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View Full Version : VFD Drive, Motor, Bearings, Pulleys for grinder


Edward Skeels
03-21-2015, 01:59 PM
1hp motor, matching vfd with software (1ph 120v input, 3ph output). 11.75 x 1.25 sheave, 2.5 x .75 pulley, (2) 1.25 mounted bearings, (1) 1.75 mounted bearing, 5l belt.
400rpm max with this pulley/sheave combination.
Was for a small grinder. Other plans now.
$250 plus UPS ground shipping.
edskeels at gmail dot com

Bill Worcester
03-21-2015, 04:41 PM
Ed, I am very interested , what model number of the motor, is it a 1750 rpm?

Edward Skeels
03-21-2015, 06:58 PM
See attached pic. Nameplate is 1720rpm. It was advertised as 1800. I think the vfd might make up the difference.

Bill Worcester
03-21-2015, 07:23 PM
The motor appears not to be a 110 volt,is that true?

Edward Skeels
03-21-2015, 08:30 PM
The variable frequency drive is 110-120v single phase input and 230v 3 phase output.

With the vfd set to 60hz output, it drives the 230v 3ph motor at 1720 rpm.

The vfd is capable of up to 200hz max output.

All vfd/motor combinations will have a 3ph motor. Above 1hp, the input will be either 230 single phase or 3 phase input.

Bill Worcester
03-21-2015, 10:40 PM
Electrical head scratching time. This is a great deal for versatile grinder basics.
Nothing better than variable speed grinders, except maybe white bread.
Aloha, Bill

Edward Skeels
03-22-2015, 07:14 AM
The short version is:
Plug it into a wall outlet and turn the knob to adjust speed.

Steve Stadelman
03-23-2015, 12:29 AM
I have built quite a few things with VFD drives and have yet to see one that is 120 v but I have not seen everything.

Steve Stadelman
03-23-2015, 12:32 AM
I stand corrected, I just looked it up. Good to know.

Lawrence Duckworth
03-23-2015, 11:19 AM
Electrical head scratching time. This is a great deal for versatile grinder basics.
Nothing better than variable speed grinders, except maybe white bread.
Aloha, Bill

I'm guessing most of you probably know this but fwiw..3phase machines can be run on single phase service if need be.
Ive used 2 different types of these phase converters in the past, a rotary and the electronic type (electronic is quiet). I don't know if they work with the vfd set-up though..

Years ago I ran a couple 3 phase machines in my basement. A 50 ton Van Dorn plastic injection molding machine and a Bridgeport mill. :)

Edward Skeels
03-23-2015, 12:46 PM
I stand corrected, I just looked it up. Good to know.

Teco JNEV-101-H1