Bosch integrated microwave door hinge issue

[595Heaven]

The door on our microwave has been more and more difficult to close tight enought for the safety interlock to allow the microwave to run.

I suspected the springs on the door hinges has stretched, so spent £42 on a pair of them. Just taken one side of the microwave to bits to fit them and the old spring are fine. The issue is that a nylon guide wheel for the hinge has developed a flat spot just through wear and tear. Once the wheel has turned to the flat spot, the hinge slides doesn't move any further without a shove. I'm assuming both sides will have the same issue.

This is the part with the nylon wheel on:



These are £26 and £36 each! Not sure why the different prices for LH / RH
https://www.bosch-home.co.uk/en/product/00436537
https://www.bosch-home.co.uk/en/product/00436538

Before I spend even more, anyone got any bright ideas how I might fix them? Or a cheaper source for the parts?

[Simpo Two]

Put it on a lathe and turn the flat spot off?

Except that if you don't have a lathe or a friend with one, a new microwave would be cheaper

[JoshSm]

Can you get the wheels off? It's not impossible to get a new one turned on a lathe (reshaping the existing would probably make it too small) but 3d printing might be easier.

I'd also try to work out why they wore flat & make sure that can't happen again, maybe needs better lubrication.

[595Heaven]

No lathe / 3D printer owning friends, and the wheel itself looks lie it is riveted on to the bracket.

The microwave must be 14-15 years old now, so I think it is just worn out. There was a little bit of white lithium grease on it, but not very much.

Going to order the parts. In total I'll have spent about £100, and a new one with a drop down door (albeit 900W instead of 1000W like this one) is £699

Edited by 595Heaven on Wednesday 18th March 22:11

[JoshSm]

At least you can get the parts, and get them direct too.

Not exactly cheap but a fraction of the alternative.