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14" Jet bandsaw thrust bearing noise

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Forum topic by Alex Lane posted 12-29-2017 04:13 AM 503 views 0 times favorited 11 replies Add to Favorites Watch
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Alex Lane

515 posts in 4004 days


12-29-2017 04:13 AM

Topic tags/keywords: bandsaw noise thrust bearings jet 14

https://youtu.be/PipaPQMakcc

Please check out the YouTube video I posted. Is this weird “barking” noise from bad thrust bearing(s) whenever I release pressure of the workplace into the blade?

If so, can the bearings be lubricated or are they in need of replacement?

Thanks all!

-- Lane Custom Guitars and Basses


11 replies so far

View TheFridge's profile

TheFridge

10081 posts in 1600 days


#1 posted 12-29-2017 04:22 AM

That’s weird. The thrust bearing doesn’t look like it’s spinning much. If the blade touches it it should be spinning like a mofo. You might be able to pull a seal and clean it and repack it but that may or may not solve the problem.

They are cheap though. I like to keep a couple on hand personally.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View Rick S.'s profile

Rick S.

10256 posts in 3147 days


#2 posted 12-29-2017 04:40 AM

That Thrust Bearing is not moving as fast as it should be. Put a new one on. The sound is like the blade backing into the wood, that seems to be the time the noise happens also.

-- It is not necessary for Some People to turn OFF the LIGHT to be IN the DARK!

View Woodknack's profile

Woodknack

12329 posts in 2494 days


#3 posted 12-29-2017 05:07 AM

Does the bearing spin smoothly and freely? If not, replace it. You can lubricate temporarily by soaking in oil or I’ve heard of drilling holes in the shield to let oil in but it’s only temporary.

-- Rick M, http://thewoodknack.blogspot.com/

View Kelly's profile

Kelly

2071 posts in 3058 days


#4 posted 12-29-2017 07:44 AM

Bearings for my Powermatic run twenty each, and it takes five for the blade support. Alternately, I get them from VBX Bearings for about five buck for eight bearings, plus about five bucks shipping.

I keep ten around and just ordered more, because I sent a container of them over to my friend, to have on hand for his new saw.

View johnstoneb's profile

johnstoneb

2998 posts in 2287 days


#5 posted 12-29-2017 02:24 PM

That noise has nothing to do with the bearing The blade is snapping back from going past something. The bearing definitely needs replaced. I would check and replace the lower thrust bearing at the same time and also check the adjustment of the lower bearing. The noise may be the blade pushing past the lower bearing then snapping back when the pressure is taken off it. Get the number off the bearing and go to a bearing house for replacement.

-- Bruce, Boise, ID

View Harryn's profile

Harryn

71 posts in 2702 days


#6 posted 12-29-2017 06:53 PM

The seals of most bearings can be removed with the help of a needle. I’ve had good results by repacking with Vaseline.

View Kelly's profile

Kelly

2071 posts in 3058 days


#7 posted 12-29-2017 07:08 PM

All my bearings came with just oil and that’s all the company recommended. I had enough bearings and had had trouble with them enough times I wanted to experiment, so I packed some with my moly grease. It seems to have helped by slowing down the amount of grit getting into the bearings.

View teejk02's profile

teejk02

484 posts in 1239 days


#8 posted 12-29-2017 10:24 PM

From experience (and a believer in start with the simple stuff), have you checked your lower pulley to see if it might have decided to “walk”? My Delta was acting weird and lo and behold I saw it left a “smiley face” on the door.

View Alex Lane's profile

Alex Lane

515 posts in 4004 days


#9 posted 12-30-2017 12:11 AM

Thanks everyone! I did some checking today and the thrust bearings definitely need replacing. I was surprised that the bearing shown in the video is very difficult to spin freely even by hand. But the noise is coming from the lower thrust bearing. It spins freely but probably has no lubrication left in it. Both are adjusted properly, so as soon as I release pressure on the cut, the bearing basically chatters to a halt instead of coasting freely. I’ll get with the boss person at work to see about replacements.

Anyone have recommendations or experience with using the non-rotating ceramic thrust blocks?


That’s weird. The thrust bearing doesn’t look like it’s spinning much. If the blade touches it it should be spinning like a mofo. You might be able to pull a seal and clean it and repack it but that may or may not solve the problem.

They are cheap though. I like to keep a couple on hand personally.

- TheFridge


-- Lane Custom Guitars and Basses

View Alex Lane's profile

Alex Lane

515 posts in 4004 days


#10 posted 12-30-2017 12:14 AM

I recall the last time I tried to open the access door to the pulleys, the door was somehow jammed and wouldn’t open. I’ll try to open it when I can. Never thought of that even happening. Thanks!


From experience (and a believer in start with the simple stuff), have you checked your lower pulley to see if it might have decided to “walk”? My Delta was acting weird and lo and behold I saw it left a “smiley face” on the door.

- teejk02


-- Lane Custom Guitars and Basses

View Alex Lane's profile

Alex Lane

515 posts in 4004 days


#11 posted 12-30-2017 12:20 AM

You’re right it was definitely the lower bearing. I looked at it and the blade wasn’t snapping past anything though. The bearing itself is so horribly noisy that it is the source of the snapping chattering sound. The advice is much appreciated!


That noise has nothing to do with the bearing The blade is snapping back from going past something. The bearing definitely needs replaced. I would check and replace the lower thrust bearing at the same time and also check the adjustment of the lower bearing. The noise may be the blade pushing past the lower bearing then snapping back when the pressure is taken off it. Get the number off the bearing and go to a bearing house for replacement.

- johnstoneb


-- Lane Custom Guitars and Basses

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