[email protected] wrote: > Hi from Joe: > > Have in my hand the $1 Radio Shack motor. It has > a .225" long shaft with .077" diameter. Have considered > hiring a machine shop to build a shaft extension from a > 1/4" S.S. bolt - drill to size & tap a setscrew hole, > shaft hole must be concentric. Do any of you know of > a source for an extension of maybe 2" with or without an > impeller? >
You shouldn't need a machine shop to do that, just a drill press and a tap. > > Have ordered a transformer w 5.0 V secondary. Label > says it likes .9 amps at full load which should make > 8300 RPM. What's cheap & works ok for a speed control? The motor is most likely a DC motor, and will not run on a transformer without a rectifier. If it is a DC motor then you would do better to get a wall wart with a DC output. The cheapest way to make a speed control, if the motor is a DC motor, is to mount a dimmer switch in a box, and use that to power the wall wart. If it is an AC motor then there is no effective way to vary the speed, as that requires varying the frequency and voltage applied to it simultaneously. Marshall -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
