4. Top Chains
Table 4.6 TTUPTop Chain and Sprockets
Chain Bushing Maximum Pitch Diameter Allowable
Sprocket
Number
Outer Diameter of
(mm)
(mm)
Load (kN)
of Teeth P.C.D.
Steel
Plastic Plastic Idler Wheel
10
123.29
N/A
N/A 130
10.5 129.26
38.1
15.2
1.08
11 12
135.23 147.21
N/A
142.5
154.5 (Split is available)
13
159.20
N/A
N/A
Table 4.7 TTUP Top Chain Special Feature Availability
Top Plate Anti- Width (mm) Standard Friction Resistant Chemical Low- Heat-
Electroconductive Plastic Pin
82.6
N/A
Consult
N/A N/A
114.3
N/A Manufacturer
Consult
190.1
N/A Manufacturer
N/A
: Available
Sprockets An engineered plastic idler pulley may be substituted for the sprocket at the tail shaft. The idler pulley rotates freely, without bearings, on the fixed steel shaft. NOTE: Excessive chain tension can damage the idler pulley.
Selection and Handling The main difference between TTUP and TPU Top Chain is that TTUP does not have float-prevention tabs. Therefore, TTUP may be more easily detached from guide rails.
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