Simple Bearing Question
Simple Bearing Question
(OP)
I am designing a swing test fixture with little prior bearing experience. My plan is to use some off the shelf 4 bolt flange mounted bearings. The swing stand is a box shape and the swing itself is a u shape. Each side of the swing will have a 3/4" shaft that will go to bearing. Due to payload constraints, I am not able to have 1 shaft run across the structure to engage both bearings. The payload will be centered about the swing and will be approximately 75 lbs. The swing spans about 26" in length b/w bearings. The bearings selected have 1 rolling element in the assembly. I have an idea to align the system using a straight rod to span the system as an alignment tool and some alignment blocks to hold the swing in place.
Question: Will this design work with 1 bearing (2 total) attached to the outside of the stand or do I need 2 bearings per side (4 total) to distribute the load of the swing? (See attached pic for description)
Question: Will this design work with 1 bearing (2 total) attached to the outside of the stand or do I need 2 bearings per side (4 total) to distribute the load of the swing? (See attached pic for description)





RE: Simple Bearing Question
RE: Simple Bearing Question
RE: Simple Bearing Question
I personally would probably use two bearings per side, one on the outside face of the stand, and one on the inside face of the stand, secured by the same bolts. The paired bearings can be aligned nicely with the stub shaft inserted before the mounting bolts are tightened.
Another alternative is the stub axle assemblies sold for small trailers, in which case the stand would be drilled with a wheel bolt pattern, and the swing would be analogous to the trailer frame or axle tube.
Mike Halloran
Pembroke Pines, FL, USA
RE: Simple Bearing Question
RE: Simple Bearing Question
Russell Giuliano
RE: Simple Bearing Question