Grizzly G0756 owner manual Spindle Break-In, To perform the spindle break-in procedure

Spindle Break-In

Before subjecting the spindle to operational loads, it is essential to complete the break-in process. This helps ensure maximum life of spindle bear- ings and other precision components by thor- oughly lubricating them before placing them under load.

After spindle break-in is complete, we recommend changing headstock and gearbox oil to remove any metal particles or debris that are present from the assembly and break-in process.

The break-in must be performed in succession with the Test Run procedure described in this manual, as the steps in that procedure prepare the drill press for the break-in process.

DO NOT perform this procedure indepen- dently of the Test Run section. The drill press could be seriously damaged if the controls are set differently than instructed in that section.

Model G0756 (Mfg. Since 2/13)

To perform the spindle break-in procedure:

1. Move the drilling & tapping switch to the drill- ing position (see Figure 15).

Drilling and

Tapping

Switch

Spindle

Start Button

Figure 15. Drilling/tapping switch.

2.Position the speed control levers for 440 RPM.

3.Press the spindle start button.

4.Allow the machine to run for 10 minutes.

5.Press the spindle stop button.

6.Position the speed control levers for 870 RPM, and allow machine to run for 10 min- utes.

7. Press the OFF button, and adjust the speed control levers for 440 RPM.`

8.Press the spindle start button.

9. Press the button on the end of the downfeed handle to reverse spindle rotation.

10. Run the machine at 440 RPM and then 870 RPM for 10 minutes each, as described above.

11.Run the machine at 440 RPM for another 15 minutes to allow it cool down.

Congratulations! Spindle break-in is complete. We recommend changing the headstock and gearbox oil before operating the machine further (refer to lubrication on Page 33).

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