bellaireroad
Aluminum
- Joined
- Oct 4, 2015
Is it safe to heat a bearing like this to 200°? Will there be any affect on the seals? Thanks
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Heating bearings
- Thread starter bellaireroad
- Start date
- Replies 16
- Views 7,772
awander
Stainless
- Joined
- Jun 11, 2012
- Location
- Eastern PA
Fahrenheit, you're likely OK. Celsius, I'd say no.
Why not look it up at the nearing manufacturer'e website?
Why not look it up at the nearing manufacturer'e website?
Richard King
Diamond
- Joined
- Jul 12, 2005
- Location
- Cottage Grove, MN 55016
Amazing what you can find when you Google search questions.
SKF provides tips on troubleshooting bearing temperatures
SKF heaters for hot mounting of bearings and components
SKF provides tips on troubleshooting bearing temperatures
SKF heaters for hot mounting of bearings and components
bellaireroad
Aluminum
- Joined
- Oct 4, 2015
Yes thanks, google is wonderful. They talk about concerns with the lubricant, wonder if they are talking about open bearings,don't see the seals addressed.
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bellaireroad
Aluminum
- Joined
- Oct 4, 2015
Not sure where to go with that. I ordered them from Accurate
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ballen
Diamond
- Joined
- Sep 25, 2011
- Location
- Garbsen, Germany
To be sure, ask Accurate what the grease and seal types are.
General purpose grease is typically rated for operation to 120C=250F.
See: http://www.skf.com/binary/68-99598/13238EN_GreaseSelectionChart.pdf
General purpose seals are typically made of NBR. This is rated for extended operation to 100C=210F and for short periods to 120C=250F.
See: Temperature limits. (The other materials that are typically used such as FKM generally have higher temperature ratings.)
The bottom line: if these are standard bearings and you are heating them for 20 minutes to install them, it's OK to put them into an oven at 100C=210F. That will expand them by about 0.0006" per inch of diameter, which should be plenty for slipping them over a motor shaft or similar.
General purpose grease is typically rated for operation to 120C=250F.
See: http://www.skf.com/binary/68-99598/13238EN_GreaseSelectionChart.pdf
General purpose seals are typically made of NBR. This is rated for extended operation to 100C=210F and for short periods to 120C=250F.
See: Temperature limits. (The other materials that are typically used such as FKM generally have higher temperature ratings.)
The bottom line: if these are standard bearings and you are heating them for 20 minutes to install them, it's OK to put them into an oven at 100C=210F. That will expand them by about 0.0006" per inch of diameter, which should be plenty for slipping them over a motor shaft or similar.
Rob F.
Diamond
- Joined
- Aug 5, 2012
- Location
- California, Central Coast
Are you not living in the furnas called Texas? I thought it was always 200 there, at least in the sun
Spruewell
Hot Rolled
- Joined
- Sep 8, 2015
- Location
- Northern California
Put your shaft in the freezer if you can. Put the bearing in a toaster oven and get some good gloves that can take the heat.
Tyrone Shoelaces
Diamond
- Joined
- Apr 19, 2006
- Location
- Manchester, England
I used to fit lots of small bearings. In the workshop I worked in we had a wall mounted gas fire/space heater with a metal grill. I'd just put the bearing on top of the grill for about a quarter of an hour. The bearings got just hot enough to be slid on quickly.
For the bigger bearings it was a drum of whale oil in the old days, coming up to date it was one of those big SKF induction style bearing heaters. They are very good. We didn't install many sealed bearings but if you set the heater to the bearing symbol on the control panel the sealed bearings we did fit seemed OK. The temperature of 110 degrees Centigrade seems to ring a bell regarding the recommended setting.
Regards Tyrone.
For the bigger bearings it was a drum of whale oil in the old days, coming up to date it was one of those big SKF induction style bearing heaters. They are very good. We didn't install many sealed bearings but if you set the heater to the bearing symbol on the control panel the sealed bearings we did fit seemed OK. The temperature of 110 degrees Centigrade seems to ring a bell regarding the recommended setting.
Regards Tyrone.
Richard King
Diamond
- Joined
- Jul 12, 2005
- Location
- Cottage Grove, MN 55016
I just wrote the bearing Mfg asking this: I use a infra red hand held heat gun to test temp. Before that I used a wax temp melting pencil I never went over 180 degree's but my bearings were open and I used Iso Flex grease. Let the MFG tell us. Rich
Hello,
Can you tell me what temperature do you recommend that this bearing is heated on a bearing heated to slide onto a shaft? Do you supply a data sheet on the bearing grease? What is the maximum operating temp of the bearing? I have also attached a link to the form we all write and read in. A member asked the question.
https://www.practicalmachinist.com/...aping-and-inspection/heating-bearings-353131/
Thanks for your help
Richard King
Hello,
Can you tell me what temperature do you recommend that this bearing is heated on a bearing heated to slide onto a shaft? Do you supply a data sheet on the bearing grease? What is the maximum operating temp of the bearing? I have also attached a link to the form we all write and read in. A member asked the question.
https://www.practicalmachinist.com/...aping-and-inspection/heating-bearings-353131/
Thanks for your help
Richard King
bellaireroad
Aluminum
- Joined
- Oct 4, 2015
bellaireroad
Aluminum
- Joined
- Oct 4, 2015
Are you not living in the furnas called Texas? I thought it was always 200 there, at least in the sun
You are correct...15 minutes on the driveway, and they are ready to go[emoji1071]
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bellaireroad
Aluminum
- Joined
- Oct 4, 2015
Thanks, they’ll probably come back and say heating may compromise performance, and for sure voids any warranty [emoji4]
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dalmatiangirl61
Diamond
- Joined
- Jan 31, 2011
- Location
- BFE Nevada/San Marcos Tx
Are you not living in the furnas called Texas? I thought it was always 200 there, at least in the sun
Had a can of freon blowup in the back of my truck a few days ago, its bloody hot right now.
I tried the microwave method of heating bearings last year, would not recommend doing it with a bearing that has seals.
Richard King
Diamond
- Joined
- Jul 12, 2005
- Location
- Cottage Grove, MN 55016
Just found this one. SKF says on sealed bearing do not go above 80 C or 179 F. read down to 5th one I think.
Grease degradation on sealed type bearing | AMP Maintenance Forums
Grease degradation on sealed type bearing | AMP Maintenance Forums
thermite
Diamond
- Joined
- Sep 21, 2011
Contrary minded, here.
That may be from 80F down to 0F, an 80 degree swing.
Heating from 80F to 180 F - a 100F delta - doesn't seem much more and both together should be a good thing.
However.. that shaft, bagged, comes outta the freezer, then outta the bag, you've got rime-ice or water on it right away, most environments humans can actually work in.
D'ruther not have that distraction unless I could at least use dry ice or better and get a far wider advantage.
2CW
Richard King
Diamond
- Joined
- Jul 12, 2005
- Location
- Cottage Grove, MN 55016
I just talked to Lynn at Accurate Bearing and she said you should call her. She said it was odd you didn't call her first.
Hi Richard,
When you get a moment, please give me a call on our toll-free line and we can go over this. (800-323-6548)Lynne Scott - [email protected]
Hi Richard,
When you get a moment, please give me a call on our toll-free line and we can go over this. (800-323-6548)Lynne Scott - [email protected]
