Return Spring, Quill, To adjust the spring tension

Return Spring

The spring’s tail is located on the perim- eter of the spring housing. This part may be sharp! Use leather gloves or a heavy shop towel to cover the tail while loading or unloading return spring pressure. Failure to use such precautions may result in per- sonal injury.

The spring tension for automatic quill recoil has been pre-set at the factory. It should not need adjustment under most normal circumstances. If it does need adjustment, the spring housing is located on the left side of the head.

To adjust the spring tension:

1.DISCONNECT MACHINE FROM POWER!

2.PUT ON SAFETY GLASSES!

3.Loosen the black thumb knob two or three turns (Figure 41).

4.Put on gloves and pull the spring cover out enough so the notches just clear the roll pin. Hold the spring cover tightly or the force of the spring will spin it out of your hands.

5.Rotate the cover to adjust the tension. Push the cover back in to engage the roll pin in one of the notches (Figure 42).

Notch

Figure 42. Adjusting spring tension.

6.Tighten the black thumb knob.

Quill

Spring Cover

Thumb Knob

Roll Pin

The internal quill pin is a set screw and has been pre-adjusted at the factory. It should not need adjustment under normal circumstances.

The slotted set screw on the left side of the head is used for limiting the amount of rotational play in the quill body. Loosening the check-nut and tightening the set screw reduces this play in the quill.

Figure 41. Spring cover.

Do not completely remove the cover! If you remove the spring cover, the spring will uncoil rapidly and create a great risk of injury.

G3358 Milling/Drilling Machine

If you are worried that you might have excessive quill play, spindle looseness or if an accident has occurred that requires re-adjusting this set screw, contact Technical Support for advice on how to perform this service properly.

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