Grizzly owner manual Side Front View, Change gear. G9249 12 x 37 Belt Drive Gap Bed Lathe

7.Select the replacement gears as directed by the feed rate or threading chart (see Figure 56 for an example of positioning).

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View			View
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Figure 56. Change gear configuration example.

8.With the flange of the gear pointing away from the headstock (see Figure 57), align the keyway of the top change gear with the shaft key, then completely seat the gear on the shaft. Secure it in place with the flat washer and hex nut. DO NOT overtighten.

9.Mount the bottom change gear in a similar manner as the top change gear, and secure it in place with the flat washer and cap screw. However, you must choose the correct orien- tation of the gear flange.

—If the bottom change gear will engage the 127T (larger) middle change gear, point the gear flange away from the headstock.

—If the bottom change gear will engage the 120T (smaller) middle change gear, point the gear flange toward the headstock.

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Figure 57. Change gear. G9249  12" x 37" Belt Drive Gap Bed Lathe

NOTICE

For smooth operation and to reduce wear of the change gears, always make sure to clean away debris and built-up grime, then apply a light film of multi-purpose gear grease to the gear teeth.

10.Swing the pivot bracket up to mesh the middle change gears with the top and bottom change gears.

Note: It may be necessary to re-position the middle change gears on the pivot bracket to properly mesh with the top and bottom gears.

11.Make sure there is a backlash of 0.002"–0.003" between the gears, then tighten the middle change gear hex nut and the pivot bracket hex nut.

Note: Setting the gears too tight will cause excessive wear and noise. Setting the gears too loose may cause slippage and gear tooth breakage.

12.Close and secure the change gear door before beginning operations.

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