Zero clearance side seals round 2. (If you don't mind Barry)

Barry Bordes · 08-29-2015, 07:34 AM

Slides,
The Dremel diamond disk blade #545 is made to cut on a 7.344" arc.
The frame is angle iron.

Notice the stop screw for depth and the adjustment for width. On the width adjustment 90º =.008" with a 10-32 screw thread.

The apex seal shown, is stuck in the fixture to rock the corner seal to its full travel.

Use water to extend the life of the cutter. The seal holder is made from one corner of an old rotor and tapped/screwed to the angle.

If you were closer geographically it might be worth sending them to me and I would cut them for you for free.

On second thought it would be better for you to make the tool and provide the service for others over there.

I can send you more pictures if needed.

Barry

Slides · 08-29-2015, 08:00 AM

88Turboii, it is redundant work cutting both sides of the corner seal, you only need to cut the one at the leading edge of the side seal as the rotation of the rotor against the side plate will maintain the gap tight at the trailing end, thus you only need the "labyrinth" at the leading end of the side seal to allow seal expansion without gas bypass.

Thanks for the detailed reply Barry. Perhaps just one photo from 180 degrees of the existing one so I can see how much of the rotor you have used and the way it approaches the seal.

I think I will try to put a jig together, as it happens I already have a diamond bit which looks pretty close (although I would make sure I had several of correct thickness before starting) and dremel style tool although I might not be pulling the motor for a while, I suspect I may have to make a career change to get cash flow happening (I'm hoping I don't have to sell one of the 7s in the mean time). I would certainly make any jig or tool I put together available to other rotary community members here, I have happily volunteered my time to help forums members (rotary and otherwise) with various bits and pieces before. I have learned a bit about air cooled porsche motors in the last few weeks, getting intake and head studs out isn't always fun, and they can run without head gaskets

08-29-2015, 08:00 AM	#2
Slides Rotary Fan in Training Join Date: Apr 2012 Location: NSW, Australia Posts: 39 Rep Power: 0	88Turboii, it is redundant work cutting both sides of the corner seal, you only need to cut the one at the leading edge of the side seal as the rotation of the rotor against the side plate will maintain the gap tight at the trailing end, thus you only need the "labyrinth" at the leading end of the side seal to allow seal expansion without gas bypass. Thanks for the detailed reply Barry. Perhaps just one photo from 180 degrees of the existing one so I can see how much of the rotor you have used and the way it approaches the seal. I think I will try to put a jig together, as it happens I already have a diamond bit which looks pretty close (although I would make sure I had several of correct thickness before starting) and dremel style tool although I might not be pulling the motor for a while, I suspect I may have to make a career change to get cash flow happening (I'm hoping I don't have to sell one of the 7s in the mean time). I would certainly make any jig or tool I put together available to other rotary community members here, I have happily volunteered my time to help forums members (rotary and otherwise) with various bits and pieces before. I have learned a bit about air cooled porsche motors in the last few weeks, getting intake and head studs out isn't always fun, and they can run without head gaskets Last edited by Slides; 08-29-2015 at 08:06 AM.

08-29-2015, 07:34 AM	#1
Barry Bordes Rotary Fanatic Join Date: Feb 2008 Location: Slidell, LA Posts: 191 Rep Power: 18	Slides, The Dremel diamond disk blade #545 is made to cut on a 7.344" arc. The frame is angle iron. Notice the stop screw for depth and the adjustment for width. On the width adjustment 90º =.008" with a 10-32 screw thread. The apex seal shown, is stuck in the fixture to rock the corner seal to its full travel. Use water to extend the life of the cutter. The seal holder is made from one corner of an old rotor and tapped/screwed to the angle. If you were closer geographically it might be worth sending them to me and I would cut them for you for free. On second thought it would be better for you to make the tool and provide the service for others over there. I can send you more pictures if needed. Barry