Rear uprights - bearing carrier clearance

[gegcorp2012]

I'm starting a CBR1000F buggy build and planing to use a Honda Civic trans and short CV axles with the Civic DX front wheel bearings and hubs.

I have attached a photo of the outer bearing measurement and the specs for the tubing that is a close match for the carrier.

So I'm no machinist, and my Harbor Freight digital caliper shows only 2 digits...

If the caliper is accurate, the bearing OD is 2.87". The specs for the tubing say 2.876" ID.

Is .006" enough clearance to slide the bearing into the carrier/upright or would I have to get some machine work done ?

The wheel bearings included a clip retainer that fits in a groove.

Do I need to have a groove cut to hold the bearing in the carrier ?






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Added OD measurement photo in inches.

[K-fab]

More than likely the bearing is 2.875.
Stick the tube in the oven at 350 for 10 min and see if the bearing will slip in.
A groove is recommended.
Where are you? I might be able to do some quick machine work if you cover shipping...

[jimmyg]

Please don't burn your self and if the bearing fits cool things down fast so you don't heat soak you bearing to much.

And please don't burn your self! Safety first.

[gegcorp2012]

...
A groove is recommended.
Where are you? I might be able to do some quick machine work if you cover shipping...

Thanks for the offer !
I am in central Alabama, east of Birmingham so I will try to find some place locally to cut me a couple of grooves.

I will go ahead and get some tube on order.

Assuming the groove would be in line with the outer edge of the bearing... How is the inner edge of the bearing retained, with a step (?)

I may need to turn the tube ID a little to make the bearing slip in and rest against an inner stop.



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[gegcorp2012]

...And please don't burn your self! Safety first.

Yah, parts are always hotter or sharper than they look.

Thanks !

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[gegcorp2012]

Good news ! I found a local machine shop and think I can get my machine work started.

I did a mock-up today to see if I have enough detail to make a shop drawing and realized I need advice on the clearances for a pesky c-clip to hold the bearing in place.

Here are some photos with a few dimensions.

Can someone suggest how much space should be provided between the bearing carrier pipe end and the spindle lugs or backing plate to work that c-clip into place ?

Thanks !




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[K-fab]

Without trying to be a smart ass in my answer, you just need "enough" clearance so things don't hit.

Those are some pretty beefy parts so flex will be minimal but I'd shoot for at least .050", er, about 1.5mm (I see your drawing is in metric).

As long as the spindle is able to bottom out against the bearing and nothing else, you'll be good. Looks like it's gonna be a tight fit.

[gegcorp2012]

Thanks @K-fab ,

I use metric because its easier on my eyes and the parts Im building around are Honda.

The tubes are about 6mm longer than the minimum space taken by the bearing and snap ring, so I was just puzzled about how to get the snap ring out

I watched some repair videos last night and see the way they service the stock Honda bearings is to take the upright assembly off, then press out the hub. That gives access to the snap ring, which can be removed so the bearing can be pressed out.

I will follow up with my local machine shop and make sure theres enough meat to hold the clip in.

It's been a slow start working from the wheels inward, but I can see why it needs to be done that way - causes focus on the details !

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