Wilton A5816 Instructions d'exploitation télécharger pdf (Page 10)

The speed control handwheel is located on the

left side of the drill head. An LED speed

indicator is provided on the face plate on the drill

head.

LED Speed

Display

On/Off Switch

Speed control

Handwheel

Depth

Stop

Figure 7 – Operating Controls

Depth Stop

A drilling depth stop (refer to Figure 8) is

provided on the right side of the drill head. The

depth stop consists of a threaded rod with depth

setting jam nuts. The front side of the threaded

rod has a depth scale. The jam nuts are

loosened and moved to the desired depth on the

scale. The upper jam nut is then tightened

against the lower nut.

Figure 8 – Depth Stop

Operating Precautions

The following operating and safety precautions

must be observed in order to avoid harm to the

operator or damage to the drill press.

1. The head assembly must be locked to the

column so the thrust produced by drilling will

not force the head assembly up the column.

2. The work table must be locked to the

column so it will not be forced down the

column.

3. Be sure the belt is tightened to the proper

tension.

4. DO NOT start to drill the workpiece until

making certain the workpiece is held down

securely.

5. BEFORE turning the speed control

handwheel in either direction.

6. Point of operation protection is required for

maximum safety. This remains the

responsibility of the user/purchaser since

conditions differ between jobs.

7. Make sure the drill is secured in the spindle

or check before attempting to use the drill

press.

8. Make sure the spindle taper is clean and

free of burrs, scoring, and galling to assure

maximum gripping.

Drilling Recommendations

Speeds for Drilling

The speed of a drill is usually measured in terms

of the rate at which the outer periphery of the

tool moves in relation to the work being drilled.

The common term for this is Surface Feet per

Minute (SFM). The relationship of SFM is

expressed in the following formulas:

)(26.0 InchesinDiameterDrillRPMSFM ××=

)(

8.3

InchesinDiameterDrill

SFM

RPM ×=

In general, the higher the speed the shorter the

drill life. Operating at the low end of the speed

range for a particular material will result in longer

life. The most efficient speed for operating a drill

depends on many variables:

1. Composition and hardness of material.

2. Depth of the hole.

3. Efficiency of the cutting fluid.

4. Type and condition of the drilling machine.

5. Desired quality of the hole.

6. Difficulty of set-up.

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Wilton A5816 Instructions d'exploitation Page 10

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