Tubular drive shafts for centrifugal fans
Tubular drive shafts for centrifugal fans
(OP)
I am looking for detailed information as to how to join a hollow circular tube shaft to solid smaller diameter journals. The completed assembly would consist of a long hollow tube joined at each end to a solid shaft journal.
The large shaft would support two to three centrifugal fans.
Any ideas would be appreciated.
The large shaft would support two to three centrifugal fans.
Any ideas would be appreciated.





RE: Tubular drive shafts for centrifugal fans
my only thoguht would be to machine the bore of the tube so as it was a light press fit onto the journals at both ends, then secure the journals at the set distance to stop it working out. That or machine a keyway into both journals and the shaft but thats even more costly. If the differance in dia is large, you could use a taperlock coupling, using the bore of the tube as the o-ring for the lock to compress against, locking it onto the smaller solid shaft
Al HIllery
Design Engineer
RE: Tubular drive shafts for centrifugal fans
Failures of the press fit were rare, but not unheard of.
Issues of balance, critical speed etc depend a lot on uniform wall thickness, which is related to initial wall thickness from the mfg method, and straightness.