I don't know if i'm reading it wrong but you dont ream the needle bearing.
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| Engineering /machining question. https://www.ausmini.com/forums/viewtopic.php?f=5&t=93007 |
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| Author: | 69k1100 [ Wed Jun 29, 2016 4:17 pm ] |
| Post subject: | Engineering /machining question. |
Hi guys, I'm looking to refurb my radius arms myself. To do this I have bought a 13/16 chucking reamer (straight 13/16 shank) now the hard part. The bearing is a b1316 (13/16 needle bearing), I cannot accurately measure the ID of the bearing so I assume the ID is 13/16. The reamer is 13/16, will the reamer fit through the bearing of is the OD of the reamer and the ID of the bearing too closely matched? Or is there some tolerance built into the bearing so that it can accept a 13/16 shaft? Thanks for any help. |
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| Author: | peterb [ Wed Jun 29, 2016 9:08 pm ] |
| Post subject: | Re: Engineering /machining question. |
I don't know if i'm reading it wrong but you dont ream the needle bearing.
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| Author: | drmini in aust [ Wed Jun 29, 2016 9:31 pm ] |
| Post subject: | Re: Engineering /machining question. |
The reamer needs an extension on it and a guide bush fitted where the needle bearing is. Take the needle bearing out first. |
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| Author: | niffty64 [ Thu Jun 30, 2016 6:14 am ] |
| Post subject: | Re: Engineering /machining question. |
you should press the old bearing first fit new bronze bush ream the bush then fit brand new needle roller bearing. good guide here viewtopic.php?t=45978&start=0&postdays=0&postorder=asc&highlight= and this is how i did mine viewtopic.php?f=2&t=55054 |
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| Author: | 69k1100 [ Thu Jun 30, 2016 8:14 pm ] |
| Post subject: | Re: Engineering /machining question. |
Thanks. I bought a reamer that has a 13/16 straight shank which I was intending to use as the guide. Have to wait and see if it will fit in the needle bearing. If so then it souls be easy to machine, I drew a scaled representation of the arm and reamer to get an idea of where the shank sits in relation to the bushing. Should all fit well, else I have to add a bush to the shank (same OD as the needle bearing) and ream it that way. |
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| Author: | drmini in aust [ Thu Jun 30, 2016 10:31 pm ] |
| Post subject: | Re: Engineering /machining question. |
If you do it with the needle bearing in it will fill up with bronze swarf from the reamer. Been there done that. And if you pass the reamer right through and out, the reamer's blades can get damaged by the hard needles. Here are details of the tool I made to remove the needle bearing- viewtopic.php?f=25&t=87679 |
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| Author: | Ian_B [ Sat Jul 02, 2016 10:29 am ] |
| Post subject: | Re: Engineering /machining question. |
My deceased mate Col made a tool for doing this as described.He was the local Mini expert but we now have a new one in this town Not me lol
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| Author: | 69k1100 [ Sat Jul 02, 2016 11:44 am ] |
| Post subject: | Re: Engineering /machining question. |
The correct tool is always handy I think I'm onto something, worst case I will have a Delrin bush lathed up to fit the reamer shank so I can run it through without the needle bearing. Will see how we go. |
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