Grizzly g0669X owner manual Adjusting Backlash, To adjust leadscrew backlash

Adjusting Backlash

Leadscrew backlash is the amount of motion the leadscrew rotates before the device begins to move. Leadscrews always have a certain amount of backlash that will increase with wear. Generally, 0.005"–0.010" of backlash is acceptable.

Tools Needed	Qty
T-Handle Hex Wrench 5mm	............................... 1
Hex Wrench 8mm	1
Wrench or Socket 19mm	1

To adjust leadscrew backlash:

1.DISCONNECT THE MILL FROM POWER!

2.Remove the front way cover.

3.Move the table and saddle all the way for- ward, then remove the ball handle.

4.Remove the four cap screws shown in Figure 65 that hold the bearing housing to the sad- dle.

	Bearing Housing
Cap	Cap
Screws
	Screws
	Graduated Dial Assembly

Figure 65. Cross feed graduated dial assembly and bearing housing with ball handle removed.

5.Slide the graduated dial assembly off the leadscrew, then remove the key from the end of the leadscrew.

6.Carefully loosen the bearing housing from the alignment pins, then remove it from the leadscrew (see Figure 66).

Note: If you need to pry the bearing hous- ing loose, do so carefully and evenly from all sides to avoid damaging the bearing and leadscrew.

Alignment Pins

Bearing

HousingWay Cover

Mounting

Flange

Figure 66. Cross feed bearing housing and

alignment pins.

G0669X Precision 10" x 54" VS Milling Machine -47-