Shopsmith Forums

Reverting back to the conical disc(s). FWIW the SS conical discs I have are all slightly under 3° (2.7°) rather than the published angle.

On my M VII discs I have the same grit on each disc. Different discs for different grits(4). Their angle is about 1.2°.

Not sure how the tapered holding plate makes much difference? Holes that tight????

"Not sure how the tapered holding plate makes much difference? Holes that tight????"

What do you mean by "tapered holding plate"? And the rest of it?

It was mentioned that the plate under the wingnuts was tapered to match the blade taper. Since the taper is so slight, I question the need.

Or maybe I simply mis heard/understood what was said. ???

I have not had one of these in my own hands. (I made one out of a hunk of oak firewood.)

Interesting thing happening...I didn't recall that tapered plate and wing nut so went to rewatch the video in case mentioned there. Used the link a couple pages back to start the video and it wants me to pay to join the channel to see it. Switching over to YouTube I found the video and can play it for free.

In fact I was thinking of paying some dues for this channel because I find it so interesting and useful, maybe I'll just go ahead and do that. It is rare that a cheapskate like me would do something like that even with it being a trivial sum.

edma194 wrote: ↑Wed Dec 01, 2021 4:51 pm Interesting thing happening...I didn't recall that tapered plate and wing nut so went to rewatch the video in case mentioned there. Used the link a couple pages back to start the video and it wants me to pay to join the channel to see it. Switching over to YouTube I found the video and can play it for free.

In fact I was thinking of paying some dues for this channel because I find it so interesting and useful, maybe I'll just go ahead and do that. It is rare that a cheapskate like me would do something like that even with it being a trivial sum.

Scott mentions this on most of his videos. The weekend videos are always available for free. The mid-week videos he calls Stumped Q & A are free for one week. Then they go private for channel members only.

Hey JPG. The point I think I was trying to make is that the angle that the base of the jig holds the knives is designed to produce a 45 degree angled bevel. Because the disc is beveled and the back face of the tapered knives are not paratonnerre the face of the knives, the angles were calculated by Shopsmith to allow the jig to be used without tilting the table, as we do when sanding the edge of wood. This was done so the jig could be used on the Power Station. The question that I’ll admit to being a little coy about is if the jig can be used on non-Shopsmith jointer or planer knives. I’ve answered that question by saying that I suspect Shopsmith would say that it isn’t designed to be used with non-Shopsmith knives, but let’s face it, it would work. The guy who asked the question mentioned that he used it on DeWalt planer knives, and I took that opportunity to mention that most portable planer knives aren’t ment to be sharpened because they don’t have height adjustment. Anyway, the fact that I could see myself sharpening my Delta jointer knives on it shouldn’t be an endorsement of the activity. Am I making any sense? I think I’m sleep deprived! Scott

Ya yo making sense! Re the grind angle, adjusting the table angle will allow differing grind angles for different species. I must have misconstrued what you said. When I made my oak jig, I cut the slot at 45° which will create a slightly more aggressive grind angle with the 2.7° disc angle.(47.7°)

Power Station? Aux table/rip fence/conical disc. Good way to get a slow grind speed? Trying to get my mind wrapped around that setup! All that vibration!!!

Sleep deprived @ 16:00 ? ? ?

My Growth Rings with Scott Markwood

Watch it here: https://youtu.be/51jRiMJXi-A

Continuing our conversation with Shopsmith power tool company engineer, Jim McCann, we move on to improving on old tool designs and the importance of a "weak link" in a powertrain. Jim has been a friend and woodworking mentor since the 1980's and has been working at and for Shopsmith for 42 years!

If you enjoyed this, here are a few videos you might also enjoy"
Here's Part One of my chat with Jim: https://youtu.be/mXMhBdZtaQo
Here's Jim's shop tour with Nick Engler: https://youtu.be/O8-fU850MZg

"Mechanical fuses"

My Growth Rings with Scott Markwood

Watch it here: https://youtu.be/7GuQMjgt3rk

We wrap up our conversation with Shopsmith power tool company engineer, Jim McCann, and we start off with a comment that I heard from several people who saw the tour of Jim's shop on the Workshop Companion channel. From there we talk about tools that Jim wishes could have made it to market and a few final thoughts. Thanks for joining us in this conversation.

If you enjoyed this, here are a few videos you might also enjoy
Here's Part One of my chat with Jim: https://youtu.be/mXMhBdZtaQo
Here's Part Two of my chat with Jim: https://youtu.be/51jRiMJXi-A
Here's Jim's shop tour with Nick Engler: https://youtu.be/O8-fU850MZg