Comments on: How to Coat Bullets Using a Vibratory Tumbler

By: Nico

Nico — Mon, 03 Jul 2017 05:35:06 +0000

I never knew you can do coating for this. Thanks for sharing.

By: Rewinder

Rewinder — Fri, 31 Mar 2017 05:14:56 +0000

I dump out the media and wipe out the bowl.Put a lb. of bbs and a tablespoon of HBN . Let it vibrate a couple hours Separate the bullets and bbs then slosh back and forth in a towel.

By: MikeC

MikeC — Thu, 30 Mar 2017 23:11:01 +0000

No such thing as DANZAC.
Should stop perpetuating misnomers.

Editor: DanZac was a popular tradename for Tungsten Disulfide ( Ws2 / DanZac ). See: https://www.bulletcoatings.com/

By: synthon

synthon — Sun, 23 Oct 2016 22:52:40 +0000

Watch out for water absorption by the denatured alcohol (ethanol + additives) solvent! Contrary to popular belief, moisture does adversely affect the lubricity of sub-micron dry lubricant particles of Moly (MoS2) and tungsten disulfide (WS2), by causing particle clumping etc.

A more effective solvent would be isopropanol (isopropyl alcohol, ~99% pure), as it is significantly less hygroscopic than denatured alcohol (i.e. ethanol + minor additives) and will thus absorb less atmospheric moisture and at a slower rate. This should allow you to re-use your alcoholic Moly (MoS2) or tungsten disulfide (WS2) slurry longer without sacrificing efficacy due to moisture absorption.

Your moly/WS2 slurry will also absorb significant moisture from the bullets themselves, as metal surfaces hold surprisingly large amounts of water due to surface adsorption from air. Therefore you should heat-dry your bullets before Moly/WS2 coating by first oven-drying at ~120-150 C (250-300 F).

For best results, first clean your bullets with pure (99%+) acetone, then air-dry thoroughly to remove residual solvent liquid and vapors (VERY IMPORTANT, acetone is FLAMMABLE!!). Lastly, heat pre-cleaned bullets in an oven at 120-150 C (250-300 F) for at least 60-90 minutes, making sure to keep the oven door ajar to release liberated moisture. Also, turn on the convection fan if your oven has one, or periodically open oven door and manually fan the air every 20-30 min (to displace humid air with “dry” room air). Let bullets cool in a dry environment if possible (ie. a container filled with desiccant). Alternatively, let bullets cool on the counter to around ~40 C (104 F) or until they’re just cool enough to handle, and begin the dry-coating process in a vibrating bullet tumbler. However, for alcoholic-slurry coating (like “tenring”), allow bullets to cool to room temperature.

-synthon

By: tenring

tenring — Thu, 07 Apr 2016 12:31:19 +0000

I clean my bullets 100 or so at a time with denatured alcohol in a tray, then pour the liquid into a jar for re-use. Drop the bullets on a doubled paper towel, and rub them dry. Then into a plastic Rx bottle filled with a dash of moly and several #8 lead shot.
Tape the bottle lid tight,rotate them in the tumbler for 2 or 3 hrs.,take them out, roll in a clean towel, and they are done.