Thread: '38 Ford deck lid vs 37 Ford deck lid

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I am in agreement with all of the above . Keep working it and it will come . You are making progress so as we say at work don't set em back .

Your shrinking disc looks great , I wonder if the speed is a issue here ?

I just went a read on speed , they recommend 3000 to 6000 for the 9 inch disc and 10,000 to 13,000 rpm for the 4 1/2 disc . He says something of weight on old grinder so applying good pressure must be a technique also .


Q: What speed of grinder do I need for your shrinking discs?
A: For the 9" discs 3000-6000 rpm work great. I personally use an old heavy 6000 rpm grinder. For the 4 1/2"
discs, most small grinders run at 10,000-13,000 rpm. They will work great.


b

Originally Posted by bluestang67

I am in agreement with all of the above . Keep working it and it will come . You are making progress so as we say at work don't set em back .

Your shrinking disc looks great , I wonder if the speed is a issue here ?

I just went a read on speed , they recommend 3000 to 6000 for the 9 inch disc and 10,000 to 13,000 rpm for the 4 1/2 disc . He says something of weight on old grinder so applying good pressure must be a technique also .


Q: What speed of grinder do I need for your shrinking discs?
A: For the 9" discs 3000-6000 rpm work great. I personally use an old heavy 6000 rpm grinder. For the 4 1/2"
discs, most small grinders run at 10,000-13,000 rpm. They will work great.


b

Thanks, Bobby! My machine runs 5000rpm, which according to your research, may not be fast enough. I also didn't apply very much pressure. I'll try again with more pressure and see what happens with the speed I have.

Let us know how it changes in progress , I may go ahead and make one my self . My electric grinder spins at 11,000 , speed is more surface contact and friction . I am itching to give one of these a whirl .

Originally Posted by bluestang67

Let us know how it changes in progress , I may go ahead and make one my self . My electric grinder spins at 11,000 , speed is more surface contact and friction . I am itching to give one of these a whirl .

I might be able to move the shrinking disc over to my 4"angle grinder which also spins at 11K. I wonder how much racket it's going to make?? The neighbors may not be too happy.....