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MDF Discs for the WS3000

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Project by TheDane posted 843 days ago 4482 views 31 times favorited 41 comments Add to Favorites Watch

StumpyNubs’ Blue Collar Woodworking #7 ( http://lumberjocks.com/StumpyNubs/blog/27256 ) inspired me to try his idea of using MDF discs and buffing compound instead of glass platters and sandpaper on my WS3000.

I found some 1/2’ MDF in the shed, so I screwed a face-plate to a piece of 2X, turned it round, then drilled a 7/8” hole in the center while it was still on the lathe.

I took the blank off the face plate, drilled a 5/8” counter bore on the backside and pounded in a 7/8” hex bolt.

I cut a piece of MDF about 6 1/2” square, knocked off the corners on the bandsaw, and mounted it on the lathe.

Note that the spindle on the WS3000 is actually 12mm. My local big box doesn’t stock metric bolts that big, so I started with the 7/8” bolt, turned the MDF blank to size, then took the MDF disc to the drill press and bored the hole out to 31/64”.

Also, if you turn MDF discs on the lathe, be advised that, if the tools you use were not dull when you started, they will be when you are done … MDF blunts the cutting edges.

—Gerry

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"





41 comments so far

View StumpyNubs's profile

StumpyNubs

5979 posts in 1305 days


#1 posted 843 days ago

I made mine by just cutting them out on the bandsaw and sanding to the line of the disc sander. They don’t have to be perfect because they don’t spin that fast.

To mount them on the Worksharp I drilled 1/2” holes through them, but also had to make a bigger hole half way through for the knob to fit in because they are thicker than the standard discs.

The buffing compound I use came from Sears. Craftsman has it on the website too I think. Harbor freight also sells some pretty cheap.

Of course, all those MDF discs need a stand to hold them in…

-- It's the best woodworking show since the invention of wood... New episodes at: http://www.stumpynubs.com

View b2rtch's profile

b2rtch

4030 posts in 1553 days


#2 posted 843 days ago

Gerry, I know that you are a very nice guy about you make some disks for me I get you the 12mm nuts.
Does any one know what is equivalence between the grit and the color of the different polishing compound that HF sales.
I could not find a thing on HF website.
Thanks

By the way HF is 25% off tomorrow

I was reading a little bit about polishing compound.
Am I correct to say that the color does not indicate a grit but the materiel that the compound is made for?

-- Bert

View TheDane's profile

TheDane

3438 posts in 2168 days


#3 posted 843 days ago

Turning them was probably overkill … but I’ll go for just about anything that involves using the lathe!

The bolt in the knob on my WS3000 is long enough that I can get a couple of turns, so I can use both sides of the disc.

—Gerry

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View StumpyNubs's profile

StumpyNubs

5979 posts in 1305 days


#4 posted 843 days ago

b2rtch- I have tried for over a year to figure out the “grit” ratings on these compounds. The only thing you can do is just try them and see what happens. Actually, I sometimes wonder if the white is finer than the red or vise-versa!

I think if you just buy the HF ones and do some trial and error they should work out just fine!

-- It's the best woodworking show since the invention of wood... New episodes at: http://www.stumpynubs.com

View b2rtch's profile

b2rtch

4030 posts in 1553 days


#5 posted 843 days ago

I f any one is interested, trying to answer my own questions I found these pages:

http://en.wikipedia.org/wiki/Polishing_%28metalworking%29
http://www.caswellplating.com/buffs/buffing.htm

Gerry, I did not mean to hijack your post, sorry.

-- Bert

View DavidBethune's profile

DavidBethune

601 posts in 1898 days


#6 posted 843 days ago

I have owned my worksharp for a few years now and love it.. I’ve seen lot’s of ideas posted before about disks.. so you can take what I’m saying here to the bank…. Been there done that..

MDF will not stand up… plus it has many other shortcomings..

Use acrylic… It’s both stronger, thinner (no problem with the knob holding it), “Dead Flat” and you can’t hurt it..
The WHOLE reason they used GLASS was because of the “dead” flatness of the surface..
It is “VERY” important to be “dead flat.”

Also with acrylic you can use a spray adhesive for your sanding disks, allowing you to use non P&S paper which is cheaper.

