Does anyone make buffing wheels for a 7mm pen mandrel?

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BHuij

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Apr 23, 2025
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I assume that reading a dizzying number of opinions and contradictory "facts" about the "best" way to get an ultra-glossy shine on a CA finished pen is some kind of rite of passage.

Now that I've run that particular gauntlet, I think I'm at the stage where I'm ready to do a bit of experimentation for myself and just come to my own conclusions. Then I can come yell about them on forums as if they are gospel truth, and all other approaches are inferior, right?

Cynicism aside, I've been fairly happy with the following process for my pens for many years:

1. Sand wood or acrylic to ~600 or ~800 grit (dry).
2. Apply CA glue to wood (obviously not needed for acrylic pens)
3. Level CA glue if necessary with ~400 or ~600 grit (wet).
4. Wet sand with micro-mesh from 1500 through 12000.
5. Clean barrel thoroughly, apply plastic polishing compound at low-to-medium speed.
6. Do a final quick hit with Renaissance Wax, really just as a way to help mitigate fingerprints.

I've always used Hut Ultra-Gloss Plastic Polish for step 5, but it seems hard to find these days, for some reason. I may try PSI One-Step as a direct substitute. I've read Meguiar PlastX, 105, and 205 are also excellent, but I can't seem to find them in reasonable quantities for reasonable prices anywhere.

But I have always kind of wondered about buffing. It has the advantage of being done longitudinally, so it would really help remove any leftover radial scratches. I could see a final buff with something like an ultra-fine plastic-glo type compound being a slight improvement in the final finish, after applying the plastic polishing compound on the lathe, but prior to the wax.

My question is - why hasn't anyone made a buffing wheel that fits a normal 7mm pen mandrel? Everyone seems to want to sell me a brand new mandrel specifically sized for their 3-wheel kit, and they want like $80 for this. Prices seem kind crazy for what I'm getting. Does anyone have a buffing wheel they like that fits a 7mm mandrel?
 
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You know what. I feel a little silly for even posting this. I have a 3D printer and have already printed stuff for my lathe. There is absolutely nothing at all stopping me from printing spacers and adapters to use standard size buffing wheels intended for a larger arbor on my 7mm mandrel.

Anyone got a buffing wheel they really like for CA finish on pens? Cotton? Flannel? I'm super new to buffing, never even tried it.
 
@BHuij I use pretty much the same system as you, but recently have added a different polishing compound to the mix instead of the Mequire's or Plast-X. A vendor at the 2024 MAWTS event in Lancaster PA was selling a car buffing polish that really does the job better than my previous polish and buff solution especially on resin blanks. Ruppe's is an automotive polish made and using the three different polish grades, they make I have even cut way back on my buffing wheel use. https://www.amazon.com/RUPES-Coarse...0e0-a4b4-220ed5d0bb34&pd_rd_i=B08HW1HVY6&th=1
 
I took a 14" length of threaded rod, turned a morse taper end from purpleheart and glued it on one end, drilled a 60 degree hole on the other end. Got 4 flannel buffs from Caswell and used locktite to secure the wheels with nuts and washers. Everything but the wheels cost less than $8. When not in use it fits in a shopping bag at the bottom of my tool cart.
 
@BHuij I use pretty much the same system as you, but recently have added a different polishing compound to the mix instead of the Mequire's or Plast-X. A vendor at the 2024 MAWTS event in Lancaster PA was selling a car buffing polish that really does the job better than my previous polish and buff solution especially on resin blanks. Ruppe's is an automotive polish made and using the three different polish grades, they make I have even cut way back on my buffing wheel use. https://www.amazon.com/RUPES-Coarse...0e0-a4b4-220ed5d0bb34&pd_rd_i=B08HW1HVY6&th=1
Do you just use the Ruppe's Coarse instead of Plast-X? Or can you provide a link to the finer ones as well?
 
I took a 14" length of threaded rod, turned a morse taper end from purpleheart and glued it on one end, drilled a 60 degree hole on the other end. Got 4 flannel buffs from Caswell and used locktite to secure the wheels with nuts and washers. Everything but the wheels cost less than $8. When not in use it fits in a shopping bag at the bottom of my tool cart.
did the same. in fact, the library has my instructions. holds 4 buffing wheels
 
did the same. in fact, the library has my instructions. holds 4 buffing wheels
I used Tony's instructions and love my setup.

Rick Herrel (@rherrell) made me an MT2 with 1/2"-13 threads for one end and the other a 1/2"-13 with a 60 degree indent for my live center.

B7446B81-1BF3-4BDD-A2E8-72446A7851B4_1_105_c.jpeg
 
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