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| Rear Radius Arm Bushes internal dia https://www.ausmini.com/forums/viewtopic.php?f=2&t=73995 |
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| Author: | kiwiinwgtn [ Sun Nov 06, 2011 6:57 pm ] |
| Post subject: | Rear Radius Arm Bushes internal dia |
Hi I am wanting to work out what the internal bore size of the radius arm bushes before its reamed. eg a new one Anyone have one lying about Thanks Kiwiinwgtn |
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| Author: | drmini in aust [ Sun Nov 06, 2011 7:05 pm ] |
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I have a few `strange' kits here from Mini King (strange in that they have 2x bushes in and no needle bearing, so won't fit most Mini arms except 1959-61..) 
Anyway, they are a split (ie rolled) bronze bush, and when butted up round are pretty much size for size on the shaft. I would say after pressing in, only about .005" would need to come out with the reamer, if that. |
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| Author: | kiwiinwgtn [ Sun Nov 06, 2011 7:13 pm ] |
| Post subject: | |
I was thinking of buying this to ream out the bushes, well something simular http://www.ebay.co.uk/itm/Morse-Expansi ... 8812690463 |
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| Author: | drmini in aust [ Sun Nov 06, 2011 7:35 pm ] |
| Post subject: | |
Nope you would do better with an adjustable reamer. You can then adjust the size to fit the shaft. I use this one- http://www.machineryhouse.com.au/R726 Cheap but well made. You will need to tap it then screw a guide on, to ensure alignment between the 2 bushes. 
If you have a lathe you can put one end of the arm on the tailstock centre, and the reamer in the chuck. Like this- (note for illustration only- I need a bigger centre...  )
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| Author: | kiwiinwgtn [ Sun Nov 06, 2011 8:07 pm ] |
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Thanks or the pic. Next time you have some verniers in your hand any chance of making a sketch of the pilot part so I can get one made up Ta Bernard |
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