Search found 834 matches

by liveaboard
Tue Oct 22, 2019 6:13 pm
Forum: General Discussion
Topic: VFD setup
Replies: 1
Views: 37

VFD setup

I recently bought a Lenze VFD from ebay. 3-phase 380 to 3-phase 380, 1500W, $30! In the instructions, it states; In Volts per Hz mode the drive linearly increases output voltage as a direct function of the drive’s output frequency by the slope of the line defined by P165 (base voltage) and P167 (bas...
by liveaboard
Tue Oct 22, 2019 12:58 pm
Forum: General Discussion
Topic: Electrical wiring in the home shop.
Replies: 52
Views: 1332

Re: Electrical wiring in the home shop.

I've had whole house GFI breakers in my breaker boxes for 30 years; I think 1 failed during that time.
by liveaboard
Mon Oct 21, 2019 12:44 pm
Forum: General Discussion
Topic: Rotary shaft seal with concentric tolerance?
Replies: 17
Views: 468

Re: Rotary shaft seal with concentric tolerance?

But;
The first scan is page 59 and the second is page 62
by liveaboard
Mon Oct 21, 2019 8:03 am
Forum: General Discussion
Topic: Rotary shaft seal with concentric tolerance?
Replies: 17
Views: 468

Re: Rotary shaft seal with concentric tolerance?

Thanks for posting that; The pdf of the patterns came ok, the second one with the text is missing the left half. The picture of the seals I ordered do look similar to the crwa1 in your diagram, so there's reason for optimism. That will make life easy; all I have to do is cut a recess into each end o...
by liveaboard
Mon Oct 21, 2019 5:57 am
Forum: General Discussion
Topic: Electrical wiring in the home shop.
Replies: 52
Views: 1332

Re: Electrical wiring in the home shop.

AFCI Arc Fault Circuit Interrupter breakers

Never heard of those; it's always fun to learn something.
by liveaboard
Mon Oct 21, 2019 5:50 am
Forum: General Discussion
Topic: Rotary shaft seal with concentric tolerance?
Replies: 17
Views: 468

Re: Rotary shaft seal with concentric tolerance?

Thanks for that, but the images are just a little too fuzzy to read. The holes in the case are 1mm larger than the shafts, so I have to amend my first measurements from 1.5 to 1mm total movement, or 0.5mm from center at most. I've come to suspect that the seal manufacturers are a bit conservative wi...
by liveaboard
Sun Oct 20, 2019 5:46 pm
Forum: General Discussion
Topic: Rotary shaft seal with concentric tolerance?
Replies: 17
Views: 468

Re: Rotary shaft seal with concentric tolerance?

I took a 22mm seal I have and put a 22mm shaft in it; it's really pretty flexible. Definitely more than the spec sheet says, for that size around 0.05mm; That would be pretty tight machining. So I ordered a pair of large seals with large profile mountings. When I have them I'll try to judge whether ...
by liveaboard
Sun Oct 20, 2019 2:48 am
Forum: General Discussion
Topic: Rotary shaft seal with concentric tolerance?
Replies: 17
Views: 468

Re: Rotary shaft seal with concentric tolerance?

Weird. I can't think of a modern seal that would work off hand. Could the housing originally have had a rope seal (possibly with a hard grease ring like John suggested)? That would deform to fit the shaft and take up an offset. ...Edit... Re-reading, maybe I'm misunderstanding, this has 0.7mm of st...
by liveaboard
Sat Oct 19, 2019 6:16 pm
Forum: General Discussion
Topic: Rotary shaft seal with concentric tolerance?
Replies: 17
Views: 468

Re: Rotary shaft seal with concentric tolerance?

Grease is an interesting idea I hadn't thought of; but I'm afraid it wouldn't stay in the flat thrust bearing races. I'm thinking a seal set into a collar that would be movable like the shaft, tighten it down last after installation, when positions are set. Gear oil will make this thing happy inside...
by liveaboard
Sat Oct 19, 2019 1:13 pm
Forum: General Discussion
Topic: Rotary shaft seal with concentric tolerance?
Replies: 17
Views: 468

Rotary shaft seal with concentric tolerance?

While in the Netherlands recently, I removed a thrust bearing block from my canal boat; I noticed the shaft had an mm or two of lateral movement, so I brought it home to fix it. It turns out that it's made that way; very odd. The shaft will be bolted to the prop shaft but the bearing housing can be ...
by liveaboard
Sat Oct 19, 2019 2:44 am
Forum: General Discussion
Topic: Vise Squad
Replies: 23
Views: 2246

Re: Vise Squad

I agree.
I've never met a rigid swivel vise. the value of the movement is small and the cost is high.
If I made such a thing, it would have a 1" x 8" base and some sort of insane clamp. but even that would be a compromise.
by liveaboard
Fri Oct 18, 2019 5:33 pm
Forum: The Junk Drawer
Topic: THE END!
Replies: 9
Views: 312

Re: THE END!

Information loss has always been an issue; paper burns or rots, memories fade, you can't carve much in stone and even that won't last forever.
In this case, the information is simply being discarded because no one is willing to pay for it's maintenance.