LeeBoy 5300B - Conveyor Chain Tension Slack Adjustment

Conveyor Chain Tension Slack Conveyor Chain Tension Slack
AdjustmentAdjustment
The conveyor chains will need periodic adjustment.
Generally, the slack of a roller chain should be on the
lower side. (Figure 5-45)
Adequate slack (S) is about four (4) percent of the span
for normal drives, but the slack should be about two (2)
percent of the span for the auger chains:
• Vertical drive or close to vertical drive.
• Center distance between two shafts is greater than
three (3) feet.
• Chain is operated under heavy load and high
frequency of on and off drive.
• Direction of the drive is often changed.
Conveyor chains must have a slack
of 3/8 to 1/2 inch. To measure deection, exert 30
pounds of force to chain in either direction.
Tangent Length (TL) Between Sprockets in Inches (Centimeters)
10 (25) 20 (51) 30 (76) 50 (127) 70 (178) 100 (254)
Tangent Length Between Sprockets in Inches (Millimeters)
Horizontal
To 45°
0.4 - 0.6
(10 - 15)
0.8 - 1.2
(20 - 30)
1.2 - 1.8
(30 - 46)
2.0 - 3.0
(51 - 76)
2.8 - 4.2
(71 - 107)
4.0 - 6.0
(102 - 152)
45° To
Vertical
0.2 - 0.3
(5 - 8)
0.4 - 0.6
(10 - 15)
0.6 - 0.9
(15 - 23)
1.0 - 1.5
(25 - 38)
1.4 - 2.1
(36 - 53)
2.0 - 3.0
(51 - 76)
REQUIRED MID-SPAN MOVEMENTREQUIRED MID-SPAN MOVEMENT
S
S
TL
45º
Horizontal to 45° Chain Tension
45° to Vertical
Chain Tension
S
S
45º
TL
S - SLACK
TL - TANGENT LENGTH
Figure 5-45. Chain Slack Adjustment for Proper
Tension
Maintenance
LeeBoy Model 5300B Compact Paver5-44