Assistance getting direct drive setup on my KMG

Hawk45

Hawk45

Joined
Jan 28, 2005
Messages
2,154
Need assistance getting my 3HP 3PH 1740 RPM 56HC motor (5/8" drive shaft) with VFD setup for direct drive to my KMG (3/4" drive shaft)

An engineer buddy of mine recommended to use a bellows/coupling between the two drive shafts since they cut down on vibration and allow me to attach my 5/8" motor shaft to my 3/4" grinder shaft. One thing I've also read is that getting them aligned properly is key to reduce wear.

Something like this.
https://www.nbk1560.com/en-US/products/coupling/couplicon/

I've read Matthews thread on his direct drive conversion plate and have contacted him, but waiting to hear back. I don't have access to machining equipment so my fabrication options are limited.

I really don't want to go with pulley's and belts, but if I have to I will.

Anyway, any assistance is appreciated.
 
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Even better would just be attaching your drive wheel directly to the motor shaft. You could get a 5/8" drive wheel, or maybe a shaft bushing/adapter from 5/8 to 3/4.

Fellow forum member Matthew Gregory has a line on a direct drive adapter plate that's a really nice and elegant solution for mounting a 56c face mounted motor.
http://www.bladeforums.com/forums/s...a-KMG-to-direct-drive?p=15709471#post15709471

If you don't have a 56c frame, then I'd just knock the bearing plates off and mount the motor accordingly.

A lovejoy, bellows, spline, or any other style of in line coupling will certainly work as well, assuming it's properly aligned and installed.
 
I run mine with a love joy and could not be happier. Much better then the pully system I had in the past.
 
Ask Matthew Gregory about the custom made drive wheel that goes along the with the adaptor plate for direct drive. It will make alignment of wheels and your belt much easier. , Larry
 
You could try the simple approach - mount motor to grinder base to position shaft mounted drive wheel so it will be in line with for belts. You can adjust the motor position with the slots in the motor base plate.

Ken H>
 
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