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Author Topic: Kinetic sculpture designed by Clayton Boyer  (Read 26211 times)
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John T
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« Reply #45 on: December 10, 2016, 11:20:55 AM »

Hi Dan,
I was wondering if you ever used Glycerine for a lubricant?  Its about the slippyies t stuff I know if you get it on your hands but I have no idea if it would work on slow moving items such as a kinetic art piece.

John
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1% inspirati on 99% try, try again
Kineticrazy
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« Reply #46 on: December 10, 2016, 01:26:17 PM »

Dan,
   That's a great idea to loosen up your bearings!! I've got a fresh box of bearings awaiting treatment .

Thanks for the tip,


Eric

P.S.  I've rung quite a bit of seawater out of my socks as well !!
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Ya-Nvr-No
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« Reply #47 on: December 10, 2016, 02:02:12 PM »

Scares me!  Shocked


* glycerin.JPG (31.27 KB, 762x237 - viewed 551 times.)
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Dan Mauch
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« Reply #48 on: December 10, 2016, 05:01:33 PM »

 Here is a short video that I just made to demonstra te the differenc e between a non spun up bearing and one that is. Be careful if yoy try this as I would estimate the speed at 100K RPM  https://www.youtube.com/watch?v=MW3EmghwEfQ&feature=youtu.be

Dan

Dan,
   That's a great idea to loosen up your bearings!! I've got a fresh box of bearings awaiting treatment .

Thanks for the tip,


Eric

P.S.  I've rung quite a bit of seawater out of my socks as well !!
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Kineticrazy
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« Reply #49 on: December 10, 2016, 09:28:07 PM »

Dan,
    Thanks for taking the time to make the video. Good stuff.

Appreciat ed,

Eric
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ArtF
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« Reply #50 on: December 10, 2016, 10:00:56 PM »

Thx Dan..grea t idea..

Art
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Kineticrazy
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« Reply #51 on: December 11, 2016, 12:55:42 AM »

Dan,
   I noticed the bearing in the video was still shielded. It was suggested in another thread to remove the shields, soak and clean the bearings with mineral spirits and then soak and lubricate them with silicone. Do you go through the same process?

I was wondering if anyone has tried thrust bearings. I happened upon them when poking around the internet. ..here's an example..

https://www.amazon.com/51100-Thrust-Bearing-10x24x9-Bearings/dp/B002BBJSDG/ref=cm_cr_arp_d_product_top?ie=UTF8

Thanks,

Eric
« Last Edit: December 11, 2016, 05:34:15 AM by Kineticrazy » Logged
Dan Mauch
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« Reply #52 on: December 11, 2016, 10:49:42 AM »

 No i haven't removed the shield. At the time I did Zinna I had the shielded bearings and by running them with air I felt that was about as good as I can get. But I will keep your method in mind and later this week will remove a shield and see if I can make a quantitat ive improveme nt with bearing and no shield.

I have been using Torringto n NTA-411 and TRA-411  (1/4" ID) thrust bearings and washers for years. My Horsing Around sculpture s uses them on all the between the spring spool and the wooded backing. Anywhere there could be any drag between the rotating and stationar y parts.

Dan Mauch

Dan,
   I noticed the bearing in the video was still shielded. It was suggested in another thread to remove the shields, soak and clean the bearings with mineral spirits and then soak and lubricate them with silicone. Do you go through the same process?

I was wondering if anyone has tried thrust bearings. I happened upon them when poking around the internet. ..here's an example..

https://www.amazon.com/51100-Thrust-Bearing-10x24x9-Bearings/dp/B002BBJSDG/ref=cm_cr_arp_d_product_top?ie=UTF8

Thanks,

Eric
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Kineticrazy
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« Reply #53 on: December 11, 2016, 02:31:09 PM »

Dan,
   I'm learning a lot. I just studied up on thrust bearings a bit, there are lots of design options to eliminate friction. Have you found a supplier with a decent price? If you need more than 2 or 3  it's gonna get pricey quick.



