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  #13  
Old 06-03-2015, 11:02 PM
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Re: Changing wheels

Take a hockey puck jig it up between some wood and either run a radial arm across it or flip it and run it across a table saw, be smart. I forgot the depth I used but make the slot a hair shallower than the pinch weld is tall. I've used this with my floor jack for years on several grands, fits perfect. I've made it out of all sorts of materials, someone did make one a while back out of poly and it was nice but I had a hockey puck. It has its limits but it's also cheap and easy..

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  #14  
Old 06-03-2015, 11:11 PM
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Re: Changing wheels

The hockey puck is a good idea. But I must have something wrong about the lift point. I assumed that the weight is taken by the surfaces on each side of the pinch weld, but if you cut the groove shallower than the pinch weld, that implies that the weight is taken by the pinch weld seam itself. Is that what you're saying?
Btw, how thick is a hockey puck, as I'd want to make an indentation to take the head of the jack, opposite the groove.
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Old 06-03-2015, 11:24 PM
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Re: Changing wheels

S'ok. Mr Google tells me it's 1" thick. Another option is a PE cutting board, but most are only 12mm thick, and more expensive.
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Old 06-03-2015, 11:29 PM
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Re: Changing wheels

The seam edge takes the load Russell.
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Old 06-04-2015, 01:06 AM
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Re: Changing wheels

It's amazing what a bit of focus does:
The grease fixed the problem - I'm surprised at the magnitude of the change, so thanks Steve.
Secondly, I crawled under the car with the jack, and determined, that as you say, the seam takes the load - but only in the front!
The rear jacking point is slightly inboard of the seam, and is a plate with a hole in it into which the "lips" around the slot in the jack fit. I suppose it would be ok to use the seam instead, although you have to do this about 50mm in front of the jacking point arrow.
I'll go ahead with the hockey puck or similar idea, at least so I can use it on the trolley jack, but the grease means that it's not as urgent for roadside problems now.
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