Thread: New 72x2 Grinder WIP in Aus.

Originally Posted by bluesman7

Well, times change. As my grinding skills have improved I don't see myself ever using that lowest speed and I decided that a higher roughing speed would be better, so I have a larger drive wheel coming in today's mail. The small drive wheel will live in the box with my contact wheels so I can just change back if I ever want that slow speed for anything.

New speeds will be approximately 850, 1700, and 3400 SFPM

Out of curiosity: do you think that a VFD would save you time?

Originally Posted by Bruno

Out of curiosity: do you think that a VFD would save you time?

I don't think more than a minute per razor. I do all of my rough grinding at one speed, and all of my post HT grinding at another. It takes less than a minute to move the belt to a different set of pulleys. I would only be changing the drive wheel for something out of the ordinary, and even then it would not take very long.

I've got similar thoughts for my new grinder, but going with the little buddy style of pullout flat platen (with 2" wheels). For hollow (at this stage) I can get an 8" wheel for $30. Not designed for this application but saw someone using it on facebook. Cast metal construction with urathane 'tyre', grease point, and rated to 350kg of load. I do like the idea of the small wheel mount, they are genius for small radii, and using them on a radiusmaster has proved their worth. I've also gone with a 2800 rpm motor and locally sourced VFD (both from WEG).

Looks like a good build so far.

I originally looked at the WEG set ups also but they were over double the price

Originally Posted by Substance

I originally looked at the WEG set ups also but they were over double the price

The motor was comparable to what I paid, but yes, I could have bought 2 & 1/3 of your VFD with what I paid for their bottom range VFD. I ummed and arrred but went with it anyway.

some crucial pieces for the puzzle as I had a long awaited package arrive today from Sunray



Also got a bit more progress done on the body the other day, hopefully will get the motor mount drilled & welded on this arvo also all going well.

Aaaahhh the sacrilege, had to work the weekend along with 12 hour plus days for the last week odd & the rest of this week, be alright if I got paid for any overtime.
either way back on track
unfortunately not much fab completed on the grinder since the last post, but I have got all but 1 of my drill bits & taps found ready,

Bonus was I got home last night & had a parcel from GAMECO on the table to open.



an assortment of 72x2" belts to, some steel marking dye, some forging tongs, & a great deal on some Powdered 1085 metal to experiment with later down the track.
hopefully everything will be back to normal early next week so I should get the time to finish the grinder off .