Suggestions on How to Remove a Small Bearing

[SimonP85]

The bearings in our Stowe wind anemometer need replacing after 20 odd years of service. I've seen the various threads on taking the unit apart, sourcing reasonably priced bearings etc and have been able to take the unit apart. However, I'm stumped at how to safely remove the existing bearings.

Pictures below - bearing outside diameter is 6mm, inside 2mm. There is a hole through the plastic housing that the anemometer shaft goes through, but that isn't much bigger than 3mm.

Perhaps I'm just not seeing an obvious solution, any suggestions would be much appreciated.

 

[Yellow Ballad]

Can you not get a thin screwdriver from behind and drift the bearing out by tapping on the inner race?

 

[Turnnidge]

Another possibility would be to find a machine screw that’s head will fit through the 3 mm hole but catch on the ID of the bearing. Then put a penny washer, then a nut on the other end and tighten gently, this should press the bearing out.

 

[Poignard]

Another possibility would be to find a machine screw that’s head will fit through the 3 mm hole but catch on the ID of the bearing. Then put a penny washer, then a nut on the other end and tighten gently, this should press the bearing out.

Excellent idea. A countersunk head screw would be good as it would centre itself.

 

[RichardS]

I'd use a vice and something hollow like a socket. Put a short 3mm rod in one side so it is pressing against the back of the bearing and the socket over the small diameter side but large enough for the bearing to slide into in. Then put the whole assembly into a vice a tighten gently. The bearing will just push out into the socket.

See my thread from earlier this year on replacing the bearings on an ST60 MHU.

Richard

 

[SimonP85]

Another possibility would be to find a machine screw that’s head will fit through the 3 mm hole but catch on the ID of the bearing. Then put a penny washer, then a nut on the other end and tighten gently, this should press the bearing out.

Perfect thanks I knew there would be a decent solution!

Something like this looks like a viable option:

https://www.westfieldfasteners.co.uk/A2_ScrewBolt_SHCap_M1.6.html