Draper HD25/12CF Manuel d'instructions - Page 15

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OPERATION AND USE

ADJUSTING SPINDLE RETURN SPRING

For the purpose of automatically returning the

spindle upward after the hole has been

✸✌

drilled, a spindle return spring is provided in

the spring housing ✷✌ (Fig. 20). This spring

✹✌

has been properly adjusted at the factory and

should not be disturbed unless absolutely

necessary. To adjust the return spring,

proceed as follows:

✷✌

1. Disconnect the drill press from the power

supply.

2. Loosen the nut ✸✌ slightly. Do not remove

Fig.20.

nut ✸✌ from shaft ✹✌.

3. While firmly holding spring housing ✺✌

(Fig. 21) pull out housing and rotate it until the

boss ✻✌ is engaged with the next notch on

✻✌

the housing. Turn the housing anticlockwise

✺✌

to increase and clockwise to decrease spring

tension. Then tighten the nut to hold the

housing in place.

✼✌

IMPORTANT:

Nut ✼✌ (Fig. 21) should not contact spring

housing when tight.

Fig.21.

DRILLING HOLES TO DEPTH

Fig.22.

Where holes are to be drilled to exactly the

✾✌

same depth, a depth stop is provided in the

pinion shaft housing and is used as follows:

1. Loosen lock handle ✾✌ (Fig. 22) and rotate

✿✌

housing ✽✌ until the pointer ✿✌ lines up with

the depth you wish to drill on the scale ❀✌.

Then tighten lock handle ✾✌.

❀✌

2. All holes will then be drilled to the exact

depth, as indicated on the scale.

✽✌

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