The Forestry Forum is sponsored in part by:


Forestry Forum
Sponsored by:


TimberKing Sawmills



Toll Free 1-800-582-0470

LogRite Tools



Norwood Industries Inc.


Sawmill & Woodlot Magazine



Your source for Portable Sawmills, Edgers, Resaws, Sharpeners, Setters, Bandsaw Blades and Sawmill Parts

EZ Boardwalk Sawmills. More Saw For Less Money!

STIHLDealers.com sponsored by Northeast STIHL


Woodland Sawmills

Peterson Swingmills

 KASCO SharpTech WoodMaxx Blades

Turbosawmill

Sawmill Exchange

BRUTE FORCE Authorized Dealer

Woodshax Outdoor Vending Solutions

FARMA


Council Tool

Baker Products

ECHO-Bearcat

Arborwear



Author Topic: Bandwheel Bearing  (Read 902 times)

0 Members and 1 Guest are viewing this topic.

Offline Furu

  • Full Member x2
  • ***
  • Posts: 124
  • Location: NW US
    • Share Post
Bandwheel Bearing
« on: May 19, 2017, 04:14:42 PM »
Decided to post this under sawmills as this is from the bearing on my mill's band wheels.

I recently needed to change out the belts on my mill (B56 are the manufacturer spec'ed belts)
Manufacture procedures are to remove the wheels and replace the belts on the bench.  A lot of owners do the replacement on the mill.  I try to change the belts on the mill and if I succeed fine but if not then pull the wheel and go to the bench.  In this case the belt rolled more than normal and I was unable to straighten it out on the mill and thus went to "plan B" the bench.

As I pulled the idle wheel the inner part of the bearing stayed on the shaft of the mill. 

Bearing part nomenclature is not always clear to me.   :)

Whether it is the inner ring or the inner race of the bearing (which is a pressed bearing) this one has a split inner race.  It came out of the bearing body as I slid the wheel off the shaft.

In the picture you can see the split retaining ring in the recess (end of red line)



At the end of the red line is the recess that snaps onto the split retaining ring.



It did not appear that anything fell out of the bearing so I snapped/pressed the split race back into the bearing.

My question is:   not being a bearing expert by any stretch does this happen frequently when you slide a bearing off a shaft?  I have never had this happen before.

Any concerns/thought you have - would be appreciated.

Offline paul case

  • Senior Member x2
  • *****
  • Posts: 4754
  • Age: 43
  • Location: extreeme northeast Oklahoma
  • Gender: Male
  • Original wearer of the PCM.
    • Share Post
Re: Bandwheel Bearing
« Reply #1 on: May 19, 2017, 04:57:42 PM »
What mill do you have?

The one on my Woodmizer is 1 piece.

PC
life is too short to be too serious. (some idiot)
2013 LT40SHE25 and Riehl edger,  WM 94 LT40 hd E15. Cut my sawing ''teeth'' on an EZ Boardwalk
sawing oak.hickory,ERC,walnut and almost anything else that shows up.
Don't get phylosophical with me. you will loose me for sure.
pc

Offline Larry

  • Senior Member x2
  • *****
  • Posts: 5731
  • Age: 69
  • Location: NW Arkansas
  • Gender: Male
    • Share Post
Re: Bandwheel Bearing
« Reply #2 on: May 19, 2017, 05:27:44 PM »
I suspect that your bearing is an angular contact bearing type (read expensive).  They do come apart with a little pressure.  If it is, they have a pre-load specification.  In other words the nut needs to be not to tight, not to loose.  You might give a call to the mill manufacture to check for sure.

Regular bearings are a deep groove type and don't come apart.

Larry

Nine out of ten trees recommend wood for your building project.

Offline woodworker9

  • Senior Member
  • ****
  • Posts: 444
  • Age: 53
  • Location: Northern Illinois
  • Gender: Male
    • Share Post
    • Elite Concrete Raising Co.
Re: Bandwheel Bearing
« Reply #3 on: May 20, 2017, 12:55:34 PM »
Yes, angular contact bearing, very much like the bearings on a trailer.  You have to set pre-load with the correct amount of pressure.....not too loose, and not too tight, or you will destroy the shaft in use.

