Basics 1.1.1 Basic Structure of Power Transmission Chain A typical configuration for RS60-type chain is shown in Figure 1.1.
Press Fit
Press Fit
Slip Fit
Pin
Roller
Bushing
Press Fit
Roller Link Plate
Slip Fit
Pin Link Plate
Connecting Link Plate
Spring Clip
Offset Pin Cotter Pin
Figure 1.1 The Basic Components of Transmission Chain
Connecting Link This is the ordinary type of connecting link. The pin and link plate are slip fit in the connecting link for ease of assembly. This type of connecting link is 20 percent lower in fatigue strength than the chain itself. There are also some special connecting links which have the same strength as the chain itself. (See Figure 1.2.) Tap Fit Connecting Link In this link, the pin and the tap fit connecting link plate are press fit. It has fatigue strength almost equal to that of the chain itself. (See Figure 1.2.) Offset Link An offset link is used when an odd number of chain links is required. It is 35 percent lower in fatigue strength than the chain itself. The pin and two plates are slip fit. There is also a two-pitch offset link available that has a fatigue strength as great as the chain itself. (See Figure 1.3.)
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