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I just bought an SA-250, which is probably more than 20 years old, and as there was a wobble on the stone, I changed the bushings. There was a small amount of wiggle room, but I think acceptable. I don't think the bushings made any difference. The stone, however, was very untrue.

Yes, the wheel was definitely very untrue, and I enjoy doing this kind of fiddling, and I really enjoy putting a good tool back to work. If not I should probably just get a new unit and not bother with old machinery I will not wait long before truing it again, to prevent it from getting untrue. I have tried a bit with a couple of chisels, but I'm not doing it quite right yet. I have the old jig, though. SE-60 or something like that.

Anyway, I'll just start learning from the threads here and the videos, and doing a bit of truing now and then Thanks again, this is a great forum.

Got the truing tool yesterday, and after about an hour of grinding, I managed to get it true. Yes, it was badly untrue, and I had to take small turns, about half a grade on the microadjuster, with the diamond bit going back and forth for each half grade. Now I just have to learn using the tool. Thanks for all your advice!

There seems to be some uneven-ness on the part of the honing wheel that goes between the nut/washer and the shaft. Might have been overtightened at some point. Shaft is straight. It's not crucial that the honing wheel is unwobbly anyway.

I also was able to mount the horisontal mount and the old universal stand, so now I have both ways! Nice when doing freehand.

Of course, rolling the shaft on a flat surface would tell. I can't see excessive lateral movement on the grindstone. As you say, it's some different colors/patterns. Thanks for your suggestions, I will check for cracks as well.

Received the BGM-100 and new bearings. Still waiting for truing tool. The BGM-100 stand fits nicely. Bearings are installed, but there's still a wobble. Mostly up and down on the grindstone, which should mean untrue stone, right? But the honing wheel has some insane sideway movement. Please have a look at this video. Is the shaft warped? I guess it's difficult to tell. This machine just got a bit more expensive than I thought, so I'm a bit hesitant to buy a new shaft.

https://www.youtube.com/watch?v=arv1SISCF_c&list=UUOX_0p43Kkl-4N8HwQYiMrA

Thanks again for the wisdom, I'm reassured that the BGM-100 and its included stand will fit. I've taken out the shaft and inspected all parts. Shaft does not seem bent compared to the universal stand. The bushings have about 0,5mm of play. They are just plain all around, not exactly like the ones I've seen for T7, but I assume the diameter is the same? 16mm inside for shaft, and 22 mm on the outside (the hole on the frame). I'll just order them tomorrow anyway, with the BGM-100.

A pic of the shaft and bushings:

https://www.dropbox.com/s/brv57l3enjqpy0e/2014-08-03%2021.09.39.jpg

I, thank you for all the kind replies and warm welcome. I have not found any serial on the machine, but I will check again? However, this machine has two locking screws for the universal stand, and the stand diameter of 12mm. I've read thru numerous threads here, and gathered that the SG-2000 and T-7 also have the same dieameter. I am pretty sure the US-105 will fit, and then the BGM-100 likewise should fit, right? The BGM-100 being just a normal stand, just with horisontal brackets?

Other than that, the machine seems to be working right, although there is a slight wobble. I think I will be able to sort it out with the truer. The axle nylon bushing seems fine, but I should probably just swap them anyway. The axle just  has some surface rust on the grind stone end, which I think would be normal after a couple of years of use. I haven't checked if it is bent, but I'm thinking that would be very unlikely? I don't think the machine has been used that much, as the diameter of the stone is close to 24 cm. 

Hi there. I found this terrific forum after buying a used SA-250. I need a truing tool for this grinder, so I already ordered TT-50 and the US-105, which is necessary to get the micro-adjusting screw. But after I ordered this, I saw the BGM-100, which seems to offer both the horisontal grip, micro-adjuster and universal stand. Would I be better off ordering this, getting the horisontal grip/fasteners too? I take it would be possible to mount this hardware on the SA-250 just by drilling a couple of holes? Any thoughts on this?

Not sure if I need the horisontal stand, but I imagine it would be nice when grinding away from the edge. I will mostly use the grinder for planers, axes, knives and chisels.

Thanks.

Edit: Added wobble problem in title.