Ain't nothing like 12-incher

[rashid11]

varispeed exposed sanding disk to flatten stuff out

Changing PSA disk takes seconds, it flattens giant size
areas to absolute flat etc etc etc.

But not many of us can justify the expense or find the
space required to host such a monster.

So ... how about making it as an attachment to yer KMG/Bader
grinder ? $60 in parts and u got yerself an attachment that
clamps right onto the arm of the grinder. Seconds to put on or
to remove

http://img174.imageshack.us/img174/212/dsc0001wn4.jpg

Parts:

- 2 pillow block bearings, 3/4" ID in my case
- some HRS to make a plate (~5x5") to put these onto
- a 3/4 shaft, reduced @ working end to accept whatever hole
your disk has
- $5 die-cast V pulley from yer favorite supplier. I turned it down to where
the V turned into a flat
- 3-rib belt in proper length, used inside-out
- 12" disk I bought @ Grizz - it is a spare part for one of their grinders.
9" is a more popular size, as sanding paper is so cheap. But, you can easily
switch between disks of different size, so you can have your cake and eat it, too

 

[fludunlimited]

thats cool
I use a flat marble slab and sand paper to flaten
the inside of the handle and blade before grinding. can you use a sanding disk like that to speed up the process?

 

[richard j]

you can do a lot of things with a 12" disc. i grind my blades with a 12" along with flattening anything else out. i made my 12" disc along with a 6" disc. i found a cheap place to get psa paper discs too.

 

[rashid11]

richard - where do you get your psa discs from ?

I get mine from McMaster - they go for $15 for 5 disc pack, in 12" size.
AlO - 36 to 400 grit, SiC up to 180.

 

[David Wesner]

Back that camera up a bit rashid We need a few more pics :thumbup: I like it :thumbup: :thumbup:

 

[rashid11]

it is all here:


http://www.bladeforums.com/forums/showthread.php?t=430518

 

[richard j]

rashid11, i done a lot of searching and after quite a few days, i came across this site. http://www.hartmannvariety.com/cat_sandpaper.cfm paper psa discs really cheap, 35 cents each for 60 grit wet or dry. i'm thinking of making a mist cooler and trying some wet grinding. :thumbup:

 

[rashid11]

Rich - that is an excellent find ! I dunno how they can sell it this cheap - about 5 times less expensive compared to McMaster et al, plus you don't have to buy in packs of 5 or 10 !

Thank you for sharing the link with fellow frugal hobby KMs .

 

[richard j]

rashid11, drop me a line.

 

[fludunlimited]

has anyone used a swamp cooler motor for this?

it would have 2 speeds with the stock switch and you might use a dimer switch on it.

I have an old cooler siting out side I think I will try it.

 

[rashid11]

Anything should work that has nuff torque and is protected, one way or another, from swarf and grit .

My 12" clamp-on disk is variable speed and that comes in handy quite often.