All MetalShaping

Go Back   All MetalShaping > General Metal Shaping Discussion > General Discussion
  Today's Posts Posts for Last 7 Days Posts for Last 14 Days  

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 05-17-2020, 10:03 PM
robbie_11 robbie_11 is offline
Member
 
Join Date: Jul 2011
Location: NSW, Australia
Posts: 46
Default

Right,
It has been changed to a rolling bearing at some time in its life.

Its spins for two revolutions after a some lubrication. Can I get a company to make me a bearing that will support the weight of the shaft, the bearing in it is obviously not good enough.

Any thoughts?
__________________
Robbie
Reply With Quote
  #12  
Old 05-18-2020, 10:02 AM
billfunk29 billfunk29 is offline
Member
 
Join Date: Oct 2013
Location: Minnesota
Posts: 258
Default Roller bearings

Big roller bearings can be expensive.

https://casterconnection.com/431620.html
I have usually found them in industrial casters.
Good luck.
__________________
Bill Funk
Reply With Quote
  #13  
Old 05-18-2020, 01:32 PM
crystallographic crystallographic is offline
MetalShaper of the Month October '14 & April '16
 
Join Date: Dec 2010
Location: Western Sierra Nevadas, Badger Hill, CA
Posts: 3,434
Default Wheel Maintenance (ball-and-race bearings)

This is a very old Wheel that we pulled apart to clean and lube because it sounded and felt as though rocks had been crushed with it.
P1010067c.jpg
And since we had to make some 727 fusellage skins, we had no choice but to get the old girl going, again.
P1010065c.jpg
These are "ball and race" bearings. They are sold by bearing supply houses, and a good bearing house counter man can look up bearings in his books by Dimensions - outside dia, inside dia. and width .... IF you cannot get the bearing number off of the edge of one of the races.

Sometimes there are quality levels of the same bearing /dimensions, so the load spec can be increased.

We did not have to replace them - good thing because we were so remote - and after a good soaking and washing by the aircraft mechanics on staff, they were dried off and lubed thoroughly with a light bearing grease. The machine worked very well after the full maintenance.

(Skins were made, fit and riveted, and then Boeing sent inspectors all the way from Seattle .... the old bird passed inspections with flying colors.)


You can do this.
__________________
Kent

http://www.tinmantech.com

"All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919.

Last edited by crystallographic; 05-18-2020 at 01:34 PM.
Reply With Quote
  #14  
Old 05-18-2020, 03:43 PM
Jaroslav Jaroslav is offline
MetalShaper of the Month April 2020
 
Join Date: Dec 2012
Location: Czech Republic
Posts: 1,004
Default

Kent. Why did you give that wheel so much work? Just go to Google and find the restart instructions. That would be right away.

But it's clear. Once every 50 years, the machine should be lubricated ...... or repaired and lubricated.
__________________
Jaroslav
Reply With Quote
  #15  
Old 05-19-2020, 04:48 AM
robbie_11 robbie_11 is offline
Member
 
Join Date: Jul 2011
Location: NSW, Australia
Posts: 46
Default

Do you think I could get a new Babbitt Bearing made? Or buy a new rolling bearing that will support the weight?
__________________
Robbie
Reply With Quote
  #16  
Old 05-19-2020, 02:03 PM
crystallographic crystallographic is offline
MetalShaper of the Month October '14 & April '16
 
Join Date: Dec 2010
Location: Western Sierra Nevadas, Badger Hill, CA
Posts: 3,434
Default

Quote:
Originally Posted by robbie_11 View Post
Do you think I could get a new Babbitt Bearing made? Or buy a new rolling bearing that will support the weight?

Babbitt bearings (one type of "plane bearings") of large sizes are often-but not always- poured in place and then machined/scraped/semi'd/finished - align-bored in place when done to that point. You would have to get your needed measurements - width and outer diameter, and then locate a bearing maker and talk to them about making up what you need, and how to go about that for your machine. You may find a maker who can make up something close enough for you to install and then you'd have to jury-rig an I.D. align-boring bar in your machine and then hand turn the Inner Dia.


Otherwise, get your dimensions and investigate ball-and-race bearing assemblies that would match both your hole and your shaft end.

If all this is too technical for you then try to locate someone who uses a metal lathe to make parts with and ask them to help you .... ... you might make a new friend ... ... and get your machine going while learning a fundamental skill --> fitting new bearings into old machines.
This is not hard - it's only a new lesson.
__________________
Kent

http://www.tinmantech.com

"All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919.

Last edited by crystallographic; 05-19-2020 at 02:09 PM.
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 09:19 AM.

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.