Jet IBGM-8VS, Operating Instructions And Parts Manual

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8.4

  Belt tracking 

Rotate belt by hand to check tracking. If belt shifts 
to one side or the other, move tracking lever (D, 
Figure 8-2) while rotating belt until belt completely 
covers contact wheel and stays centered. Move 
lever (D) down for left adjustment, up for right 
adjustment. Turn on grinder to verify setting at 
operational speed.  

If belt refuses to track properly, the rubber contact 
wheel must be adjusted parallel to drive wheel, as 
follows: 

1.  If belt wanders 

away

 from grinder, loosen top 

bolt (E, Figure 8-2) and tap the top of cam 
plate (F) away from grinder. 

2.  If belt wanders 

toward

 grinder, loosen top bolt 

(E) and tap the top of cam plate (F) toward 
grinder. 

3.  Retighten bolt (E), and use lever (D) for final 

tracking. 

Figure 8-2:  belt tracking 

8.5

  Platen adjustment 

The platen should be set so that it just contacts 
underside of tensioned belt, but not so high that 
belt rides up over it, which will hasten wear on belt 
and machine. Loosen hex nuts (G, Figure 8-3) and 
adjust as needed. 

Figure 8-3:  platen adjustment 

9.0

  User-maintenance 

For safety, turn the switch to OFF and remove plug 
from the power source outlet before adjusting and 
maintaining the bench grinder. If the power cord is 
worn, cut or damaged in any way, have it replaced 
immediately. 

9.1

  Ring test 

Before replacing a grinding wheel, perform this 
simple test on the replacement wheel: 

1.  Loop a piece of string through the grinding 

wheel hole and suspend the wheel by holding 
up the string. 

2.  Tap the wheel with a piece of scrap wood or a 

wooden dowel. 

3.  A good wheel will "ring"; a defective wheel will 

"thud". Discard any wheel that does not "ring".  

An internal defect may not be apparent by visual 
inspection alone. The ring test may identify an 
internal crack or void. 

9.2

  Care of grinding wheels 

In normal use, grinding wheels may become 
cracked, grooved, rounded at the edges, chipped, 
out of true or loaded with foreign material. 

Cracked wheels should be replaced 
IMMEDIATELY. The other conditions can be 
remedied with a dressing tool. New wheels 
sometimes require dressing to make them round. 
See 

sect. 9.5.

9.3

  Changing wheels 

The JET bench grinder comes equipped with a 
general purpose grinding wheel. Wheels vary 
according to types of abrasive, hardness, grit size, 
and structure. Contact your local distributor for the 
proper grinding wheel or wire wheel brush for your 
application. 

If you replace a wheel, obtain one with a safe rated 
speed at least as high as the 

NO

LOAD RPM 

marked on the grinder's nameplate. Table 3 shows 
correct dimensions for the replacement wheel. 

Model 

Wheel 

Diameter 

Maximum 

Width 

Center 

Hole 

IBGM-8VS

8" 1" 

5/8" 

Table 3 

Your bench grinder will accept most polishing and 
buffing wheels available at dealers and hardware 
stores. 

The use of any other 

accessory is not recommended and may result 
in serious injury!