Increase the size of your polishing wheels from the standard 4" wheel

to a 6" wheel. This will cut polishing time by over 1/3. Changing

to a 6" wheel from an old wheel worn down to 2 BD" or 3" will cut

polishing time too less than 1/2. This is due to the surface area of

the wheels. Although spinning at the same speed, more surface area

moves over the jewelry in the same amount of time there by polishing

faster. Brad Simon CMBJ

# [Favorite tips] Decreasing Polishing Time

**Brad_Simon1**#1

motor RPM is the same. the outer surface velocity of a 6" wheel is

much higher than a 4" wheel. I’m not exactly sure what the rate

increase is. the calc has something to do w/radius, pi, and RPM. if

working in silver be carefull as this can increase the risk of drag

lines on your work. this is because of great increase of friction

where the metal meets the wheel. that’s how I see it anyhow.

JH

Absolutely Correct, John Humphries! For those with a mathematical

bent: The circumference of a 4" wheel = 4 x �(pi) inches. And the

surface speed = 4 x � x RPM inches/minute. Similarly, the surface speed

of the 6" wheel = 6 x � x RPM inches/minute. For a motor turning at

1725 RPM (a common speed), the surface speed of the the two wheels is:

4" Wheel = 21,677 inches/minute (20.5 miles/hour). 6" Wheel = 32,515

inches/minute (30.8 miles/hour). So at any RPM, the 6" wheel will have

a surface speed 6/4 or 1.5X that of the 4" wheel. Probably more than

you wanted to know, but it may come in handy some day. Just put it in

your book of handy, dandy conversion factors…Bob Williams

**John_Sholl**#4

While I advise keeping buffs, split laps and brushes of many shapes

and sizes handy, I could not agree more that a larger buff is much

more efficient. If my calculations are correct the surface area of a

six inch buff will speed by you at sixty one mph . A worn out two

inch buff only has a surface speed of twenty mph. To put this into

more practical terms consider if someone had never driven a vehicle

that went over twenty mph and then they were given a car, they may at

first be intimidated by the power but would soon become comfortable

with the highway speeds. Also, in addition to using a larger buff try

using a 3/4 horse power motor (available from Baldor and Redwing)

they do not bog down under the pressure put on the wheel while

polishing a heavy or platinum piece. Just remember that if it

polishes that much faster it can also wreck things in a hurry.

John Sholl

Littleton, Co

Just a caution to all the newbies out there, I seem to remember

reading (from “Cheap Thrills in the Toolshop”? or something posted on

Orchid) that it is a very bad idea to use a wheel or buff with a

larger diameter than one recommended for your machine. My 3450 rpm

polisher came with a 4" buff and that is the largest I will use.

Gail Middleton

`Just remember that if it polishes that much faster it can also wreck things in a hurry.`

Amen! For just this reason, I’ve gone to mini-buffs (with an adapter

on the spindle), especially for rouge. I’ll happily sacrifice speed

for greater control and security.

Beth