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Post by cpdad on Jul 17, 2012 19:07:07 GMT -5
the lake here has become so low that it's not safe at all...so the watercraft have been put up for the summer...unless something changes.
i will take care of any machine shop related items that you may need....repair of shafts...new shafts....repair of motor shafts ( if possible)...ends of motors....12 bucks an hour....plus actual cost of material...plus you pay shipping both ways....doesn't have to be lapidary related either.
the only thing that i ask is no RUSH work....if you are someone that runs equipment 24/7...you really need to pay the 70 bucks an hour at your local machine shop.
will quote a price on the board for machine work...not shipping...cause that is what it is...feel free to post in this thread with pics of stuff you may need....ask for advice of machine work...i will do my best to help...as will others....if you are better off getting new stuff....or having it repaired locally...i will be more than happy to tell you so.
i will bump this up every few months....if i get slammed at work...and cant offer for a little while....i will post that also...kev
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Post by deb193redux on Jul 17, 2012 19:37:42 GMT -5
Kevin - too bad about the lake, but glad to see you on the board
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milto
starting to spend too much on rocks
Member since January 2010
Posts: 162
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Post by milto on Jul 17, 2012 19:39:56 GMT -5
What part of the country are you located?
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Post by Bikerrandy on Jul 17, 2012 20:05:10 GMT -5
$12 an hour is cheap!!
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darstcreek77
has rocks in the head
Member since April 2011
Posts: 673
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Post by darstcreek77 on Jul 17, 2012 21:26:46 GMT -5
where are you located ?
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Post by cpdad on Jul 18, 2012 7:08:59 GMT -5
i'm in Augusta, Georgia
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rykk
spending too much on rocks
Member since September 2011
Posts: 428
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Post by rykk on Jul 18, 2012 23:59:34 GMT -5
Do you do lathe work/fabrication? I'm looking for a 3/4" shaft with one end about 3-5mm eccentric to the main axis of the shaft. Thanks, Rick
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Post by cpdad on Jul 19, 2012 7:01:14 GMT -5
rick...eccentric shafts are no problem at all....post the length of the main shaft...the diameter and length of the eccentric part of the shaft and i will make a quick hand drawing of the shaft and post it here for you to give it the o.k.....even better if you can make one....either way no problem....will quote price when i have the details....kev.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Jul 19, 2012 11:10:39 GMT -5
I emailed you a query. thanks
scott
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rykk
spending too much on rocks
Member since September 2011
Posts: 428
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Post by rykk on Jul 20, 2012 1:32:05 GMT -5
Scott - I sent you the info you needed on the Lortone vibe lap motor.
Kev - I'll let you know in a couple of days after I think it through a few more times. If you are familiar with vibrating laps, you've probably figured out that I'm wanting to build my own homemade version with the Reciprolap and newest Lortones' type quasi-reciprocal motion but one that doesn't jiggle as drastically as the Reciprolap does. Its been just such a constant battle trying to minimize the up/down thrust of the old Lortones' spinning weight design and I want to see if I can cobble together a sort of hybrid using the pans from my Lortone that only vibrates laterally without bouncing vertically while it's at it.
My first blush guess is a shaft 1" thick and maybe 6" or 7" long. The eccentric part would need to be a standard diameter like 3/4" and only need to be long enough to fit into a 4-bolt pillow block bearing mounted to the bottom of a 20" vibe pan - maybe 1 1/2" or so long. Would want to minimize the length of the eccentric so as not to create too much shear tension between the pillow block and a second one on the shaft mounted to a solid frame opposite. And then a few inches to yet another bearing and a v-belt pulley stacked below that. Could probably turn down that end concentric to something like 3/4" since I think I've seen sheave pulleys around 5-7" in that bore size. I don't think I'd want to shake the pan in this fashion at 1550rpm. And I'd not need as hefty a bearing on that end and the smaller, the cheaper.
As to material, Aluminum is probably cheaper than hardened stainless but I'd have to see how the shear strength compares to steel. I think I've seen that its at least as good as cast iron but didn't have the need to pay much attention to steel when I was researching and came across that data. The pan I'd shake isn't nearly as heavy as the Reciprolap - Aluminum, maybe like 12lbs - but there'd still be 25-30lbs of rocks and weights in it. And the excursion probably only needs to be 3-5mm rather than the freaken 1/4" or 1/2" the Reciprolap shaft looks like its hauling around and that would mean less shear stress on the shaft.
Anyhow, this is actually a pretty complete guess other than the length. C-ya, Rick
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Jul 20, 2012 9:42:37 GMT -5
It would be great to see pics of the build. Love innovation. Jim
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Post by cpdad on Jul 20, 2012 11:43:14 GMT -5
rick remember when doing your research on shear that there is 2 types.
there is ultimate shear strength...this the point in which metal will break or split.
and yield shear strength....this is the point when it will deform.
gone for the weekend...catch yaw later....kev.
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Post by phil on Jul 20, 2012 12:23:12 GMT -5
Do you braze blades with a small (3/8 inch) nick?
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rykk
spending too much on rocks
Member since September 2011
Posts: 428
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Post by rykk on Jul 22, 2012 15:43:38 GMT -5
Kev - Looks like alloy steel is the best. Especially when it comes to fatigue limit. I reckon I could calculate how many times the eccentric will be slinging the pan per day at a few hundred rpm but... well, it's a LOT! C-ya, Rick
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Post by cpdad on Jul 23, 2012 10:46:18 GMT -5
sorry phil....as far as i see...welding on a blade could possibly cause bad things to happen....i would love to take a few dollars from you ;D....but i will have to pass on this one....kev
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rykk
spending too much on rocks
Member since September 2011
Posts: 428
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Post by rykk on Aug 2, 2012 14:36:25 GMT -5
Hey, Kev - Still interested in doing the offset shaft we talked about? Rick
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Post by phil on Aug 2, 2012 16:38:14 GMT -5
How much for an adapter from a 1/2 inch motor shaft up to 1 inch diameter thread like on the end of a polishing shaft? Standard thread, not reverse. 2 set screws for on the 1/2 inch shaft flat area. Thanks!
(motor is a 1/3 horse dayton, 1725 rpm, 1/2 inch shaft, etc)
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Post by cpdad on Aug 2, 2012 17:14:19 GMT -5
rick....whenever you are ready.
phil...can you scribble a simple drawing on a piece of paper and scan it for here....if its what im thinking....shouldnt be more than 12 bucks plus shipping....kev.
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Post by phil on Aug 3, 2012 13:46:03 GMT -5
Ok. Here's my attempt at a sketch. Let me know if I left something out. $12 ish plus shipping sounds good. Let me know.... Thanks! Phil Attachments:
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Post by cpdad on Aug 3, 2012 15:14:40 GMT -5
phil....i have 2 questions....what the hell does A/R mean ;D ;D ;D
and are the 1" threads fine or coarse threads...kev.
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