Works with 1.375 x 24 Right hand thread freewheels.
Note: This is for the jack shaft ONLY. Any other parts you need must be added to the order.
The 5/8" OD shaft is 4-12/32" to the outside snap ring grove. The 2nd snap ring grove is 5/8" inward. It has a 3/16" x 1-3/4" long keyway. The two flats are cut to help remove the freewheel. Place the two flats in a bench vise or hold witha 15 mm open end wrench.
Used to get reduction and / or move the drive more towards the LEFT of the driven freewheel.
Support this with 5/8" Bearings or drop out of a bike.
You can add a solid sprocket or place a freewheel adaptor or use a Three prong sprocket / adaptor and freewheel. Be sure and order a 5/8" Ext snap ring and it will act as a safety to hold the sprocket on and retain the key if the set screws come loose on the sprocket.
Be sure and order the 5/8" External Snap Ring (s) if you need them. The link is below. 5/8" External Snap Ring
Made out of 12L14 steel and Zinc Plated.
More jack shafts that you may want to look at below:
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