Fulcrum for Compound Machines? General Discussion about useful equipment as well.
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Fulcrum for Compound Machines? General Discussion about useful equipment as well.
What can I use as a fulcrum for my compound machine? I was thinking perhaps a door hinge. Any other information that pertains to machines that you wish to share I would be more than glad to hear. I still have to order my wood and practically all the parts for my team's machine; if anyone has any good experiences with particular woods or other parts that would be godsend.
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Re: Fulcrum for Compound Machines? General Discussion about useful equipment as well.
I used flanged ball bearings as my fulcrums for my compound levers. I drilled through a piece of aluminum and inserted the ball bearing into the hole. A dowel is then inserted through the ball bearing, which is attached to a vertical beam.
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Hicksville High School Class of ‘22
Hicksville High School Class of ‘22
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Re: Fulcrum for Compound Machines? General Discussion about useful equipment as well.
Thanks for replying. This makes a lot of sense; I'll give this a shot. Do you have any idea what I could use for the wood for the vertical beams and then the base that the beams would be install onto? I have to order the parts from Amazon ASAP, and I can't find any wood that would work as the beams. I'm not sure if I'm not using the write keyword, but all I can find are boards that are good for perhaps a base but seem too thin to be beams.
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Re: Fulcrum for Compound Machines? General Discussion about useful equipment as well.
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Re: Fulcrum for Compound Machines? General Discussion about useful equipment as well.
For the base, I used a 2x4 which can be bought from Home Depot. The vertical beams I used was pinewood which can also be bought from Home Depot. I wouldn’t buy wood from Amazon as the quality of the wood is uncertain and can vary.
Is it called success if you never failed?
Hicksville High School Class of ‘22
Hicksville High School Class of ‘22
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Re: Fulcrum for Compound Machines? General Discussion about useful equipment as well.
Can someone please explain how to make it so the fulcrum fits perfectly with the beams? Like did you guys just use a drill and drill the same size screw into the beams and use that as the fulcrum? Or was there a hole drilled and a dowel was used as the fulcrum? And if so how would you find the perfect size? Thanks
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Re: Fulcrum for Compound Machines? General Discussion about useful equipment as well.
I used a ball bearing with a outer diameter of 1-1/8” and an inner diameter of 3/8”. The hole that was drilled through the beam was drilled by a 1-1/8” Forster bit. This would allow the bearing to fit perfectly into the beam.was there a hole drilled and a dowel was used as the fulcrum?
Because the inner diameter of the ball bearing was 3/8”, I used a dowel that was 3/8” in diameter and placed it through the ball bearing, and the dowel is connected to the vertical beam.
Is it called success if you never failed?
Hicksville High School Class of ‘22
Hicksville High School Class of ‘22
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Re: Fulcrum for Compound Machines? General Discussion about useful equipment as well.
Mine is just a bolt. The lever arm has a 3/16 hole drilled in it and the bolt is 1/4. Getting around 29/30 on ratio scores in practice
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Re: Fulcrum for Compound Machines? General Discussion about useful equipment as well.
If you have access to a drill press, that is the way to go. Keeps the hole for the fulcrum level.sciolymachine wrote: ↑January 5th, 2020, 10:50 am Can someone please explain how to make it so the fulcrum fits perfectly with the beams? Like did you guys just use a drill and drill the same size screw into the beams and use that as the fulcrum? Or was there a hole drilled and a dowel was used as the fulcrum? And if so how would you find the perfect size? Thanks
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Re: Fulcrum for Compound Machines? General Discussion about useful equipment as well.
I find that PVC pipes work pretty well.LackJeff wrote: ↑December 26th, 2019, 9:11 am What can I use as a fulcrum for my compound machine? I was thinking perhaps a door hinge. Any other information that pertains to machines that you wish to share I would be more than glad to hear. I still have to order my wood and practically all the parts for my team's machine; if anyone has any good experiences with particular woods or other parts that would be godsend.
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