How to Attach Pulley to Hollow Shaft

[TexasRotorHead]

Any advise on how to attach a pulley to a hollow shaft?

Background info:

Shaft Material: Steel (exact type not determined)
Pulley Type: Synchronous Belt (14M 6.32" Pitch Diameter, 2000 RPM, 125HP, 315 ft-lbs TQ)
Shaft OD: 50mm
Shaft ID: 40mm

My initial thought is taper lock bushings (2517 Gates). This puts a very high clamp pressure that can crush the shaft. The other is welding, but the shaft materials that we want to use cant be easily be welded.

Any tips/tricks as to how attach said pulley?

Thanks alot.

 

[amorrison]

Brazing ?

 

[GregLocock]

In my experience if taper locks won't work nothing else will.

However, loctite might be a less crushing way of handling this.

I assume you've actually stressed all this and it makes sense?

5mm wall thickness tube is an unusual choice for that job, I'd expect a solid shaft.



Cheers

Greg Locock

I rarely exceed 1.79 x 10^12 furlongs per fortnight

 

[TexasRotorHead]

The design requires a hollow shaft. The wall thickness is variable, but as a starting point 40mm is used.

How much would a chemical bond like loctite increase the holding power?

 

[Occupant]

Can't you use something like Ringfeder? They are interchangeable with Taperlock, but have less of a taper angle and, therefore, have a more sensitive adjustment.

 

[MikeHalloran]

The traditional lightweight aircraft way is with splines to carry the torque, and something else to carry the thrust.

You could bottle-bore the shaft, i.e., just make it locally thick enough to deal with the stress from the taper-lock.



Mike Halloran
Pembroke Pines, FL, USA

 

[williedawg]

I second the Ringfeder idea. The keyless locking hub is made for an application like this.

 

[TVP]

I agree with Mike, splines for the torsion, and something else to accommodate the thrust. Adhesives would be one option. Loctite, 3M and Hexcel have technical information available on their websites.

 

[diskullman]

I'd suggest the tran-torque keyless locking bushing

http://www.fennerdrives.com/keyless_bushings/trantorque_home.aspx

Russell Giuliano

 

[diskullman]

Oops! Trantorque also has a QD style bushing that uses off-the-shef pullies, no modification required.

http://www.fennerdrives.com/catalogs/trantorque_qc.pdf

Russell Giuliano

 

[plasgears]

Can you add a plug under the pulley? This would allow a number of options.