Newbie with a SB9! need motor/countershaft help

[woodchucker]

any chance you have a picture of that tensioner lug on the headstock? and maybe of how the tensioner handle attaches? maybe mine doesnt have that provision.....

 

[keen99]

super helpful, appreciated!!

 

[keen99]

super helpful, appreciated!!

guess it's not going to atach here... I'm going to have to go look at that back gear a bit closer now.

 

[keen99]

looks like the headstock does have the hole for it, but......whatever the big added ring is for blocks it. that ring (obviously) moves with the shaft that engages the backgear, so maybe it was used to trigger something when the backgear was engaged/disengaged? I dont see an obvious way to remove it.

 

[keen99]

woodchucker is your rubber belt cut/glued on, or did you have to remove the spindle? shaft and pulley to get it on?

 

[woodchucker]

woodchucker is your rubber belt cut/glued on, or did you have to remove the spindle? shaft and pulley to get it on?

I removed the spindle. I did a complete teardown, cleanup and build it back. I had some parts that needed replacement.
BTW, your back gear is not orig. There were no parts welded on these, and that ring blocking your tension hole, is a cobbled up mess. Not sure why they added that? It never existed on the orig.

https://imgur.com/a/6OT4a

 

[keen99]

backgear torn down. it looks like the big ring was just welded/brazed to the end of the right side eccentric bushing? maybe someone had trouble with it pulling out? or maybe they had it rigged to trigger something (with that hole..) when the backgear was moved?

looks like I either need to cut that wheel off the end of it or find a replacement bushing? I only see the eccentric shaft bushings on ebay (vs the straight shaft this one uses).

oh, and I need to drill/tap/plug a oil hole, since the fabricated gear assembly doesnt have one.

 

[keen99]

tracked down a factory pivoting motor mount/counter shaft combo, btw - for cheaper than the time it would take to fabricate somthing, and my best guess says it's going to be the shortest option anyway. should be here next week. so I'll want to get that lever hole accessible.

have a felts kit on the way, ended up tearing the whole thing down and cleaning it up. haven't tackled the cross slide yet.

 

[piper184]

The care and effort you put into the tear-down, cleanup and re-assembly is going to pay you big rewards in the future.
Take your time, do it right and you will never be sorry about it.
Bringing old machines back to operational or better is oddly satisfying, to me anyway.

 

[Jake M]

tracked down a factory pivoting motor mount/counter shaft combo, btw - for cheaper than the time it would take to fabricate somthing, and my best guess says it's going to be the shortest option anyway. should be here next week. so I'll want to get that lever hole accessible.

have a felts kit on the way, ended up tearing the whole thing down and cleaning it up. haven't tackled the cross slide yet.

The factor motor mount/counter shaft assembly is probably a very prudent way out of that situation. What's there obviously worked, but as I'm sure you know, 90 percent of the effort, and 90 percent of the functionality, is in the last ten percent of the details when you're building things off of the stock rack...

The factory back gears are long gone on that machine. Broken teeth is a common failure. (Typically from stuck chucks, poor judgement, and big hammers). I don't know as I'd run off after a factory offset bushing just yet. (But maybe, if the dimensions line up) My guess is that this "wheel" was a more convenient handle to engage/disengage the back gears, since they obviously wouldn't be needing a tension lever, as the "good enough" counter shaft was done without it. The bushings are both locked to the straight shaft, and should both turn with it. You don't need that "wheel", but that exact bushing fits, and (apparently) does it's job.
I think I might see some gold color where that wheel is joined to the bushing. If it's braised, it can be released with heat. (Torch heat, you're not gonna do that with a propane torch). Were that me, that's how I'd start off. Doing what it takes to separate that wheel from the existing excentric bushing.

It's pretty obvious that this machine had a hard life, but it looks to have been in the hands of somebody quite capable. Maybe a dedicated machine for "some" operation(s) The repairs on the backgears (quite possibly the spindle gears as well), the remade cross slide handle. "Original might be gone, but it looks to be in a condition that could be very functional, probably even proper looking, with very reasonable effort.