Well Dogs I continue to tredge on with my projects. I keep telling myself ... It's worth it in the long run, It's worth it in the long run. LOL
Since a pic is worth a 1000 words figured I might as well throw one up of my platen
On to building the buffing attachment. I'm guessing this is going to become a popular home made attachment because it just makes so much sense and is a fairly easy project that can be done without Fancy tools. With this in mind I'll try to explain fully what I'm doing with it and why.
Materials-
2- 3/4" pillow block bearings from Beaumont $21
1- 3/4" driveshaft from Beaumont $25
1- 3/4" bore 4" drive wheel from Beaumont- $ 53
1 1/2" square tube & 5" Channel approx- $20
Tapered spindle
http://www.knifeandgun.com/ProductDetails.asp?ProductCode=TSR $25
$144 + a little for shipping so basically a $150 3HP VSR Buffer. Compare to this variable speed 3HP Baldor Buffer at $1338.59
http://www.mile-x.com/baldor-1252-buffer.aspx
For the record I don't think I NEED 3hp on a buffer but I WANT variable speed. Variable speed will give me the option of running any size buffs I want. Specifically large diameter buffs at the proper surface speed.
The part of this build that will determine the attachments quality is the threading of the shaft. Of course a lathe is the tool for this job but I don't have one and expect most others don't either. I won't be suprised at all if this part of my build is an EPIC failure but I had to try it for general posterity and prove or dis-prove the method for threading the shaft. I do have a back up plan that involves a friend with a lathe threading the shaft properly so in the event of failure all will not be lost
I picked up a 3/4 x 16 die at the local Ace hardware $12 and change. Of course I don't have a die holder for this thing and I gave a shot at using it with some channel locks- unsuccessfully of course. I couldn't get enough pressure to get it started threading and pretty much just chewed up the end of the shaft.
Using this old drill press vice as a die holder actually worked pretty well and once I switched to it I got the shaft threaded with no real problem
At first I put a key in the keyway and clamped the shaft in the vise with leather but that didn't get me enough force to keep the shaft from spinning. Mounting the wheel to the shaft and clamping that up solved the problem
I'm using a 5" wide channel to mount the pillow blocks. A 6" channel would be better and have room for a nut on the underside. As it is with my 5" piece it's going to work but I had to tap the pillow block mounting holes instead of through bolting them on. No big deal but thought I should mention it.
I notched out the ears on the channel so the flat is on top of the tubing. This gives me plenty of meat for threading and lots of area for welding the channel to the tool arm. Ran out of Mig gas so I couldn't weld it up last night but I'll be running to the welders supply shortly to get a refill

Still need to weld everything up and punch the mounting holes through the tubing then tap those two holes and she'll be pretty much done and look something like this. Still need to order the tapered spindle too.
The Ole grinder bench is advancing by leaps and bounds sporting the tree, horizontal grinder, rotary platen, buffing attachment, trued and tuned up flat platen, and still have room in the tree for a dedicate slackbelt tool arm. Also got some nice 3/4" thick aluminum cut-offs for the slack belt attachment

the days of removing my flat platen every other minute are going to soon come to an end... hallaluya
This is about the max opening for the BB file guide. Should clamp on to 3/4" thick guard stock no problem