Chain Sprocket fits on the shaft of your Wonder Junior Hand Grain Mill so you can hook it up to a bike. The chains of most modern bicycles will fit the sprocket, and mill speed must be no more than 300 RPM. User is solely responsible for safe design and operation of any drive system, including full shielding, which is essential for safety.
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“Very prompt service and great selection of high quality products. This part works great at a fraction of the price in other places.”
– Jerry L., CT
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