Need Bench Grinder Nut Help

[pkinneb]

I have a Delta GR450 8" bench grinder with tool less retainer nuts and I want to switch to a regular nut but have been unable to find anything locally or even online that will work.

Using the model number etc I purchased these from ereplacemnets and after 6 weeks and $18 they don't fit.

The reason I need to change is the tool less version does not work with my wheel balancers.

Any ideas out there?

Thanks in advance for your help!

[Mark J]

I would have thought that a hardware  store item.  Is the shaft an unusual thread?  By the way, are the threads left hand?  

[Von]

+1 to Mark's question. I'm in the habit now when I'm in a similar situation, my first step is to size (e.g.) whatever it is I'm trying to replace to figure out if metric/standard, some unusual threading, etc. That often gives me a clue what I'm in for.

[wtnhighlander]

Try a 5/8" arbor nut from an angle grinder, maybe? My guess is that one of the shafts is lefty, though. You want the inertia of the wheel to always tighten the nut, so the opposing ends of the shat probably thread opposite directions.

[Tom King]

Should be LH on one end and RH on the other.  5/8 lawnmower blade nuts should fit it.  They come both ways and have a built in "washer" on one side.

One example of many:

https://www.amazon.com/CUB-CADET-712-05134-Flange-Ultima/dp/B0198RQ70M/ref=sr_1_8?crid=1IQQ66SURLHPB&dib=eyJ2IjoiMSJ9.3vbW7ImJ1R4U4pIajklqQ1_Hf6rQfPgoXJ62nyKihhQuM6k2Au3FE3HdRsgWucyOMSKnc5l1lcghmLr9j7FnC3BBy6_XDPsbf8--W_tnYyHKf9cmAHzyGqgcPktWjoaymSzmTxA97GpYHjg-EyvZeh29w-hk9-K6WRDOopw6cavyTdE6HicXNaQDS7PDJDsDCfbSDyU-i0srlGs_M3vUj21IWeqhpopcKzG1mI08rlM.PSqgoh5OB3lBFurLFMPlV8yeQve36eLpxQX2Urseclg&dib_tag=se&keywords=5%2F8+lawnmower+blade+nut&qid=1713660155&sprefix=5%2F8+lawnmower+blade+nut%2Caps%2C106&sr=8-8

[William R]

Go to fasteners if you have on in your area. Take the nut with you. If they don’t have one they’ll be able to tell you where to get one. Or a hardware tool repair place

[pkinneb]

Thanks all I will give these idea's a try! Appreciate all the suggestions