For Machines Mfg. Since 3/11

M A I N T E N A N C E

16-Speed Gearhead Lathe

To prepare your machine for long-term storage (a year or more):

1.Run the lathe and bring all gearboxes to operating temperature, then drain and refill them with clean oil.

2.Pump out the old coolant, and remove and blow out lines with compressed air and a few drops of way oil.

3.DISCONNECT LATHE FROM POWER!

4.Thoroughly clean all unpainted, bare metal surfaces, then apply a liberal coat of way oil, heavy grease, or rust preventative. Take care to ensure these surfaces are completely covered but that the rust preventative or grease is kept off of painted surfaces.

5.Lubricate the machine as outlined in the lubrication section. Be sure to use the oil gun to purge all ball oilers and oil passages with fresh oil.

6.Loosen or remove machine belts so they do not become stretched during the storage period. (Be sure to place a maintenance note near the power button as a reminder that the belts have been loosened or removed.)

7.Place a few moisture absorbing desiccant packs inside of the electrical box.

8.Cover the lathe and place it in a dry area that is out of direct sunlight and away from hazardous fumes, paint, solvents, or gas. Fumes and sunlight can bleach or discolor paint and make the chuck guard cloudy.

9.Every few months, by hand rotate all gear- driven components a few times in several gear selections. This will keep the bearings, bushings, gears, and shafts well lubricated and protected from corrosion—especially during the winter months.

Slide the carriage, micrometer stop, tailstock, and steady rest down the lathe bed to make sure that way spotting is not beginning to occur.

Backlash Adjustment

Backlash is the amount of free play felt while changing rotation directions with the handwheel. This can be adjusted on the compound rest

and cross slide leadscrews. Before beginning any adjustment, make sure that all associated components have been cleaned and lubricated.

Reducing backlash to less than 0.002" is impractical and can lead to accelerated wear of the wedge, nut, and leadscrew. Avoid the temptation to overtighten the backlash set screw while adjusting.

Compound Rest

 

Tools Needed:

Qty

Hex Wrench 3mm

1

The compound rest backlash is adjusted by tightening the set screws shown in Figure

121. When these screws are adjusted against the leadscrew nut, they offset part of the nut to remove play between the nut and leadscrew.

Set Screws

Figure 121. Compound rest backlash adjustment set

screws.

To adjust the backlash, rock the handwheel back- and-forth, and tighten the screws slowly until the backlash is approximately 0.002"–0.003", as indicated on the handwheel dial.

If you end up adjusting the nut too tight, loosen the set screws, tap the compound rest a few times with a rubber or wooden mallet, and turn the handwheel slowly back-and-forth until it moves freely, then try again.

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Southbend SB1053 owner manual Backlash Adjustment, Compound Rest