My lathe belt just broke

[dai sensei]

:upset::fit::rant2::banghead::cry4:

Just started on roughing out no.4 Blue Gum bowl and bang, everything stops. Guess I should be greatfull the belt lasted this long. It is an old JET 1442 over 7 years old, has been through the fire and I do push the lathe to its limits :-.

Although the bearings seam Ok at the moment, since I am replacing the belt, replacing the bearings at the same time makes sense since as you have to pull the whole headstock apart to replace the belt.

I could probably do it, but seams like a job for the pros to ensure it is all done right and have a good check over at the same time.

Apart from the Xmas season, it is Sunday so I can't do anything today. GPW is shut till 12th, but JET up in Bris is open tomorrow (I rang yesterday to try and get new tyre for my bandsaw which also broke yesterday :((). Have no idea how much they would charge yet, I'll ring tomorrow. Also how much time it takes to service the beast :?

So what do you think, get the pros to have a look or fix it myself?

[wheelinround]

I thought you were a Pro Neil :D

If Munruben can fix his you should be able to do yours :p

Less money spent on repairs is more money for tools :2tsup:

What you'll need for the lathe bearings bought through bearing supplier cost half what you'll pay through Jet etc. May even get a belt through them also.

Tyre for the BS well as your going to get that you may as well buy the other parts to.

[robutacion]

:upset::fit::rant2::banghead::cry4:

Just started on roughing out no.4 Blue Gum bowl and bang, everything stops. Guess I should be greatfull the belt lasted this long. It is an old JET 1442 over 7 years old, has been through the fire and I do push the lathe to its limits :-.

Although the bearings seam Ok at the moment, since I am replacing the belt, replacing the bearings at the same time makes sense since as you have to pull the whole headstock apart to replace the belt.

I could probably do it, but seams like a job for the pros to ensure it is all done right and have a good check over at the same time.

Apart from the Xmas season, it is Sunday so I can't do anything today. GPW is shut till 12th, but JET up in Bris is open tomorrow (I rang yesterday to try and get new tyre for my bandsaw which also broke yesterday :((). Have no idea how much they would charge yet, I'll ring tomorrow. Also how much time it takes to service the beast :?

So what do you think, get the pros to have a look or fix it myself?

Hummmmmm, Mr., time to go trough the missus drawers and find a pair of stockings...!:o
That will keep you going for a while, at least until you get a replacement belt.
I also believe, that replacing the bearings now, it will be a good idea. In my opinion, if you don't know how, have the tools for doing the job, don't do it. Damaging the new bearings on installation, is very easy to do. I've seen a thread here somewhere where the fellow done an excellent WIP while replacing the bearings on his lathe, some of the secrets of using the lathe to repair itself, type of thing...!
The job itself, is not difficult, it just require a bit of patience and a bit of an idea of what to do and how!:roll:.

As you said, you're lucky that lasted that long, but like most things in life, good or bad, they came in waves, not bad luck, just an inconvenience and expense.!:C

Good luck!

Cheers:2tsup:
RBTCO

[texx]

i dont know what type of belt jet lathes use but here is a tip more for the v belt type lathes but is handy for all.
this is what we do with our old fiat dozer . the thing is a mongrel to change fan belts on and they do break ( sticks and stones and so on ) .
on the old fiat i have to pull a lot of the front off to get at and change the belt so we always put 2 on when we do it , there is only a pulley for one but we put another in there and wire it up so it cant rub or catch on anything , then when you break one the other is already in there just have to drop it on the pulleys ,could work with a lot of lathes to me thinks :2tsup:

[Grumpy John]

Neil,
Not sure about your model Jet, but on my 1642 the bearings are relatively easy to remove and replace (bear in mind I spent the last 10 years as a service engineer installing and servicing machine tools). I know this as I was bored one day and decided to see how the bearings were holding up (my lathe is just over 3 years old). The bearings were fully sealed and still in perfect condition. A tip for the novice, take plenty of photos as you go, because you WILL forget which way round and in which order things were. If you still have the original manual there is an exploded view of the headstock in it including part numbers. PM me if you need some moral or even some immoral :D support.

