What's new
What's new
By:
Advanced search…

Pressing Bearings Question

S

Solar71

Titanium
Joined
Mar 24, 2005
Location
Hermosa Beach California
Hi guys.

Just a quick Q about pressing a bearing.

This bearing is 2 inch OD, 1 inch ID, and 1/2 wide.
Its a standard sealed with heavy grease ball bearing. (not roller bearing)

There is a steel shaft thats going to be pressed into the 1 inch ID.

How much interfearance should I use?
Should the shaft be ground to 1.001 or less? Maybe 1.0005? Or 1.0003?

Thanks
 
Well its a general rule... Ive had customers call out minimum interference on steel bushings .531 dia in aluminum pieces from .001 min to .0025 max

.001 per inch is just the general rule. Im sure you will be good leaving a thou for a steel on steel press
 
You can fight the size, or you can get a smooth slip fit and use Blue Lock Tight. Just clean the shaft and bearing id add a few drops and then rotate while slipping it together.

Regards,

Stan-
 
Obviously it's a case by case situation with bearings, but the bearing manufacturer should be able to supply recommended tolerances for their bearings. I usually deal with bearings in the 1" range and go with .0005" in steel and .001" in aluminum. Whatever works
 
manualmachinist said:
A ball bearing that small I would shoot for .0003" Min to .0006" Max press. It is easy to remove the internal clearance designed into the bearing by making it too tight a fit.
Click to expand...

I'll 2nd that. Much more than .0005" press, and bearings tend to bind up. I just had to rework a bunch of parts a couple of weeks ago because we made the mistake of making them to print. On a 2" bearing, any more than .0010" sounds like trouble to me.
 
I too would be in the .0005 range. If youre pressing the bearing into aluminum, .001 would work, steel .0005. A heavy press can crush the bearing.

For the shaft, .0005. If youre making something custom, use bearing journals, keeps the rest of the shaft from getting marred and its a lot easier to hold a .0005 tolerance over a 1/2" section of journal, than an entire shaft. If youre buying straight ground shaft...well thats a little different...its easier to grind a straight shaft for sure. If your shaft is a little tight, warm the bearing (oven 200deg, watch the grease tho!) or cool the shaft (freezer or upside down canned air). Sometimes its just enough to work.
 
You must log in or register to reply here.

Similar threads

WizardOfBoz
Opening up the ID of an aluminum tube
Replies
15
Views
413
boslab
B
M
Grinding Sliding Bearing Holder
Replies
0
Views
91
majohnson
M
A
Drill press spindle bearings what order
Replies
7
Views
410
animal12
A
N
Cat40 spindle rebuild: Thoughts on floating bearings outer races spinning in housing
2 3
Replies
48
Views
2K
Stirling
S
jim rozen
SB drill press chuck size?
Replies
2
Views
329
jim rozen
jim rozen








 

ABOUT PRACTICAL MACHINIST

With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Register for the world’s largest manufacturing technology forum for free today to stay in the know.

Learn more about us.

STAY CONNECTED

Facebook Instagram YouTube LinkedIn Pinterest Twitter Tiktok

Register Become a forum member. Register today.

Sign Up Sign up for our e-newsletter.

© 2024 Copyright Practicalmachinist.com. All Rights reserved.

Back
Top