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What is a stub shaft and when would you use one?
As the name implies, it is a short shaft located on each end of a dead-shaft idler. If you have stout framework, it is a great alternative to through shafts. It has the advantage of lower cost and easier installation.
What are the different ways to mount an idler shaft?
A Dead-shaft idler shaft can be mounted to a frame via two tapped ends with a hole in each end of a sideframe. Additional accuracy can be obtained by using a shoulder screw with a precision hole being machined in the frame and the end of the shaft. Another mounting technique is a block mount with saddle which makes for easier removal.
Dead-shaft idler shafts can also be mounted to existing pillow block bearings when converting a live-shaft to dead-shaft idler roll.