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The David Round Company is a leading supplier of sheaves and chains, which are used extensively for opening and closing mechanisms for heavy overhead doors. These lifting chain products are also used to lift elevating platforms, boats, and other similar objects. Chain guides (packets) are available for all hand wheel sheaves.
Recommended key way sizes are intended for sales use only. Key way size varies with material selection and application requirements. Recommended key way sizes are for 1018 steel shafts and 1018 steel keys.
All products are made in the U.S.A.
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