16
SETTING PRESSURE ROLLER TENSION
CALR PRESSURE ROLLER ADJUSTMENT
NOTE
: Do not apply too much pressure
to tread rollers. If too much tension is
applied, tread rollers may have tendency
to raise out of slotted frame.
Model CALR, cam adjusted live roller
conveyor, is set up and operational at
the factory prior to shipment with proper
drive tension pre-set by Roach assembly
personnel. The cam adjusted live roller
features the quickest and most simple
adjustment of drive tension on tread rollers.
The illustration above shows a typical
numbered cam and CALR frame. The
frame has openings where numbers on the
cam are visible. Therefore, at a glance,
the tread roller tension can be determined.
To readjust in field, return the cam on the
pressure rollers to zero by rotating the shaft
counterclockwise to reduce drive tension.
For quick adjustment use a hex socket. Use
a 5/16” for 638 CALR, a 7/16” for 796
CALR and an 11/16” for 251 CALR. Place
heaviest package at infeed. Beginning
at infeed, adjust cams by rotating shafts
clockwise until package begins to move.
Complete cam adjustment on entire unit
for minimum drive tension required to
convey.
NOTE
: Apply adequate pressure to tread
rollers to convey heaviest box on conveyor.
If too much tension is applied, tread rollers
may have tendency to raise out of slotted
frame.
NOTE
: For quick adjustment use a hex
socketl:
638 CALR..................5-16”
796 CALR..................7/16’
251 CALR..................11/16”
TO INCREASE DRIVE TENSION-ROTATE HEX SHAFT TO HIGHER
NUMBER ON CAM; LOWERING NUMBER DECREASES TENSION
CAMS (ROTATE TO ALTER DRIVE TENSION)
Summary of Contents for 251CALR
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