A call to your manufacturer should solve it.  Feigning that, I typically will set preload so that the bearing is tight enough to spin under very light pressure with no looseness or wobble.  Very hard to describe correctly without showing in person.
03' LT40HD25 Kohler hydraulic w/ accuset
MS 441, MS 290, New Holland L185

Offline Furu

  • Full Member x2
  • ***
  • Posts: 124
  • Location: NW US
    • Share Post
Re: Bandwheel Bearing
« Reply #4 on: May 21, 2017, 09:20:50 AM »
Thanks for the response.

Manufacturer says to torque to 140 Ft lbs.  I did that hope that is all that is needed.

 Not sure what you are referring to as preload in this instance so I went on line and did a search.

Came away even more confused as the way you preload a wheel bearing on a car is the only thing I know of and the only thing I found so ......
In the case of a bandsaw drive wheel/idler wheel how do you preload it?
Do you set it to one torque run it then set the final torque?

Offline woodworker9

  • Senior Member
  • ****
  • Posts: 444
  • Age: 53
  • Location: Northern Illinois
  • Gender: Male
    • Share Post
    • Elite Concrete Raising Co.
Re: Bandwheel Bearing
« Reply #5 on: May 21, 2017, 12:13:51 PM »
Same thing.  Use the manufacturers specs.
03' LT40HD25 Kohler hydraulic w/ accuset
MS 441, MS 290, New Holland L185

Offline 4x4American

  • Senior Member x2
  • *****
  • Posts: 5617
  • Age: 126
  • Location: SE Adirondacks USA
  • Gender: Male
  • Team red, white, blue and orange
    • Share Post
    • Website Link
Re: Bandwheel Bearing
« Reply #6 on: May 21, 2017, 12:57:12 PM »
I thought that when you preload a bearing you tighten it up and then back it off and then torque it to a spec...but what do I know I'm not a doctor, I just play one in a movie
Boy, back in my day..

Offline Furu

  • Full Member x2
  • ***
  • Posts: 124
  • Location: NW US
    • Share Post
Re: Bandwheel Bearing
« Reply #7 on: May 21, 2017, 03:17:35 PM »
I thought that when you preload a bearing you tighten it up and then back it off and then torque it to a spec...but what do I know I'm not a doctor, I just play one in a movie

Kind of what I thought until I did an internet search on the topic and then I got really confused as I read everything from soup to nuts on what preload is and how to do it.

Offline Magicman

  • Senior Member x2
  • *****
  • Posts: 35301
  • Age: 74
  • Location: Brookhaven, MS
  • Gender: Male
  • A "Traveling Man"
    • Share Post
    • Knothole Sawmill
Re: Bandwheel Bearing
« Reply #8 on: May 21, 2017, 03:41:51 PM »
I know nothing except that if you torque a bearing race to 140 lbs, it ain't gonna last long.   :o
Knothole Sawmill, LLC     '98 Wood-Mizer LT40SuperHydraulic   WM Million BF Club Member   WM Pro Sawyer Network

Never allow your "need" to make money to exceed your "desire" to provide quality service.....The Magicman

Offline Kbeitz

  • Senior Member x2
  • *****
  • Posts: 6959
  • Age: 65
  • Location: Millville, Pa.
  • Gender: Male
  • Never enough time...
    • Share Post
    • My Hobbies
Re: Bandwheel Bearing
« Reply #9 on: May 21, 2017, 03:45:28 PM »
I know nothing except that if you torque a bearing race to 140 lbs, it ain't gonna last long.   :o

I was thinking the same thing... If I don't know the torque I tighten it up and turn the bearing. After you do it long enough you get a fell for it. Running it to loose is better
than to tight.
Collector and builder of many things.
Love machine shop work
and Wood work shop work
And now a saw mill work

Offline ladylake

  • Senior Member x2
  • *****
  • Posts: 4743
  • Age: 65
  • Location: grey eagle mn
  • Gender: Male
  • I need to edit my profile!
    • Share Post
Re: Bandwheel Bearing
« Reply #10 on: May 21, 2017, 03:58:47 PM »


  A lot of speculation going on, none of us know how this bearing is set up.  Steve
Timberking B20 12000 hours +  Case75xt grapple + forks+8" snow bucket + dirt bucket   770 Oliver   Lots(too many) of chainsaws, Like the Echo saws and the Stihl and Husky     W5  Case loader   1  trailers  Wright sharpener     Dino setter Volvo MCT125c skid loader

Offline pine

  • Senior Member
  • ****
  • Posts: 614
  • Location: PNW
    • Share Post
Re: Bandwheel Bearing
« Reply #11 on: May 22, 2017, 11:02:37 AM »


  A lot of speculation going on, none of us know how this bearing is set up.  Steve

Have to agree with Steve on this. We don't know how the bearing is set up.

