In a chain drive particularly for an accessory drive of an internal combustion engine lubricant is supplied to the chain from a lubricant supply through a trunnion carrying the chain gear to a passage extending through the chain gear radially to an area adjacent the chain by way of a groove which is formed in a bearing sleeve disposed on the chain gear hub and which has a flow cross-section of a depth and width selected so as to form a throttle area to limit the lubricant flow.