For those who have already assemble a cyclone...

[Ron from Courtenay, BC]

I have a question regarding mounting the impeller onto the motor shaft. When I first got the Sheldon 14" impeller, the compression hub and the capscrews where all mounted on the bottom (opposite side from the fins). After a couple of checks it seemed that was indeed the correct location for the compression hub and the only thing I did was move the capscrews to the top of the impeller for better access, in my mind this was the only way possible. Was this the way you guys all did it and where you able to pull the compression hub even with the top of the impeller hub? Presently my compression hub is flush with the top of the motor shaft but the impeller is riding almost an 1/8" high and I just cannot tighten the capscrews any further without fear of stripping or breaking something. These capscrews are only threaded into the compression hub 3 or 4 turns, not much. By the way, I did sand off all the paint from the compression and impeller hubs. The compression hub by itself slides onto the motor shaft easily. Any advice would be greatly appreciated. Hopefully my description and terminology are somewhat clear.

Ron

[Ed/Leaside]

Hi Ron,

The compression bushing is an off-the-shelf item which also has other applications. It is designed such that the cap screws can be mounted from either side. To assemble, the screws go in through the unthreaded holes and to disassemble move the screws to the threaded hole (push apart).

The bushing is NOT supposed to bottom-out as per Instruction item #9. "Check Installation Gap - There will be a gap between the bushing flange and the face of the QD product in a properly installed QD system. If there is not a gap between the bushing flange and the QD product, disassemble the parts and determine the reason for faulty assembly." Oh ... you don't have the instructions. http://www.canadianwoodworking.com/forum/images/smilies/wink.gif

Turns out that the folks at Sheldons have been tossing the sheet which comes with the bushing assuming "we all" knew what we were doing. My air foil came with the bush in a sealed, separate box 'cause they shipped it in a rush (Dan was waiting) and that's when I realised what they were doing. Vlad has instructed his people to attach the instructions in the future.

FYI, according to Table 1, the cap screws in a JA bushing should be torqued to 5 ft-lb and DO NOT overtighten.

Ed

[Ron from Courtenay, BC]

Hi Ed, Thanks for taking the time but I'm afraid I don't quite follow everything you said. You are correct that I did not get an instruction sheet with the impeller. I have enclosed a couple of pictures (hopefully) of my present setup. I'm pretty certain I have exceeded 5 ft-lbs of tourque :-) My big concern is that the compression bushing and the impeller are still far enough apart that the cap screws have only barely 3 complete turns into the compression bushing. Is that normal?

Ron



http://www.woodshopphotos.com/albums/album136/IMG_1300.sized.jpg

[Ron from Courtenay, BC]

http://www.woodshopphotos.com/albums/album136/IMG_1295.sized.jpg

[Ron from Courtenay, BC]

Ed, I have been doing some thinking after I posted my last msg. Maybe I have been doing everything wrong? I inserted the compression bushing onto the motor shaft with key in place. I tighten the key cap screw and then place the impeller on top of the compression bushing. I tapped it lightly with a rubber mallet as I did not want to do any harm to the motor. After that I screwed in the 3 cap screws and tighten. Were any of these steps incorrect? Once again, thanks for taking the time.

Ron

[Ed/Leaside]

I don't have an assembled one on hand (they shipped me a 1 1/8" bush in error) but from what I remember of the 3 that I've put together, that looks about right. If the bush is drawn tight on the shaft, you've got it. Picture 2 shows the flange mentioned in the instructions. That gap is supposed to be there. BTW, the spacing between the impeller and the motor plate should be about 1/2", so ...

[Ed/Leaside]

IIRC the keyway and set screw are opposite to the slit in the bushing (the bushing I have on hand has no set screw). If you tighten the set screw first, this will open the slit, preventing the bush from seating properly on the shaft. The set screw should be tightened after the cap screws have bedded the bush on the shaft.

[Ron from Courtenay, BC]

Thanks for all your help Ed. I did adjust the impeller so that it was about 1/2" from motor plate. With the lock washers and Loctite on the cap screws, I sure hope the impeller stays put.

Ron

[Ted Sexton]

When I set my Impeller 1/2" from my LESSON motor my locking allen set screw was PAST my key in the keyway,,So I machined a small flat and drilled and taped for another set screw into the key.Then I istalled my Impeller onto my hub.I also Drilled and taped for 7/16" bolt into the end of the motor.With a large washer and bolt keeping the 3 screws into the hub.It cannot come loose anyway possible

[Ron from Courtenay, BC]

Ted, Yep! I noticed that also about the key. Good idea about the bolt into the motor shaft. Might do the same.

Ron