Another great suggestio n,

Thanks again,

Eric
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Dan Mauch
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« Reply #54 on: December 11, 2016, 05:55:44 PM »

Try http://www.vxb.com/

Dan Mauch
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AndyUK
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« Reply #55 on: March 02, 2020, 01:43:36 PM »

Hi All,

I'd like to make a ticker based on Clayton Boyer's Zinnia - but I'd like to do it the hard way, so I'm avoiding the plans for now. I've got a few questions before I move forward:

Regards the spring that Mark so helpfully divulged the specifica tion of, unfortuna tely the postage to the UK is quite expensive . I've been trying to find an alternati ve, but an exact duplicate is proving elusive. Could anyone suggest if this one is suitable? If not - can you see a suitable alternati ve from the seller?

https://www.aliexpress.com/item/32813640339.html

Now, bearings. I've been thinking of using Needle Thrust Bearings. Would these below be suitable? I was thinking of using a precision 12mm main shaft as in commonly used as an inexpensi ve linear guide - it seems a lot of people us threaded rod, but that strikes me as a sub-obtimal choice, as the shaft not having a constant diameter can't be helping things.

https://www.ebay.co.uk/itm/AXK1226-Needle-Roller-Thrust-Bearing-thin-washer-bearing-with-2-AS-Washers/273885199745?hash=item3fc4d47d81:g:9GYAAOSw9 6Fco2hk

How critical is the design of the three wooden latches on the back of the output drum? My current thinking is that I just have to limit their motion to either engage well with the pin on the rear vane, or flick out the way completel y. Why are they typically quite large?

Thanks!
Andy
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Dan Mauch
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« Reply #56 on: March 03, 2020, 01:06:23 PM »

I built my version of Zinna about 5 years ago . I cut my design out with a laser. As I recall I could not get the correct part from SDI becuase they were out and it would take several months before they had them. I did a search and found the supplier that makes them for SDI and here is what I found
spring width 3/8"
spring length 106"
torque 1.13Lb in


* zinna.JPG (4768 KB, 3872x2592 - viewed 642 times.)
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Aviv
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« Reply #57 on: December 16, 2020, 01:57:52 PM »

Dan,
   I noticed the bearing in the video was still shielded. It was suggested in another thread to remove the shields, soak and clean the bearings with mineral spirits and then soak and lubricate them with silicone. Do you go through the same process?

I was wondering if anyone has tried thrust bearings. I happened upon them when poking around the internet. ..here's an example..

https://www.amazon.com/51100-Thrust-Bearing-10x24x9-Bearings/dp/B002BBJSDG/ref=cm_cr_arp_d_product_top?ie=UTF8

Thanks,

Eric

For kinetic sculpture s, that are not experienc ing high loads (I think?), would it be valuable to wash the bearings in mineral spirits, to remove the lubricati on in order to reduce friction, without lubricati ng back?
I know the lubricati on is there for a reason, but it also adds friction, and maybe for the weights involved in kinetic sculpture s this isnít an issue?
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ArtF
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« Reply #58 on: December 16, 2020, 02:50:44 PM »

I'd agree with that, so long as it isn't wobbly.. the least resistanc e as possible is
desirable ..
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steve323
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« Reply #59 on: December 20, 2020, 02:34:39 PM »

I have been testing various bearing configura tions for pendulum supports. It is not exactly the same setup as a kinetic sculpture, but I believe some of the same principle s apply. Less friction is better.

The load is around 8 ounces. I measure the time that it takes for the swing to degrade from +/-8 degrees to +/-1 degree.

Here are the swing times of various 623 (3x10x4mm) ball bearing configura tions:
    5m 50s  sealed with factory grease intact
    7m 40s  shielded with factory grease intact
  14m 00s  shields removed and cleaned - low end of range
  20m 50s  shields removed and cleaned - high end of range
  24m 30s  shields removed and cleaned with Teflon dry lube added

The bearings were generic eBay versions costing around $5 for 10 bearings. 3 of the 10 were slightly tighter than the others. The remaining 7 would probably all last around 20 minutes or better.

My clock with ball bearings for the pendulum support has been running non-stop for two years with no signs of wear. Running then dry seems OK when the load is significa ntly lower than the rated max loads.

Steve
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