We had this conversation long ago…..

I cut the acrylics on my laser to make both of the disks.. Look at this POST
Although I use CLEAR on my slotted disks you STILL have to slot the disks.. it’s pretty obvious why.. so I won’t go into it..

From a previous discussion on this topic also:
As far as GRITS…. all that are really necessay are 3… They are sold at LEE Valley.. GRITS NEEDED
The SCARY SHARP people recommend using 15 micron (approx 600 grit) – 5 Micron (approx 1200 grit) And then use the Chrome Oxide $2.20 sheet for a mirror finish.. You can read about what I found here..
MICRO-FINISHING

So what I’m saying is your Stumpy’s idea sounds good Gerry but it’s been tried already and discussed on LJ’s and other sites before… Use ACRYLIC… end of story…....

Check out my new Woody Wood Wacker Video Gerry if ya get a chance..>>>> Woody The Wood Wacker

View b2rtch's profile

b2rtch

4030 posts in 1553 days


#7 posted 843 days ago

David,
Ok but whee do you buy acrylic and which kind to buy and if (very unfortunately) you do not have a laser machine, how do you machine it?

-- Bert

View DavidBethune's profile

DavidBethune

601 posts in 1898 days


#8 posted 843 days ago

@ Bert.. Any lumber store sells acrylic sheets..just ask.. used for window replacement..Home Depot etc.. Acrylics cut the same as wood.. so any saw will cut it.. You can also turn it for round on your lathe with Excellent results..
Cut it out rough on you bandsaw and chuck it onto you lathe.. “Make sure you mark center” after you true it up for round (don’t touch the surface of the disks, just the edge) so that you can take it to your drill press and use the right sized whole cutter for you center hole..
It comes in various thicknesses.. I used 3/8” you could use 1/4” and stick them together if you wanted..

View a1Jim's profile

a1Jim

109523 posts in 2082 days


#9 posted 843 days ago

I have about 10 glass disc for my work sharp so it’s to late for me to try a different kind of disc, but I think Stumpy’s and David’s ideas are pretty darn creative. That looks like a pretty cool stand for your work sharp Stumpy. Your disc making turned out very well Gerry.

-- http://artisticwoodstudio.com Custom furniture

View b2rtch's profile

b2rtch

4030 posts in 1553 days


#10 posted 843 days ago

Thank you David and Happy New Year to you

-- Bert

View DavidBethune's profile

DavidBethune

601 posts in 1898 days


#11 posted 843 days ago

Yes Jim.. I’m not knocking Stumpy.. it’s just that it’s already been tried is all.. He did make a nice stand.. for his.. Mine stand is a little different but it’s nice to have everything all together..
You did a GREAT job Gerry.. if you need more disks though give what I’m saying a try is all..

View foneman's profile

foneman

111 posts in 2599 days


#12 posted 843 days ago

David,
Are you saying that green, white, and red buffing compound will stick to the face of the acrylic disks like it does to the MDF disks?

Gerry,
Your disks look good and the information is appreciated.

john

View DavidBethune's profile

DavidBethune

601 posts in 1898 days


#13 posted 843 days ago

Hi John…
Just adhere a thin buffing pad to the disk and use whatever grit you want..

Look at this link and see how they did it.. BUFFING COMPOUNDS

You do not need all of the grits they talk about with their system..
Use the ones I posted above.. and you won’t be dissapointed..
David

View LittlePaw's profile

LittlePaw

1565 posts in 1583 days


#14 posted 843 days ago

I’v been eyeing and considering the WS3000 and comparing it with other edge sharpening systems. You guys made up my mind for me. THANX ! ! ! GREAT INFO TOO, GUYS.

-- LittlePAW - The sweetest sound in my shop, next to Mozart, is what a hand plane makes slicing a ribbon.

View Jim's profile

Jim

217 posts in 2150 days


#15 posted 843 days ago

If this works it sounds great but does the MDF disk stand up to use? I would have thought that it would wear away pretty quick resulting in a non-flat surface. Can anyone who has used these MDF disks comment on this?

-- Jim in Langley BC Canada --- www.sollows.ca

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