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What's This on my Delta 14" Bandsaw?

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Forum topic by TheWoodRaccoon posted 12-31-2015 06:23 PM 761 views 0 times favorited 14 replies Add to Favorites Watch
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TheWoodRaccoon

364 posts in 397 days


12-31-2015 06:23 PM

I was admiring my newest shop acquisition, an nos Delta 14” bandsaw, when I noticed something on the rear next to the pulley guard. It looks like a place for an accesory? Maybe for some pulleys to vary the speed? Does anybody know? Paging MrUnix ! :)

-- still trying to think of a clever signature......


14 replies so far

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MrUnix

4247 posts in 1667 days


#1 posted 12-31-2015 07:22 PM

Your saw is a 28-2xx model. The ‘xx’ changes depending on how it’s configured, what motor, what stand, etc… What you are asking about is used on those machines shipped with an open leg stand and the motor mounted beside it, such as on this 28-275:

The hole is just there to provide a mount point for the drive belt guard.

Cheers,
Brad

PS: Sure hope you are planning on replacing the bearings on that machine before you start using it for real :)

-- Brad in FL - To be old and wise, you must first be young and stupid

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TheWoodRaccoon

364 posts in 397 days


#2 posted 12-31-2015 08:52 PM


Your saw is a 28-2xx model. The xx changes depending on how it s configured, what motor, what stand, etc… What you are asking about is used on those machines shipped with an open leg stand and the motor mounted beside it, such as on this 28-275:

The hole is just there to provide a mount point for the drive belt guard.

Cheers,
Brad

PS: Sure hope you are planning on replacing the bearings on that machine before you start using it for real :)

- MrUnix

I knew i could count on you, thanks!

Is there any particular reason i should change the bearings? Everything on the machine rotates freely and makes no noise, and thats good enough for me the way i see it. I’m a common layman when it comes to the science of bearings, so i’d apprecciate it if you could share your knowledge about beaings, like what to look for, when to change them etc. :)

-- still trying to think of a clever signature......

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MrUnix

4247 posts in 1667 days


#3 posted 12-31-2015 09:10 PM

Bearings have a shelf life… sitting idle for long periods (even just a year or so), the lubricant and binder will separate, leaving basically a waxy substance instead of grease. They will feel fine, turn smooth and otherwise seem perfectly normal. But once you start using it, the binder will not provide any lubrication and you will have metal on metal contact that will quickly destroy the bearing. But it’s your machine… if you want to chance it, go for it :)

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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TheWoodRaccoon

364 posts in 397 days


#4 posted 12-31-2015 09:14 PM



Bearings have a shelf life… sitting idle for long periods (even just a year or so), the lubricant and binder will separate, leaving basically a waxy substance instead of grease. They will feel fine, turn smooth and otherwise seem perfectly normal. But once you start using it, the binder will not provide any lubrication and you will have metal on metal contact that will quickly destroy the bearing. But it s your machine… if you want to chance it, go for it :)

Cheers,
Brad

- MrUnix

Do i run the risk of damaging the machine itself? Or will it just get noisier and not run as smooth over time?

How much do you think a new set of bearings will go for?

-- still trying to think of a clever signature......

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ElChe

630 posts in 804 days


#5 posted 12-31-2015 10:51 PM

Figure out your bearing sizes and get them from a bearing supply place. Get the sealed bearings over the shielded bearings. They are cheap anywhere from a couple of bucks per bearing to 10 bucks per bearing for unneeded high quality bearings. Don’t get them from Delta. Ripoff prices.

-- Tom - Measure twice cut once. Then measure again. Curse. Fudge.

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TheWoodRaccoon

364 posts in 397 days


#6 posted 12-31-2015 11:31 PM

Will the machine itself get damaged if i use bearings that arent good anymore?

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TheFridge

5765 posts in 954 days


#7 posted 12-31-2015 11:41 PM

Not unless it spins the bearing. Which isn’t likely.

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

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TheWoodRaccoon

364 posts in 397 days


#8 posted 12-31-2015 11:47 PM



Not unless it spins the bearing. Which isn t likely.

- TheFridge

Yeah, thats what i thought. The only way that could happen is if the bearing seizes completely. As of now, the bearings have no rust, no wear, and have been in storage for their lifetime. After sitting in the box for 17 years, the bandsaw’s wheels moved effortlessly on the first turn.

