good afternoon youtube so we're working on the uh 7 by 12 band saw today in the last few days
it's been making a really loud noise when i ran it and originally i thought it was probably the
guide bearings so i've got a new set of those on order it's kind of a crunching sound actually
took the blade off and i think what it is is this uh bearing that's in the worm gear shaft
this is where the noise is coming from and there's a bit of play in there
so you know first i thought okay it might be the gear oil i i checked that periodically and
i haven't had any leaks but it's this uh shaft here that's making all the noise so i need to try
to pull that apart and i don't know if there's a bearing in there if there's a bearing i need
to get the dimensions and then order one or two i imagine there's like two in there yeah just trying
to figure out how to get this thing apart okay youtube making a little more progress here i got
the uh old gear oil sucked out of the gearbox here so one thing i was having trouble with there was a
set screw here and originally i went and you know unscrewed the set screw and that's what came out
looking closer at it it had just broken off at the threads and basically broke off right at the
bottom of the hex socket so what i did was i got a drill bit in there and drilled a hole for one
of these square tapered extractors and jammed that in there and was able to get the rest of
the set screw out that was kind of puzzling i couldn't figure out what that set screw was for
it was a longer set screw and it just broke off on the top so looking at the parts diagram the
way this is set up there's a bearing at the top a bearing at the bottom and then there's a spacer
in the middle and it has a groove around it and i think that's what the set screw goes into and
holds that spacer inside the casting there's the round gear and then there's the spiral one those
are both pressed in and what you have to do is press out the one with the round gear on it that
has to press out this way from behind and then this shaft the worm gear or the spiral gear there
is machined as part of that shaft and then the two bearings in the sleeve are pressed onto the
shaft got the drive wheel off which was amazingly hard i had just put that on literally a month ago
and now the shaft just pushes through the bearing oh yeah there we go
i think that's just about there there we go so there's the gear and the shaft
and those gear teeth are kind of sharp and that is definitely a brass gear one note to myself there's
there was a spacer that goes under the gear there before it drops into the bearing so that
was off in the gearbox and you can see i popped the seal off the bearing there it's got a rubber
seal the bearing looks okay but one thing i notice is it's sticking out of the housing here
it's not driven in all the way and it's loose the outer race is loose inside of this housing so i
don't know if maybe it's just not installed right or something see if that'll actually fit in here
i just want to see if i can get this apart here or do i need to take this gearbox off oh there we go
it moved out a little bit i'm just prying up on the bottom of the worm gear
there well let me work on this a little bit more i got to move the camera because
i need to get right in where the camera is so i'll see if i can move this thing out
okay i've picked up my brass drift i keep this in my truck tool box for
working on the uh cone washers and stuff on the front hubs but i think this did the trick here
there we go so i think the gear is okay it's got a little bit of wear for that right side is is
tapered a little bit but uh yeah this is why that thing was so stuck in there that uh busted off set
screw kind of buggered up the spacer there oh it's this bearing this one is kind of crunchy feeling
but this one seems okay yeah i mean the thing is it's worn for sure but it's
still serviceable the teeth are pretty sharp so i think i might try to order
the new gear they like i said they have a steel gear now they say the brass gear is obsolete
at least on the grizzly page this is of course a harbor freight saw but they're identical same part
numbers and everything okay ran this through the parts washer and once i got the oil out
of there i think i found the problem this bottom bearing is shot okay it's come apart not too bad
i just had an old splitter i think i got that at harbor freight using it in the
20-ton shop press from harbor freight repairing a harbor freight bandsaw so
there we go done yeah there's that bearing so that one that one feels okay
okay there is a shoulder there that's what i was worried about i didn't know if there was a
shoulder and so you got the two bearing surfaces and it's turned down in the middle oh yeah you
can see how it's been heat treated there the bluing so yeah they must machine this
out of one solid piece of steel and then probably induction harden the worm gear
this is the bad guy i don't know if you can see the inner race moving there anyway yeah
i'll get those parts ordered and in the morning we can try putting this thing back together