The adjustment and alignment of sprockets fitted to a common shaft or phasing of chains with attachments is usually by the expensive machining of 'kidney slots' in platewheels and through bolt fixing to a shaft hub.
Howdon has developed a range of simple phasing hubs using conical screws to give a wedging action to grip the platewheel or gear and allow 360 degree adjustment. In this free condition time is saved threading chain through complex machine layouts. When the drive is set the conical screws are tightened to lock giving a positive no slip drive.