-- still trying to think of a clever signature......

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johnstoneb

2150 posts in 1640 days


#9 posted 01-01-2016 03:29 AM

You’re not going to hurt anything with those bearings. They will give you plenty of warning before going bad. You’ll have the seals drying up and leaking from sitting before the lube goes bad. Run them until they get noisy or start leaking then replace as needed.

-- Bruce, Boise, ID

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MrUnix

4247 posts in 1667 days


#10 posted 01-01-2016 06:21 AM

I would consider those bearings as already gone. They sat for a decade or longer idle, so the oil and binder have already separated and what’s in there is most likely just a waxy goo. Bearings have a shelf life (idle) of about three years under ideal conditions, while bearings that are in use can last many decades. They will appear to be fine, spin freely without any noise or play, but have little or no lubrication left and will fail quickly when put into use.


(Photo thanks to Bob Vaughan from this thread at OWWM)

Will it cause any damage if they are left alone for now? Maybe, maybe not – there is no way to predict how they will fail or what damage that failure may cause. You may get lucky, or you might wind up with a fairly expensive repair. If that is a risk worth taking – only you can decide.

How much will it cost? About $20 total for a pair of 6202’s (top wheel) and 6204’s (lower wheel). And they are pretty easy to replace (see the OWWM thread I linked to above). Motor bearings will be another $10 or so and are also fairly easy to replace. For me, that’s cheap insurance to prevent potentially much more expensive repairs down the road. YMMV.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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TheWoodRaccoon

364 posts in 397 days


#11 posted 01-01-2016 11:53 AM



I would consider those bearings as already gone. They sat for a decade or longer idle, so the oil and binder have already separated and what s in there is most likely just a waxy goo. Bearings have a shelf life (idle) of about three years under ideal conditions, while bearings that are in use can last many decades. They will appear to be fine, spin freely without any noise or play, but have little or no lubrication left and will fail quickly when put into use.


(Photo thanks to Bob Vaughan from this thread at OWWM)

Will it cause any damage if they are left alone for now? Maybe, maybe not – there is no way to predict how they will fail or what damage that failure may cause. You may get lucky, or you might wind up with a fairly expensive repair. If that is a risk worth taking – only you can decide.

How much will it cost? About $20 total for a pair of 6202 s (top wheel) and 6204 s (lower wheel). And they are pretty easy to replace (see the OWWM thread I linked to above). Motor bearings will be another $10 or so and are also fairly easy to replace. For me, that s cheap insurance to prevent potentially much more expensive repairs down the road. YMMV.

Cheers,
Brad

- MrUnix

Can you direct me to a place or give me a link where i can get the correct bearings for those prices? I have no idea where to go or what to look for exactly.

-- still trying to think of a clever signature......

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Fred Hargis

3950 posts in 1961 days


#12 posted 01-01-2016 01:13 PM

Accurate Bearing gets a lot of praise from the guys over at OWWM, but know what you are ordering…they don’t want to talk through 20 questions to figure out what you need. Or search for local suppliers and take them with you…BDI, Applied Industrial Technologies, power transmission companies and even industrial supply firms like McMaster Carr and Grainger may have a nearby location. For the record I would go with what you have and see if there is a problem….if they go bad it won’t be catastrophic and you can fix it then.

-- Our village hasn't lost it's idiot, he was elected to congress.

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dhazelton

2326 posts in 1764 days


#13 posted 01-01-2016 02:26 PM

Bearing and grease life is measured in hours of use, and that’s variable depending on load, speed, vibration etc. I would use the machine and check things periodically. According to OWWM sealed bearing shelf life is in the 10 year range.

http://wiki.vintagemachinery.org/Ball%20Bearing%20Primer.ashx#Bearing_Lifespan_3

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Nubsnstubs

826 posts in 1198 days


#14 posted 01-01-2016 02:47 PM

Raccoon, your location says you are in Brooklyn. I would think if you can’t find a bearing house within a block or two, you’re not looking very hard. Brad is probably right with the bearings you need, so just find the bearing supplier of your choice, and give them the numbers, get your bearings, and replace them. If Brad’s numbers are wrong, take them back and get the right ones…....... ....... Jerry (in Tucson)

-- Jerry (in Tucson)

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