Jet HBS-1018, Operating Instructions And Parts Manual

 13 

1.  With bar stock securely clamped in the vise, 

make a cut through the bar stock (see Figure 7-
4). 

2.  Mark the top of the bar stock. 

3.  Move the bar stock about 1/4-inch past the 

blade to prepare for a second cut. 

4.  Rotate the bar stock 180 degrees so that your 

mark is now at the bottom of the cut. 

5.  Make a cut through the bar stock. 

6.  Use a micrometer to measure the thickness 

variation of the disk which has been cut from the 
bar stock. Measure at top and bottom of disk. 

The saw blade can be considered correctly adjusted 
when the variation measure is no more than 0.012 
inch across the face of the disk. 

If you do not have a piece of 2-inch bar stock 
available for a test cut, use a larger diameter test 
piece rather than a smaller one. The maximum 
thickness variation on any test piece should be no 
more than 0.003 inch, per side, per inch of stock 
diameter. 

Figure 7-4:  test cut 

7.7

  Changing blade speeds 

Disconnect machine from 

power source before changing belt position. 
Failure to comply may cause serious injury. 

1.  Disconnect machine from power source. 

2.  Open pulley cover. 

3.  Support motor with one hand while loosening 

lock handle (C, Figure 5-3). Lower motor gently. 

4.  Position belt in grooves according to speed 

selection chart on pulley cover. A similar chart 
is found in 

sect 12.0

. 

5.  Tension the belt by pushing up motor and 

tightening lock handle. Correct tension is 
achieved when finger pressure on the belt 
midway between the two pulleys causes 
approximately 1/2" deflection. 

6.  Close pulley cover and fasten. 

7.8

  Bow weight adjustment 

Bow weight has been properly set by the 
manufacturer and should not require attention. If 
future adjustment becomes necessary, due to part 
replacement or other contingency, proceed as 
follows: 

1.  Disconnect machine from power source. 

2.  Raise bow to allow sufficient room for the 

following procedure, and use hydraulic valve 
knob to keep it in raised position. 

3.  Place one end of a fish-type scale under the 

blade tension handle and lift the bow with the 
other end of the scale. The scale should 
indicate approximately 18-to-20 lbs. for the 
HBS-916. For the HBS-1018, it should indicate 
22-to-24 lbs. 

4.  Adjust tension by loosening one nut on the C-

bolt (L, Figure 7-6) and tightening the other. 
Tighten nut and retest the weight. 

7.9

  Vise adjustments 

7.9.1

  General procedure 

1.  Place workpiece between vise jaws with 

required amount to be cut-off extending past 
blade. (Figure 7-5 shows recommended 
positioning of various workpiece shapes within 
the vise.)