I am not that knowledgeable on bearings either and I learned from Larry the term "angular contact bearing" which I had never heard before. 
However to say as was posted "I know nothing except that if you torque a bearing race to 140 lbs, it ain't gonna last long" while maybe true, makes an assumption that may not be accurate either. 
There is a lot of information missing and the OP seems to be missing information as well and that is what they were asking/searching for. 

They asked: "My question is: not being a bearing expert by any stretch does this happen frequently when you slide a bearing off a shaft? "

Unfortunately I am not able to help the OP on that question as I have no idea as to how to answer that and it appears that no one else does either. 

On the issue of the 140 ft lbs torque.  I have a TK mill so it rang a bell.
The 140 ft lbs torque makes me think the OP may have a Timberking mill as TK in the belt changing video at about 8:50  into it,  specifies 140 ft lbs torque on the re installation of the wheel so the manufacture (if the OP has a TK) does specify 140 ft lbs on the bearing torque. 

Just saying.

I was unable to insert a link to the belt changing video for some reason this morning so that it displayed correctly.  Thus no direct link.


Offline Magicman

  • Senior Member x2
  • *****
  • Posts: 35301
  • Age: 74
  • Location: Brookhaven, MS
  • Gender: Male
  • A "Traveling Man"
    • Share Post
    • Knothole Sawmill
Re: Bandwheel Bearing
« Reply #12 on: May 22, 2017, 12:19:16 PM »
I see that everyone is agreeing that since there are unknowns, caution is advised.  Know exactly what the manufacturer's specifications are before proceeding.
Knothole Sawmill, LLC     '98 Wood-Mizer LT40SuperHydraulic   WM Million BF Club Member   WM Pro Sawyer Network

Never allow your "need" to make money to exceed your "desire" to provide quality service.....The Magicman

Offline ladylake

  • Senior Member x2
  • *****
  • Posts: 4743
  • Age: 65
  • Location: grey eagle mn
  • Gender: Male
  • I need to edit my profile!
    • Share Post
Re: Bandwheel Bearing
« Reply #13 on: May 22, 2017, 05:40:05 PM »


 If these bearings are set up with a spacer between the inner races 140# of torque would be just fine, no spacers then finger tight.  Steve
Timberking B20 12000 hours +  Case75xt grapple + forks+8" snow bucket + dirt bucket   770 Oliver   Lots(too many) of chainsaws, Like the Echo saws and the Stihl and Husky     W5  Case loader   1  trailers  Wright sharpener     Dino setter Volvo MCT125c skid loader

Offline Kbeitz

  • Senior Member x2
  • *****
  • Posts: 6959
  • Age: 65
  • Location: Millville, Pa.
  • Gender: Male
  • Never enough time...
    • Share Post
    • My Hobbies
Re: Bandwheel Bearing
« Reply #14 on: May 22, 2017, 05:58:52 PM »
Generally, a setting ranging from near zero to slight preload maximizes bearing life. Some applications use moderate preload to increase rigidity of highly stressed parts that would otherwise be adversely affected by excessive deflection and misalignment. Excessive preload, though, can drastically reduce bearing fatigue life or cause high temperatures that can quickly lead to bearing damage.

Collector and builder of many things.
Love machine shop work
and Wood work shop work
And now a saw mill work


Share via delicious Share via digg Share via facebook Share via linkedin Share via pinterest Share via reddit Share via stumble Share via tumblr Share via twitter

xx
Bandwheel bearing problem...need advise

Started by Ga Mtn Man on Sawmills and Milling

46 Replies
5181 Views
Last post April 18, 2018, 08:59:40 PM
by Larry
xx
idler bandwheel bearing saga

Started by coastlogger on Sawmills and Milling

4 Replies
896 Views
Last post January 21, 2012, 06:08:24 PM
by coastlogger
xx
Woodland Mills hm126 bandwheel bearing replacement....

Started by mattyo5 on Sawmills and Milling

9 Replies
577 Views
Last post March 20, 2017, 07:29:56 PM
by mattyo5
xx
Bandwheel question

Started by Danny_S on Sawmills and Milling

24 Replies
3927 Views
Last post June 30, 2004, 02:40:07 PM
by scottr
 


Powered by EzPortal