I've been offered a surface grinder

[Sunset Machine]

Taper per foot it is. Looks like that's a standard though.

Dimensions here:
http://www.wmsopko.com/sopko_04_to_30.htm

[PixMan]

(12-21-2014, 10:32 AM)Mayhem Wrote: Thanks Sunset.  Fortunately I have already made up puller and the pin wrench will also be an easy job.

Besides $30, what is the difference between a 7" and an 8" adaptor?  I cannot see anything in the first link that suggests that adaptor is a 7" one.  My guess is that the 7" doesn't have the balancing weights, as Ken had mentioned this previously.  Also, what is the that poking through the nut/washer in the picture??

Darren,

It's not common to have to balance 7" wheels, and debatable with 1/2" wide 8" wheels. When I use my 1" wide 8" wheels I do put them on the one balancing adapter I own but I just "guess" at balance because I've not had the urge to make a balancing stand and arbor.

As for the "what is poking through the nut/washer in the picture", that's just a keyway in the 1-1/4" diameter to mate with the keyed washer and keep it from spinning as you tighten the wheel onto the adapter.

Your machine should take the standard and very common 3.00" taper per foot adapters just as mine and so many others do. I had bought about a dozen of them from various eBay sellers over a period of 2 years, including the one new balancing style. There's a seller on the US eBay site, "supramachine" who is the US distributor for Acer machines and they sold me that adapter for $50. I like it because it's the best I have for the wide, Ø8" wheels.

[Mayhem]

Thanks Sunset,

Interestingly the cross-sectioned pictures of the adaptors in your last link show a parallel section of the arbour, with a taper before and after.  My spindle is a continuous taper, as shown in my drawing and seen here in this photo:

   

Thanks Ken,

My adaptor doesn't have a keyway and my eyes deceived me when first viewing the picture!  I'm going to keep my eyes out on eBay but have other things to do before loading up with wheels.  That said, if a bargain comes up I'll likely grab it.

[Mayhem]

I finally got around to wiring her up and flicking the switch. Nice and quiet, which is always a good sign. Now that I know that the motor and bearing are good, I decided to spring for a magnetic chuck. Local supplier has a 6" x 18" chuck listed at $660 (down from $990) ex. Sydney. I told them that I wasn't going to pay for them to freight it over and after checking with his boss, he agreed.

It is more than I wanted to pay but considering I got the grinder for $150, I guess I cannot complain too much. I will still come out well ahead of what I have seen similar machines, with chucks go for.

Next I will have to get a diamond dresser and a wheel!

[tekfab]

Good on yer cobber, i'll know who to ask when i have problems with my grinding  

Mike

[Mayhem]

(01-24-2015, 08:51 AM)tekfab Wrote: Good on yer cobber, i'll know who to ask when i have problems with my grinding  

Mike

Excellent Mike - let me know as well please, I'm sure I'll need his advice too...

[Mayhem]

This turned up:

   

Made by the Tai Chong Company out of Taiwan.  I still need to locate it accurately.

[DaveH]

That is very nice  
 
DaveH

[PixMan]

You have a good looking chuck there, very nice.

No need to get crazy lining it up, just get it aligned fairly straight along the back edge to parallel to the table reciprocation. You would then VERY LIGHTLY grind the top surface flat and parallel. Last step is to grind the back rail of it (which I don't see in the photo) to be square and parallel.

[Mayhem]

Thanks Ken,

The back rail is there but just below the top of the table (like the end rail). I knew that top would need to be 'dusted' but I didn't know about the back rail. I had just assumed that the vise was dialed in like on a mill. Thanks for pointing that out.