Delta 17-900 instruction manual Adjusting Spindle Return Spring, Operations

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ADJUSTING SPINDLE RETURN SPRING

The spindle is automatically returned to its upper most position upon release of the handle. It is recommended that the handle be allowed to slowly return to the top position after all holes have been drilled in the material. 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 tool from the power source.

2.Loosen the two nuts (B) Fig. 27, approximately 1/4”. Do not remove nuts (B) from shaft (C).

3.While firmly holding spring housing (A) Fig. 28, pull out housing and rotate it until the boss (D) is engaged with the next notch on the housing. Turn the housing counter-clockwise to increase and clockwise to de- crease spring tension. Then tighten the two nuts (B) to hold the housing in place. IMPORTANT: Inside nut (B) should not contact spring housing (A) when tight.

A

B

C

Fig. 27

D

B

A

Fig. 28

OPERATIONS

Your Drill Press should be used with drill bits that have shank diameters of 5/8" or less.

The following directions will give the inexperienced operator a start on common drill press operations. Use scrap material for practice to get a feel of the machine before attempting regular work. IMPORTANT: After installing a drill bit into the chuck, always tighten the jaws of the chuck using the key supplied in all three locations of the chuck, two of which are shown at (E) Fig. 30.

IMPORTANT: When the workpiece is long enough, it should always be positioned on the table with one end against the column, as shown in Fig. 30. This prevents the workpiece from rotating with the drill bit or cutting tool, causing damage to the workpiece or personal injury to the operator. If it is not possible to support the workpiece against the column, the workpiece should always be fastened to the table using clamps or a vise.

E

E

Fig. 30

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Contents 16½ Floor Model Drill Press Always Wear EYE Protection Safety RulesAdditional Safety Rules For Drill Presses Unpacking and Cleaning Assembly Changing Spindle Speeds and Adjusting Belt Tension Permanent Mounting Fastening Drill Press Base to a Supporting SurfacePower Connections Connecting Tool to Power SourceMotor Specifications Grounding InstructionsExtension Cords Table Adjustments Locking Switch in the OFF PositionStarting and Stopping Drill Press Spindle Speeds Drilling Holes To Depth Changing Spindle Speeds Adjusting Belt TensionOperations Adjusting Spindle Return SpringBoring in Wood Installing and Removing Drill BitsDrilling Metal Page Accessories