Thread: Taiwanese bandsaw parts

I was cutting some 100mm steel today with my Taiwanese 4x6 bandsaw and noticed the gearbox was making funny noises and getting very hot. So I opened up the gear box and to my dismay i found the worm gear was worn out
Are spare parts available for this machine as i really don't want a new saw just because there is one stripped gear.

You have a few options, one is to make one, the other is to go to places like H&F and see if a Taiwanese one fits or can be modified to suit. I just thought of a third option and that is to contact Newcastle Gasweld to see if they have a spare as they sell the Taiwanese saws and usually have a good spares back up for there gear.

Also, maybe a member here could measure there worm gear off a recently purchased Chinese saw to see how it measures up. I may only need machining or a bush put in to fit.

Dave

Thanks Dave, here are some photos of the damage.

Andre,
you need to have a poke around and try to work out why it's worn out. From the photos you've posted the wear looks to be on one side of the gear (that is, not central to the plane of the gear), so I'd start by checking the alignment & bearings. Perhaps also check the worm to make sure that it hasn't slipped. In a normal worm and wheel arrangement the axis of the worm should be on the centre plane of the gear and the axis of the gear on the mid-plane of the worm (I hope that's clear).
Let us know what you find.

Michael

Michael I think you hit the nail on the head, The drive pulley for the band always drifted about 10 mm off the driving shaft I think this is because the bearings have moved thus causing the wear on the edge of the gear.

If you can get things to move over and run on the unworn part you will probably get years more use out of it. From memory the mate to it is steel so you wont be damaging it, only this gear if anything was to happen.
Worth a try I think and will be a cheap fix.

Dave

Well it was an easy fix until i didn't think and tried to press the gear off the shaft. I put the press plates under the bearings instead of the the gear, it worked untill the bearings reached the key in the shaft and sized one of the bearings and the oil seals

A new bearing will only be around $5, may as well do both while your there.

Dave

Yep!
For the small price of some new bearings I would can the old ones.

Is it just colour in the pic or do the bearings have a decidedly bluish tinge to them indicating some heat build up.

You may be wish to check the lube arrangement for them.
Grahame

I agree with Dave. If you can clean up any damage with a file you might be able to reuse the existing gear. Change the bearings. If you got a bearing shop make sure to ask for trade pricing. The mark-up between that and "Mug off the street" pricing can be steep. Keep the old ones as they may come in handy for something (spacers, lap rollers etc)

Michael

A few minutes later - While you are there, draw up a bit of a sketch of the parts in there, noting seal/ bearing numbers and dimensions of the other bits like keys gears etc. Most machines don't have enough detail in their parts manuals so get the detail while you are in there. It means next time you need to do something (say replace the oil seal) you already know what it is. You could also make up a spare worm gear at your leisure for replacement in the future

G/day Welder,
I'm a bit of a lurker/new here, I replaced that gear in my bandsaw, yours looks the same, I got the gear from Hare & Forbes, go here B002 | BS-4A Metal Cutting Band Saw | machineryhouse.com.au and make sure that it is the same, mine was a much older saw but the gear was the same, then click on the brochures & manuals tab and you will find a list of downloads for that saw including a parts list, the gear was about $66 from memory.

The reason your gear was damaged is because the band wheel slipped and the shaft moved upwards and put the gears out of alignment, also there is supposed to be a spacer between the band wheel and the bearing, when the band wheel is pushed up to that the shaft end float is eliminated, the spacer also has to be the correct length as this also adjusts where the blade stops in relation to the bed when the cut has finished.

I hope this helps

You could also try to contact the manufacture of the machine I did this with a Taiwanese milling machine and they supplied me with parts for a 25 year old machine

Hi Shedhappens, welcome. Now you have one post you had better go over to the show us your shed thread and post there.

Andre,
You could probably buy a new part but why not cut a gear hob and make a gear just for the experience? I often make things that i could just buy, especially if i think i will learn something useful in the process.
Keep up the good work,
Ewan

I agree with Ewan, good to have another member Shedhappens.

Dave

I might make a hob , which i am asuming is like the worm execpt with flutes?