Model Engine Maker

Supporting => Tooling & Machines => Topic started by: Brian Rupnow on May 16, 2018, 06:07:28 PM

Title: HYBRID ARBOR-PULLEY
Post by: Brian Rupnow on May 16, 2018, 06:07:28 PM
I have a 1/2 horsepower 1750 rpm motor on my main workbench out in the garage that is primarily used to "run in" small engines to loosen them up. I want an arbor to mount my different polishing buffs on. I don't like polishing in my lathe because it makes such a mess. I don't want to be constantly changing the pulley for a shaft mounted arbor because it gnarls up the motor shaft. LIGHTBUULB!!!--Make a threaded arbor that has the pulley permanently mounted to it.
(https://imageshack.com/a/img921/2754/vMzgYL.jpg)
Title: Re: HYBRID ARBOR-PULLEY
Post by: crueby on May 16, 2018, 07:41:30 PM
Looks good. For my polish wheel fitted an arbor on an old furnace motor bolted to a board.
Title: Re: HYBRID ARBOR-PULLEY
Post by: Brian Rupnow on May 16, 2018, 09:38:44 PM
Prior to building this thing I ran my buffs in the lathe at about 500 rpm. This should be a big improvement at 1750 rpm. I won't have buffs on there when I'm using the v-pulley to break in an engine. Conversely, I won't have the v-belt on there when I am buffing something. Think about it--For the last 8 years I've been spinning those buffs about 2" from the spinning jaws on the lathe chuck, with a half inch bolt and nut making my arbor. This was a nice little project, based 40% on need and 60% to give me something to do this afternoon.
(https://imageshack.com/a/img921/2497/BxMJMJ.jpg)
(https://imageshack.com/a/img923/8605/HzTN8Y.jpg)
(https://imageshack.com/a/img924/1461/NHxsnm.jpg)
Title: Re: HYBRID ARBOR-PULLEY
Post by: crueby on May 16, 2018, 10:31:58 PM
Should be a lot safer this way, without the chuck jaws nearby to bust a knuckle. Nice!
Title: Re: HYBRID ARBOR-PULLEY
Post by: Brian Rupnow on May 19, 2018, 02:51:34 PM
Not out of any undue considerations of my fingers, but in order to get the correct ratio I machined a smaller v-pulley from aluminum and mounted it on my arbour. The original pulley which I showed on the arbour was 3.5" diameter. The new one is 2 1/2" diameter, which restores the ratio I wanted and does get the pulley a little farther away from my fingers if I want to polish something on the buff.
(https://imageshack.com/a/img921/9980/ekXUWo.jpg)