I've a Sealey SM5 bandsaw (the generic small Taiwanese saw) that I bought in the early 1980's and has always been kept at my home workshop and has done sterling work over the years. I've had access to other saws so doesn't get too much use in recent years. The other week the blade broke during a cut - something that does happen every now and then and I couldn't remember when I last changed it so probably had my moneys worth out of it. I fitted a new blade (the last one from a packet of 5 that I bought a few years back. Since then, the blade will suddenly come off the drive pulley and stop - never completing a full cut. The blade is correctly tensioned and the pulleys are clean and tightly fitted to their spindles. My only thought is that the blade was not welded true such that there is a slight difference between the lengths of the top and bottom of it. Has anyone else had a similar problem? In due course I will get another new blade to try when I'm near to a supplier. Any thoughts?
- Thread starter Mikes
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Hopefuldave
Intergalactic pot-mender
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Have you tried adjusting the blade tracking? it's in the manual, section 7.3 " this adjustment should also be made whenever a new blade is fitted"
roofman
Purveyor of fine English buckets and mops
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If it was the same pack of 5 that i bought for mine then either sling the lot in the bin or face eternal mare and frustration getting the basards to stay on
...i bought a single branded named blade and fitted it, never had a problem again.
...i bought a single branded named blade and fitted it, never had a problem again.Thanks for the manual link. I've checked the guides recently and all good and the cut is fine when the blade is on the pulley. Did have a thought that maybe the guides which are just bearings might be seizing momentarily. I'm sure I've seen this written about before and think the answer was to buy some new good quality bearings. Will have a look again when next get 5 minutes.
You might be confirming my suspicion of a duff blade. I've seen some British made replacements so perhaps will order a few of those. Not much more than the imported ones either.If it was the same pack of 5 that i bought for mine then either sling the lot in the bin or face eternal mare and frustration getting the basards to stay on
roofman
Purveyor of fine English buckets and mops
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I think you have made the mistake i made too, changed all the settings on the rollers and guides thinking it was that...once a decent blade was fitted i had to spend half an hour putting the rollers back to a usable spec again.
Newlands
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Have a look a look at this - https://wiki.hsbne.org/_media/tools/4x6bandsawadjust.pdf
Whenever I change the blade on mine it needs checking. A new blade is very unlikely to be at fault.
Whenever I change the blade on mine it needs checking. A new blade is very unlikely to be at fault.
Interesting document written by someone who has met the same frustrations. Will give it a good read again and see if there is anything I've missed.
