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They appear to be 5/16" roll pins. An undersized hole may be necessary. Drill very cautiously(start small and increase bit size gradually. These are blind bores, so do not insert pins all the way until you are SURE everything is A-OK!

Methinks you are up to the challenge.

I think there are a couple of potential problems trying to convert the 500 lower saw guard to a 510 lower saw guard. If you look carefully at Dusty's picture of the 510 guard, the raised area around the bolt is there to make it possible to align the upper guard riving knife with the saw blade. The holes for the roll pins are also deeper. At the very least, you will need to devise a spacer to move the riving knife in line with the saw blade, and there may not be enough thickness in the lower saw guard to securely hold the roll pins, either. Not impossible, but it is going to take more than just grinding off that flange and drilling a couple of holes.

Ron

I think you just might be absolutely correct, Ron. I looked at this with blind eyes. I knew what I thought needed to be done but I overlooked a critical issue.

The two roll pins are embedded a full 3/8" into the casting. The casting that we are talking about modifying is not that thick. But, two appropriately sized collars could be JBWelded to the outside of that angle piece to deepen the holes.

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RonKlein wrote:I think there are a couple of potential problems trying to convert the 500 lower saw guard to a 510 lower saw guard. If you look carefully at Dusty's picture of the 510 guard, the raised area around the bolt is there to make it possible to align the upper guard riving knife with the saw blade. The holes for the roll pins are also deeper. At the very least, you will need to devise a spacer to move the riving knife in line with the saw blade, and there may not be enough thickness in the lower saw guard to securely hold the roll pins, either. Not impossible, but it is going to take more than just grinding off that flange and drilling a couple of holes.

Ron

He does not have a 500 lower guard. He has a 500 sanding disk dust collection chute. It IS a subset of a 510/520 lower saw guard.

Thanks Ron,
I see now. I have the roll pins installed and they seem solid, but I will need a spacer to get it to line up properly. Can someone measure the thickness of the 510 lower guard? It seems the sanding chute is thinned down significantly.
I'll use what I have and shop for a lower guard.
Scott

RonKlein wrote:I think there are a couple of potential problems trying to convert the 500 lower saw guard to a 510 lower saw guard. If you look carefully at Dusty's picture of the 510 guard, the raised area around the bolt is there to make it possible to align the upper guard riving knife with the saw blade. The holes for the roll pins are also deeper. At the very least, you will need to devise a spacer to move the riving knife in line with the saw blade, and there may not be enough thickness in the lower saw guard to securely hold the roll pins, either. Not impossible, but it is going to take more than just grinding off that flange and drilling a couple of holes.

Ron

vzandt wrote:Thanks Ron,
I see now. I have the roll pins installed and they seem solid, but I will need a spacer to get it to line up properly. Can someone measure the thickness of the 510 lower guard? It seems the sanding chute is thinned down significantly.
I'll use what I have and shop for a lower guard.
Scott

About .600" boss inner surface to opposite side!

Hi,

Some where in the past we had a discussion on this and I missed the fact that the 500 dust collector had parts removed or if you rather "milled off".

In this image you see the 5++ blade guard/dust collector on the left and the 500 dust collector on the right. I guess this make since when thinking about the shorter arbors on the disk sanders....
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When you look inside the 500 dust collector you can see what else had to be removed. It is very clear as this operation happens after the paint has been applied.
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If one were wanting to use the dust collect you would need to construct a block to replace the milled off one, the height of which would be established with the outside rim that is still intact. I would think a piece of rock hard maple would work. An aluminum piece would be even better. Once it is sized and tested it could be epoxied in place. It doesn't look to be that bad a job making such a piece, just make sure the holes are located in the correct position and the thickness matches.

Any one locate that old post? It would be nice to reference the two together.

Ed

Thanks again Ed! You have cleared it up!

Although the dust chute is a subset of the 5x0 lower guard, it is a modified part!

I found the other thread and updated my posting with a reference to this thread. Good thing we are able to revisit things and learn more about the subject matter at hand. I'm also glad I do these things for free, so remember you get what you pay for...

Other post is at:
https://forum.shopsmith.com/viewtopic.php?t=4566

Ed