1. Transmission Chains
Application Series HY-VO ® Chain is a unique type of Silent Chain. HY-VO stands for HIGH CAPACITY, HIGH VELOCITY, and INVOLUTE TOOTH, and it is a registered trademark of Borg-Warner Automotive, Inc. In Silent Chain, the pin and the plate rotate against each other. In HY-VO Chains, the pin is comprised of two pieces that have rotational contact. Due to the rotational contact of the pins, the wear life of the chain is increased. Also in HY-VO Chains, the contact point between the pins moves up when the chain engages the sprocket (Figure 1.31). This construction decreases chordal action (which was discussed in Basics Section 2.2.1), vibration, and noise.
PITCH LINE
CONTACT POINT
PITCH LINE
Figure 1.31 HY-VO Chain
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