have done this before removing the chain.

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Figure 42. Marking sprocket tooth and chain.

5.Loosen the chain with the adjustable idler roller sprocket shown in Figure 43.

Figure 43. Adjustable idler roller sprocket.

6.Carefully move the chain off of only the marked sprocket.

7.Keep track of the marked chain hole and rotate the sprocket the necessary number of teeth away from the marked one to meet the difference in height needed.

8.Fit the chain back over the sprocket, making sure the new sprocket tooth is inserted into the marked chain hole.

9.Re-tension the chain and check the new height setting.

10.Repeat Steps 5–9as needed until the table height is parallel to the drums in all four cor- ners, and calibrate the scale pointer.

G0449/G0450 37" Drum Sander

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Grizzly G0450 instruction manual Table Lift Screws