[Harry72]

Put a link belt on it no need to pull her down.

[dai sensei]

Thanks for the quick replies.


I thought you were a Pro Neil :D

Are those were the days, or were you talking about wood turning :U:U


Tyre for the BS well as your going to get that you may as well buy the other parts to.

I managed to reglue on the old broken tyre, with a piece of tyre tube in the small gap to get me going again. I will still get a new propper tyre in case it gives way again, they are not that expensive.


Put a link belt on it no need to put her down.

Hummmmmm, Mr., time to go trough the missus drawers and find a pair of stockings...!:o
That will keep you going for a while, at least until you get a replacement belt.


Nah, it is a variable speed lathe with a V belt, with teeth on the bottom, to suit the changing dia fly wheel.


I also believe, that replacing the bearings now, it will be a good idea. In my opinion, if you don't know how, have the tools for doing the job, don't do it. Damaging the new bearings on installation, is very easy to do. I've seen a thread here somewhere where the fellow done an excellent WIP while replacing the bearings on his lathe, some of the secrets of using the lathe to repair itself, type of thing...!
The job itself, is not difficult, it just require a bit of patience and a bit of an idea of what to do and how!:roll:.

Hmm, I have the tools and knowledge, but patience :no:


Neil,
Not sure about your model Jet, but on my 1642 the bearings are relatively easy to remove and replace (bear in mind I spent the last 10 years as a service engineer installing and servicing machine tools). I know this as I was bored one day and decided to see how the bearings were holding up (my lathe is just over 3 years old). The bearings were fully sealed and still in perfect condition. A tip for the novice, take plenty of photos as you go, because you WILL forget which way round and in which order things were. If you still have the original manual there is an exploded view of the headstock in it including part numbers. PM me if you need some moral or even some immoral :D support.

I do have a detailed manual and this one does have sealed bearings, three of them, all different sizes :(. There have been a few funny noises since the fire, so I have no problems with replacing them if I give it to the pros. I'm sure I could do it, but my chances of damaging them, or getting them back to front on reassembly are pretty high :U

I've been asked to go diving at a wreck tomorrow morning now, I love holidays, so I will ring JET when I get back to see how much it is which will affect my decision.

[Toolin Around]

:upset::fit::rant2::banghead::cry4:

Just started on roughing out no.4 Blue Gum bowl and bang, everything stops. Guess I should be greatfull the belt lasted this long. It is an old JET 1442 over 7 years old, has been through the fire and I do push the lathe to its limits :-.

Although the bearings seam Ok at the moment, since I am replacing the belt, replacing the bearings at the same time makes sense since as you have to pull the whole headstock apart to replace the belt.

I could probably do it, but seams like a job for the pros to ensure it is all done right and have a good check over at the same time.

Apart from the Xmas season, it is Sunday so I can't do anything today. GPW is shut till 12th, but JET up in Bris is open tomorrow (I rang yesterday to try and get new tyre for my bandsaw which also broke yesterday :((). Have no idea how much they would charge yet, I'll ring tomorrow. Also how much time it takes to service the beast :?

So what do you think, get the pros to have a look or fix it myself?

There's nothing tricky in a lathe like yours - you'll be wasting money paying someone to do it. Here's the link to the manual for yours http://content.jettools.com/manuals/m_708358k.pdf

[DJ’s Timber]

:wts:

Its an easy job, got my VL300 apart at the moment due to a noisy bearing, new bearings sitting in the car waiting for me to put it back together :roll:

[NeilS]

Put a link belt on it no need to pull her down.

Unless I was convinced that the bearings are ready to be replaced, I'd be with Harry and go with a link belt and save myself from having to pull the headstock assembly apart before necessary. Not difficult to do if done methodically, but, unless you prefer to muck around with machines to woodturning, why do it before you need to. Unlike a belt that can break and stop play, bearings usually give you a lot of warning before they finally pack it in.

Not being familiar with the 'teeth' you refer to on your bottom pulley, I assume that a link belt would work OK with that, but not sure.

