Ausmini
It is currently Fri Mar 29, 2024 5:39 pm

All times are UTC + 10 hours




Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 2 posts ] 
Author Message
PostPosted: Thu Mar 06, 2014 12:27 pm 
Offline
religious status
religious status
User avatar

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39621
Location: near Baulkham Hills, NSW
Assembled tool-
Image

Split collet-
ImageImage

Assembled on stud-
Image

Notes:
1. The O-ring shown is just to save me losing the collets when not in use.... :roll:
2. I have long ago forgotten how to draw in CAD, so here are the collet machining details:

Machine the pair in 1 piece from bar stock 1045 or better- I used a bit of 4140. No heat treatment.

Collet body diameter 0.750" (19.05mm) x 20mm long.
Flange diameter 23mm x 2mm wide. [edit] this was 24mm but I've reduced it so the tool works on top arm bearings.
Tap M12 right through.
Slot 5mm wide end to end, to make 2 collets. I used a slot drill in the mill, held in vice, did 1 side then turned it over.
Deburr edges, hold the pair of cut collets in a 4 jaw chuck and clock up the oval flange so it's concentric.
Turn the flange to 0.740" diameter, so that it will fit through the bearing.
Stud is 12mm threaded rod, 120mm long.

To use, drop the collets into the bearing, check they are level with each other and screw the stud in. Then drop a Mini drive yoke over it, fit washer and tighten nut. You could make up an outer body instead, but this works fine.
I warm the alloy up a bit (200C?) with a hot air gun to reduce drag.

This tool works with both the 1" OD 3 synchro idler bearings, and the 1-1/16" OD 4 synchro ones. it is NOT for A+ housings.

[edit] It will now also remove the front suspension upper arm needle roller bearings. Use with a 1-1/16" or 27mm, 1/2" drive socket.

Image

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


Top
 Profile  
 
PostPosted: Thu Mar 06, 2014 12:42 pm 
Offline
SooperDooperMiniCooper ExpertEngineering
User avatar

Joined: Fri Apr 29, 2005 9:46 am
Posts: 18853
Location: Under the bonnet son!
Thanks to Kevin for creating this How-To.

Removing idler bearings has always been in the category of least favourite jobs for me...

Cheers!

_________________
SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.


Top
 Profile  
 
Display posts from previous:  Sort by  
Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 2 posts ] 

All times are UTC + 10 hours


Who is online

Users browsing this forum: No registered users and 5 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  

© 2016 Ausmini. All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.