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Machine Shop and Tool Talk

Just for Fun


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  #21  
Old 01-14-2016, 10:50:31 PM
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Default Re: Just for fun.

I'm getting the urge to mess up my just cleaned lathe.

Now I'm scaring myself with the mass centralisation vs contact pin height, etc.
Maybe I should just make one and see how it runs.

http://hyperphysics.phy-astr.gsu.edu/hbase/top.html

Glenn,
I'm thinking for a pull starer to really buzz it up I'll drill a hole in the top end, and hold a rod into it while pulling the rope. That oughta be good for a billion rpm.

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Old 01-15-2016, 11:02:00 PM
ozfarm ozfarm is offline
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Default Re: Just for fun.

Quote:
Originally Posted by Ray Freeman View Post
I made one 40 mm dia yesterday. I used a steel ball. It spins easily for 5 minutes and my record id 10.35. I made a 50 dia model today and it seems it doesn't do as well. I've tried spinning on glass but best results are on a polished granite bench top.
youve run out of flies to pull wings off,

havent you
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  #23  
Old 01-16-2016, 07:23:28 AM
Ray Freeman Ray Freeman is offline
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Default Re: Just for fun.

Yes,its a while since you've been around
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  #24  
Old 01-16-2016, 04:59:48 PM
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Default Re: Just for fun.



Made this little 1" hollow spindle this morning, 3/16" carbide ball. Best spin so far 5:37.
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Last edited by Reed Engine; 01-16-2016 at 05:17:41 PM.
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  #25  
Old 01-16-2016, 05:53:19 PM
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Default Re: Just for fun.

Thanks Reed... Now I'm going to have to crud up the clean lathe.
It's a nice way to test my new uber bright LED worklight though.
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  #26  
Old 01-16-2016, 05:55:43 PM
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Default Re: Just for fun.

A clean work shop means no work done.
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Old 01-16-2016, 06:03:20 PM
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Default Re: Just for fun.

Had to clean it. The chips were about to get caught up in the chuck and start flinging them. See?? It's clean but not for long thanks to you.

Funny how the LED light color can fool a camera. The green should be red.
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  #28  
Old 01-16-2016, 06:47:06 PM
Glenn Ayers Glenn Ayers is offline
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Default Re: Just for fun.

[QUOTE=Reed Engine;1243551 hollow spindle this morning, 3/16" carbide ball. Best spin so far 5:37.[/QUOTE]

Hey Reed ... have you tried sticking a brass rod in the hollow spindle for stability/leverage .. & string starting it ? I am really curious as to how many rpm you can get with a string yank.
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Old 01-16-2016, 07:19:19 PM
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Default Re: Just for fun.

Quote:
Originally Posted by Glenn Ayers View Post
Hey Reed ... have you tried sticking a brass rod in the hollow spindle for stability/leverage .. & string starting it ? I am really curious as to how many rpm you can get with a string yank.
That's one of the reasons I did that. Nope, not yet but I plan too. There is an alternate method using a can of compressed air, I'll probably have to try that too.

---------- Post added at 05:19 PM ---------- Previous post was at 05:17 PM ----------

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Originally Posted by I like oldstuff View Post
Had to clean it. The chips were about to get caught up in the chuck and start flinging them. See?? It's clean but not for long thanks to you.

Funny how the LED light color can fool a camera. The green should be red.
I'd hate for you to see my machine.
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Old 01-20-2016, 08:36:12 PM
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Default Re: Just for fun.

I just used my milling machine that I put numerous boredom hours into to spif it up. OMG, chips and stuff all over it so I vacuumed them up before anybody saw it. Must be my OCD kicking in.

Ok Reed, post up your pigged out machine pic.
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  #31  
Old 01-25-2016, 11:03:47 PM
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Default Re: Just for fun.

My latest time waster, a spin station made out of left over 660.

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Old 01-27-2016, 08:06:20 AM
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Default Re: Just for fun.

Back at it again, the outside is actually the seat from a down hole pump used in an oil well. Material is carbide and the spindle is bronze. The ball is ceramic and used as a check in a chemical pump. Best spin so far 8:57.



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Old 01-27-2016, 08:31:12 AM
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Default Re: Just for fun.

8.5 is getting up there. I've not been able to repeat my 10.36. 5 to 8 minutes is easy enough. I have to make some more. Friends keep on wanting them.
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Old 01-27-2016, 08:40:54 AM
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Default Re: Just for fun.

I have had several offers to buy as well. I'm going to build a couple similar to the carbide pictured wit a couple of design tweaks and put them up and see if they move. If a man can earn wages in between jobs why not? I've had even more response to the spin station as well. I'm going to do a couple of those and just figure material and time and offer them up.
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Old 01-27-2016, 08:55:23 AM
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Default Re: Just for fun.

Have you considered a compressed air start model? It would be neat to check the speed with a photo tach.
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Old 01-27-2016, 09:03:47 AM
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Default Re: Just for fun.

Yes, I took a long piece of metal and held my small hollow stem upright and then blasted the side of it with my air hose. It spun a long time and didn't under around near as much. I'm more of a purest myself, an honest finger spin is the one that means the most as to a tops quality, IMO anyway. If you can get 10 minutes then the top is near to as good as they get.
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Old 01-28-2016, 07:35:19 AM
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Default Re: Just for fun.

Sold my first top last night.
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  #38  
Old 01-30-2016, 01:22:37 PM
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Default Re: Just for fun.

Made another like the one I sold, spun 10:36 right out of the gate.



Sold.
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Last edited by Reed Engine; 01-31-2016 at 07:04:09 AM.
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Old 01-30-2016, 06:47:37 PM
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Default Re: Just for fun.

Sweet !

Would be fun to know the RPM

Doesn't someone make a "Phototach" that you put a white mark on the spinning object & the tach picks it up ?
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Old 01-30-2016, 07:02:10 PM
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Default Re: Just for fun.

Beautiful work reed. I'm gonna whittle one up as soon as I finish cleaning the basement.

Lots of opto tachs out there. Here's a cheap one.
http://www.harborfreight.com/digital...ter-66632.html
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