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Thread: Change belt on Tough lathe
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30th December 2018, 09:14 PM #1Member
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Change belt on Tough lathe
Hi,
I am trying to change the belt on my new to me Tough lathe. I have found two grub screws on the gears and removed the two cover plates (and one washer). I then bodged up a puller arrangement to pull the spindle towards the tail stock. This has not budged the spindle at all and I am worried about breaking it by applying more force.
Does anyone with a similar lathe know if I have missed something?
Thanks
Pete
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30th December 2018 09:14 PM # ADSGoogle Adsense Advertisement
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30th December 2018, 09:56 PM #2
If you don't need to change the bearings then get something like this
Rick
https://www.carbatec.com.au/machiner...tion-reduction
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30th December 2018, 10:03 PM #3Member
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I have already bought a belt for 5 dollars and would prefer not to spend for a link belt.
Thanks for the suggestion.
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30th December 2018, 10:35 PM #4China
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That puller will destroy your bearings, and most likely not remove them, the puller must put pressure on the inner sleeve, otherwise it will have too much flex
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30th December 2018, 10:59 PM #5Member
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Sorry mate I dont understand, is there a sleeve inside the spindle? Can you not pull a spindle through the bearings?
Thanks
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31st December 2018, 12:54 AM #6
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31st December 2018, 04:12 AM #7GOLD MEMBER
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Stone Monkey,
Carefully inspect to be sure the spindle does not go out the outboard side of the head stock. This photo shows what looks like a nut on the inboard side. If you have that, unscrewing it may let the spindle go out the outboard side.
Soak everything with penetrating oil - liquid wrench, WD-40, your favorite mouse milk.
Hopefully a Tough owner will chime in.
Check to see that anywhere a set screw presses on the shaft has not raised a burr. If so wrap 120ish grit sand paper over and remove burr.
Good that you are using a puller, hammering on a spindle can ruin bearings.So much timber, so little time.
Paul
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31st December 2018, 08:27 PM #8Member
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No double set screws and no nuts visible, broke the nut off the dodgy puller, too scared to give it another go. Looks like I am going to have to fork out the bucks for a link belt.
Thanks for all the help.
Cheers
Pete
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1st January 2019, 08:56 AM #9GOLD MEMBER
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Seen this thread?
Drive Belt Replacement
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7th January 2019, 10:53 PM #10Senior Member
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the thread mentioned above shows it can be done, I used to have one years ago and replaced the belt and bearings. I don't remember it being overly difficult. However make sure you are pulling it the right way, as the shaft may be stepped.
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9th January 2019, 09:18 PM #11
Don't know if you have bit the bullet yet and purchased a link belt but if you haven't, that shaft should be able to be removed without too much trouble.
Firstly I can see a lot of rust on the shaft sticking out the back. I would clean that off with some emery cloth or sandpaper first as if the shaft does start to move the rust will make it tight going through the bearing. I would also see what parts of the shaft you can get access to inside the headstock and clean any rust off there too. As Paul says, plenty of soaking with a penetrant for a couple of days.
In regards to your puller, your idea is good but it is too weak if the shaft is tight. What you need to do is remove the timber from the back end of the shaft and put a piece of steel between the nut and shaft. A piece of 1/4" or thicker steel plate with a hole drilled through it to allow the bar to go through will do or even a stack of good heavy large washers. On the other end you can still leave your vertical pieces of timber there but again you need to back them up with a piece of steel plate, the thicker and larger the better. Without the steel the nuts and washers will just pull into the timber because it is so soft and not actually apply much force on the shaft. When you do set it up as described above, apply a good force with the puller and if the shaft doesn't move initially you could place a piece of wood against the back end of the puller and give it some sharp firm hits with a hammer(not full blooded blows) which should jar it from the position it has been sitting for years. Once it starts to move the puller should just draw it out.
Once you have it out give the shaft a good clean up removing all the rust and when you put it back in, apply some antisieze if you have it or plain old grease on the surfaces that mount inside the bearings so that any future removal will be easy.
Hope this helps.Dallas
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16th January 2019, 08:52 PM #12GOLD MEMBER
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Wondering if you managed to change the belt Stone Monkey?.
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17th January 2019, 01:33 PM #13Member
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I got a link belt and did it that way. More expensive but less chance of breaking anything. Thanks for all the help.
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22nd January 2019, 06:05 PM #14GOLD MEMBER
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