If you do go with a link belt, buy a few extra links to get you going the next time the belt breaks during a long weekend...:D

Should you go with a traditional belt which requires you to pull the headstock assembly apart, or when you do replace your bearings, consider a tip from who recommends adding a spare (2nd) belt over the the shaft while you have everything apart. Only possible if your headstock has enough room to store the second belt in place without interference, but smart move if you can manage it.

Neil

[Ed Reiss]

Just a word of caution Neil...what with all the belts breaking around the same time, you might just want to wear suspenders for a while!!:doh:

[dai sensei]

I pulled the beast apart today. Got the belt off fairly easily, the bearings are a different matter. The bearings seemed Ok though, ran smoothly without any bumps so I have left them in. The belt on it was marked as a 9.5x640. I rang the only belt shop down here (this week anyway) and he could get a 9.5x620 or a 9.5x660, but no 640 so he recomended I give JET a call.

Called them up and they said the had the M25 belt, that is called up in the manual for the 1442, they also had a tyre for my bandsaw. So off I drove to Bris, 1 hour from where I am. When I got there the M25 belt was totally different. Apart from being a standard V belt instead of a belt with teeth, it was also a larger diameter :?. I could imagine being smaller, without the teeth its inside dia would be smaller I thought. Anyway, I was there so I bought it hoping it would be Ok.

Got home and installed it, but it was definately too big and came off at half maximum speed. The old belt is 640 (~25") outside dia, the new belt is 25" inside dia :doh:. It is an old machine, so perhaps they have changed the specs? My old manual got burnt in the fire a few years ago, so I have been using the manual off the net, that is for the new model. I did search for other manuals and found another manual that says the belt is a 3V-250, not sure what that means though.

I didn't try it for the lower speed, perhaps it will help me slow the slowest setting, something I need for those unbalance big blanks. I will take the old belt down to my local belt man and see what he can do for me, he was previously only looking for a toothed version. If I don't need the teeth, I will also look at linked belts.

[robutacion]

Hi everyone,
Can we get link belts for a Nova 1624-44?

Cheers:2tsup:
RBTCO

[Sawdust Maker]

Hi everyone,
Can we get link belts for a Nova 1624-44?

Cheers:2tsup:
RBTCO


trade it in on the DVR XP - don't need belts then :D

[Woodwould]

Any local power transmission specialist should be able to supply you with Thoro-Twist multi-link belting. Powergrip (http://www.powergrip.com.au/PG_Transmission_BTR.htm) sell another version and Blatch (http://aablatch.com.au/belts.html) sell Fenner products so may well stock Power Twist (http://www.fennerdrives.com/high_performance_composite_vbelts/powertwist_home.asp) multi-link belting.

Multi-link belting run a lot smoother and quieter than continuous belts and will therefore save your bearings too. They're ideal for small machinery like lathes.

[dai sensei]

Thanks for the link Woodwould, I can identify mine is a variable speed cog belt. Those power twist link belts probably would work, but I managed to get a copy of the orginal and then forgot to ask about link belts :doh:

I actually took my old belt into my local belt shop and I managed to score a SPZx630 that was perfect :woot:. It is the same as what used to be the 3V-250, the M25 may suit the new models, but not mine. I also bought 2 :rolleyes:




Lessons learnt, when buying belts:
Talk to someone that knows about belts rather than someone that knows about lathes
Takes your belt in, don't discuss it over the phone (standards and specifications change) as your description may not match their perception of what you are describing :-
Buy a spare so next time you are not caught out
I also know how to dismantle my lathe headstock to replace the belt (and it is not that easy with the variable speed pulleys!). I found how to get two of the bearings out, but never progressed enough to remove the front bearing, but I am sure I could manage it. I never actually asked the JET people how much or how long it would take, the people I talked to was not the service person anyway, so probably knew as much as I did (no offence intended, just IMHO).

[bobsreturn2003]

try a gates , brand green belt run smooth last a lot longer . bearing services or similar should have one , the tooth belt sounds like an automotive belt type . perhaps try auto stores ,when they are open . cheers bob