Delta Drill Manual: Optimizing Speed and Belt Tension Settings for the 11-985 Model

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CHANGING SPEEDS AND ADJUSTING BELT TENSION

1.Disconnect the drill press from the power source.

2.Lift up the belt and pulley guard (A) Fig. 23.

3.Release belt tension by loosening tension lock knob

(B) Fig. 23, and pivoting the motor toward the front of the drill press, as shown.

4.While holding the motor toward the front of the drill press head, position the belt (C) on the desired steps of the motor and spindle pulleys, as shown in Fig. 23. A belt positioning and drill speed chart (D) is provided on the inside top cover of the drill press for your convenience.

5.After the belt is positioned on the desired steps of the motor and spindle pulleys, pivot motor away from the drill press head until the belt is properly tensioned and tighten tension lock knob (B) Fig. 24. The belt should be just tight enough to prevent slipping. Excessive tension will reduce the life of the belt, pulleys and bearings. Correct tension is obtained when the belt

(C) can be flexed about one inch out of the line midway between the pulleys using light finger pressure.

SWITCH

The switch (A) Fig. 25, is located on the front of the drill press head. To turn the drill press "ON" move the switch to the up position. To turn the drill press "OFF" move the switch to the down position.

A

D

C

B

Fig. 23

C

B

Fig. 24

A

Fig. 25

LOCKING SWITCH IN

THE "OFF" POSITION

When the tool is not in use, the switch should be locked in the “OFF” position. This can be done by grasping the switch toggle (B) and pulling it out of the switch, as shown in Fig. 26. With the switch toggle (B) removed, the switch will not operate. However, should the switch toggle be removed while the drill press is operating, the switch can be turned "OFF" once, but cannot be restarted without inserting the switch toggle (B).

B

Fig. 26

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Contents Bench Drill Press Always Wear EYE Protection Safety RulesAdditional Safety Rules For Drill Presses Unpacking Assembling the Drill Press CleaningScrew D Being Careful not to Overtighten Page Fastening Drill Press to Supporting Surface Motor Specifications and Electrical RequirementsGrounding Instructions Power ConnectionsExtension Cords Correct Drilling Speeds Belt Positioning Speed ChartSpindle Speeds Locking Switch OFF Position Changing Speeds and Adjusting Belt TensionSwitch Table Adjustments Operation Adjusting Spindle Return SpringDrilling Holes to Depth Drilling Metal Boring in Wood