KTC KTC16B, Owner'S Manual, Page: 38 / 88

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Owner’s Manual
Adjusting table height
See Figure 22.
1. Hold the table with one hand then loosen the table support lock handle.
2. To raise the table, turn the table crank clockwise.
3. To lower the table, turn the table crank counterclockwise.
4. Once the table is in the desired position, retighten the table support lock handle.
Changing speeds
The spindle speed is determined by the location of the belts on the pulleys inside the head assembly.
The speed chart located on the inside of the belt guard shows the recommended speed and pulley
configuration for each drilling operation:
1. Loosen the two belt tension screws located on each side of the head assembly.
2. Pull the belt tension lever to release belt tension and to loosen the belts.
3. Open the head assembly cover and reposition the belt according to the speed chart. Close the
cover.
4. Push the belt tension lever firmly back into position assuring drive belt is tight. While holding tension
on the motor, retighten the two belt tension knobs securely.
Adjusting quill return spring
See Figures 23 and 24.
Note
The return spring tension is set at the factory and should not require further adjustment.
Note
Turn the depth scale counterclockwise until it stops and tighten the depth scale lock.
1. Lower table for additional clearance.
2. Firmly hold the spring assembly against the head keeping it engaged with the lug while loosening
and removing the outer nut only.
3. Loosen inner nut (approximately 1/4 in.) and disengage spring housing from the lug. Using both
hands turn spring housing counterclockwise to the next notch and engage with the lug.
4. Finger tighten inner nut against spring housing. Do not overtighten as this will restrict quill movement.
5. Loosen depth scale lock and check quill return by rotating feed handles, lowering quill.
6. Proper tension is achieved when quill returns gently to full up position when released from 3/4 in.
depth.
7. If there is not enough tension on spring, repeat steps.
8. Moving only one notch each time and checking tension after each repetition.
9. After adjusting spring, replace outer nut and tighten to inner nut. But do not overtighten against inner
nut.
10. Check quill movement to make sure it is smooth and unrestricted. If movement is too tight, loosen
outer nut and slightly loosen inner nut until unrestricted. Retighten outer nut.