Powermatic 1791305, Operating Instructions And Parts Manual

19

NOTE: One notch of the scale equals 1mm. 

6.  With your fingers on the shank portion of the 

cutter, carefully rotate the cutter toward the 
plus (+) or minus (-) position as needed. 

7.  When satisfied with the adjustment, tighten 

both set screws firmly. 

8.  Re-attach the spring on the headstock, and  

re-install the dust hood. 

Drive Belt Tension 

The tightness of the belt that drives the spindle 
has been adjusted at the factory. Further 
adjustment may be necessary after the machine 
receives some use, as the belt may stretch 
slightly during the “breaking in” process. 

Belt tension can be adjusted by a socket head 
cap screw at the rear of the headstock (Figure 
26) which slides the motor toward or away from 
the spindle. To tighten the belt, rotate this cap 
screw clockwise with a 6mm hex wrench. To 
loosen the belt, rotate the cap screw 
counterclockwise. The belt should be just tight 
enough to prevent it slipping on the spindle 
during operation. 

Replacing cutter 

The cutter is very sharp; use 

caution when working with or around cutter. 
Disconnect machine from power source! 
Failure to comply may cause serious injury.

1.  To replace the cutter, loosen both set 

screws (Figure 25) and carefully pull up on 
the cutter until it is free from the spindle.  

2.  Slide the new cutter down into the spindle, 

and align the cutting edge with your 
previous setting on the spindle scale.  

3.  Tighten both set screws. 

Oil Output 

Oil is distributed through the air lines for 
constant lubrication of the clamping system. The 
oil output can be adjusted by rotating the oil 
regulator knob (A, Figure 27). Turn the knob 
counterclockwise to increase oil output, 
clockwise to decrease oil output.  

The level of oil should be checked occasionally 
and re-filled as necessary. A minimum level is 
marked on the window of the oil cup (C, Figure 
27). Refill by removing the screw (B, Figure 27) 
and pouring oil into the fill hole. When finished, 
re-install screw (B, Figure 27). Use standard air 
tool oil. This is available from your local 
distributor, or can be found in most hardware 
and tool stores. 

Figure 26 

Figure 27