Belt grinder drive wheel size ?

I

Ignas

Joined
Aug 24, 2017
Messages
2
Hello folks.

Building a 2x72 belt grinder at the moment, following some simple diagrams, nothing too difficult.
Until i hit the whole SFPM/speed thing. I'm looking to get about 3000-3500 SFPM.
Will be using 1.1kW 230V single phase motor in direct drive. My contactless tach shows it going at 3000rpm, motor plated as 2800.

So, my question is what diameter drive wheel i should be making ?
 
The formula for surface feet per minute is:

(Motor rpm x speed multiplier (if any) x drive wheel diameter x 3.14) divided by 12

'Speed multiplier' would be a pulley ratio, should you use one, btw.


I would urge you to examine what abrasives work best with the alloys you plan on using. Everyone has their own way of doing things, but consider asking the abrasive manufacturers what THEY suggest. They make the stuff, after all! For example, I use Norton Blaze belts a lot because they cut the alloys I use most effectively, but they demand a higher speed than your target above states, so they probably won't work well for you. Good luck!
 
Well, its not like i will be able to change speeds of the motor anyway :D
Plus, i'm only starting so training wheels are still present - will take whatever i can get for free :D Dont have any shafting, step pulleys, etc. Direct drive for now.
 
Ignas said:
Hello folks.

Building a 2x72 belt grinder at the moment, following some simple diagrams, nothing too difficult.
Until i hit the whole SFPM/speed thing. I'm looking to get about 3000-3500 SFPM.
Will be using 1.1kW 230V single phase motor in direct drive. My contactless tach shows it going at 3000rpm, motor plated as 2800.

So, my question is what diameter drive wheel i should be making ?
Click to expand...

Why only 3000-3500 SFPM ? I just build belt grinder and it run 6400SFPM and I like it ! With jig is so easy to grind blade on that speed , in minute :)
Here you can practice which drive wheel you want . . . https://www.blocklayer.com/Pulley-Belt.aspx
 
You must log in or register to reply here.
Back
Top