LumberJocks

Jointer Vibration (Jet 8")

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by BroncoBrian posted 06-25-2018 02:49 AM 709 views 0 times favorited 10 replies Add to Favorites Watch
View BroncoBrian's profile

BroncoBrian

875 posts in 2375 days


06-25-2018 02:49 AM

I’ve got a Jet JJ-8HH and I feel like there should be a little less vibration. Not sure if I would know what is reasonable or not.

Any suggestions?
-It sat for over a year without being used, so possibly the belt has a flat spot?
-Will a link belt always help?
-It is on a mobile base, I did get some improvement when I balanced the adjustable rubber feet.
-Teeth are all good, head is clean, <3 years old, limited use.

-- A severed foot is the ultimate stocking stuffer.


10 replies so far

View Alan72's profile

Alan72

221 posts in 2449 days


#1 posted 06-25-2018 02:54 AM

check to see if the motor pulley is loose.

View Rich's profile

Rich

4549 posts in 1005 days


#2 posted 06-25-2018 04:06 AM

Yeah, regular v-belts can develop a memory pretty fast. For sure in a year. Go for the link belt. Unless there’s something out of balance on the head, that will surely smooth it out.

-- Knowledge is not skill. Knowledge plus ten thousand times is skill. -- Shinichi Suzuki

View MrUnix's profile

MrUnix

7404 posts in 2615 days


#3 posted 06-25-2018 04:54 AM

Link belts are not the panacea a lot of folks seem to believe them to be. They do tend to help on machines where the belt tension is due simply to motor weight, like on contractor saws, or where changing a belt would require a lot of disassembly to remove/install – but they generally do little for machines with fixed mounts in standard configurations. They also are significantly more expensive, typically more noisy, will stretch over time, and can chew up die-cast pulleys. Standard v-belts will typically take a set if left sitting idle over time, but it can be removed by using the machine for enough time to let the belt heat up a bit. A lot of folks also say linked belts are good for applications where there is a relatively small sheave involved, but in those circumstances, a cogged v-belt is a better alternative IMO.

I would run the machine for a while to see if the vibration goes away, and look for other possible causes, such as misaligned pulleys, a problem with the belt itself (like a chunk or rip in it), or debris/pitch accumulated on the cutter head causing a slight out of balance condition. YMMV.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

View Rich's profile

Rich

4549 posts in 1005 days


#4 posted 06-25-2018 05:09 AM


Link belts are not the panacea a lot of folks seem to believe them to be.

YMMV.

- MrUnix

My mileage has varied. You’re welcome to your opinion, but my jointer runs smoothly and quietly and my link belts have neither stretched, nor have they chewed through my pulleys. Besides, if they did stretch, I’d take a link out…lol

The idea that a v-belt will smooth itself out over time has never shown true in my experience either. I switched all of my tools to link belts a couple of years ago and never looked back.

-- Knowledge is not skill. Knowledge plus ten thousand times is skill. -- Shinichi Suzuki

View BroncoBrian's profile

BroncoBrian

875 posts in 2375 days


#5 posted 06-25-2018 02:24 PM

Rich / Brad

Thank you both. I will check out the mounts and make sure that everything seems to be tightened. I suspect that I am experiencing the initial break-in and need to retune it.

I’ve adjusted the feet to make sure it is stable and cleaned the head. There was some build up of mahogany dust, which is very fine, using a toothbrush. I think it made an improvement.

I understand that climate effects the belts a lot. I am in CO, they dry out here. My PM band saw was squealing one start/stop until I rubbed some soap on the belt. Oddly that worked great. Woodcraft tip.

Could I have the tension too tight or loose?

-- A severed foot is the ultimate stocking stuffer.

View Joe Lyddon's profile

Joe Lyddon

10640 posts in 4468 days


#6 posted 06-25-2018 06:12 PM

YES!!

A Link Belt will make a HUGE difference!!

I use these… They work great!

Harbor Freight
Vibration Free Link Belt

Accu-Link- item#43771
Rated 4.82 out of 5 stars
144 Reviews

They got smart… the price used to be a lot lower… Still a very good Buy!

$32.99

Hope this helps…

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: https://www.ncwoodworker.net/forums/index.php

View TheFridge's profile

TheFridge

10858 posts in 1902 days


#7 posted 06-25-2018 09:25 PM

Is it consistent? Mine resonates a bit but I deal with it.

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

View BroncoBrian's profile

BroncoBrian

875 posts in 2375 days


#8 posted 06-25-2018 11:13 PM

It is consistent. I don’t think it is motor, I expect belt or balance. Heading out to mess with it now.

-- A severed foot is the ultimate stocking stuffer.

View Tony_S's profile

Tony_S

976 posts in 3499 days


#9 posted 06-26-2018 10:28 AM



Link belts are not the panacea a lot of folks seem to believe them to be.

Cheers,
Brad

- MrUnix

I’ve got 20-21? pieces of machinery in the shop….probably in the neighborhood of 100+ different belts of varying lengths sizes from 20 to 170”. I’ve never understood what the popularity or need for a link belt was about, because in 25-30 years, I’ve never had the need for one. I don’t think I have anyways? lol!.
Out of curiosity, I asked a couple of opinions, one a 30 year millwright, he’d never heard of a link belt. Another 15-20 year millwright said they were just an expensive solution searching for a problem?

The only time I’ve ever really cursed a standard V belt is when they stretch. They can slip or flutter, but re-tensioning is a 15 min fix in most cases.
Flat spots on new (shorter) belts have always relaxed out in a couple of days. If they didn’t, I would suspect that manufacturers wouldn’t sell them in packaging that creates flat spots.

-- It is the mark of an educated mind to be able to entertain a thought without accepting it. Aristotle

View Joe Lyddon's profile

Joe Lyddon

10640 posts in 4468 days


#10 posted 06-26-2018 05:47 PM

Link belts: I have used them and have noticed a Significant improvements.

I inherited an old Delta 4” jointer… old v-belt… when turned on, clunk – d – clunk & bouncing around… The belt obviously needed replacing because of a bad spot that had developed.

I replaced it with one of these HF Link belts… SMOOTH AS GLASS… Major improvement!!

Link belts DO NOT FORM bad spots as the result of sitting a long time in the same position.

I made a Sander using a typical motor… went directly to a Link belt… SMOOTH as GLASS…

Perhaps a NEW V-Belt would have also been smooth as glass… BUT I DO KNOW that it will eventually form bad spots after sitting in the same position after a while… The Link belt will continue to be Smooth as Glass… no matter how long it sits in the same spot.

I know this from actual experience… NOT just a Theory… or thought…

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: https://www.ncwoodworker.net/forums/index.php

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com