Question: In the last pic, what are we looking at cost wise?
(Of the hydraulic components)
Thanks, Sid
1/12 Scale Cat D11 Bulldozer project
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Originally posted by Frugalguido View PostI question for RB, how long did it take you to learn the CAD program to be able to do these drawing? And where did you learn it? Nice job!
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I question for RB, how long did it take you to learn the CAD program to be able to do these drawing? And where did you learn it? Nice job!
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A thought crossed the void in my head, last year I refitted my 3 ton excavator with things called “ city tracks” steel plate on the chain with dense rubber pads, all kinds of clanking and jumping when crawling or skidding or finally gave in and replaced the sprockets, tooth count wasn’t the problem it was radial pitch out for the chain, worked fine after ( the council didn’t like me on the public highway with wedge tracks)
mark
ps looks to be a great model, I do like CAT. And jcb for that matter
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Been busy with a lot of stuff since being home, from computers to drones. Some more goodies came in from AliExpress like cylinders, radio control valves, and a really cool miniature hydraulic filter. I also got my FDM printer going again so I’ll print a few track test pieces. Tomorrow I’ll post pics.
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I should correct myself-Tracks aren’t exactly like roller chain. The bushing is press fit into the inner rails. The pin is press fit in the outer rails.
So-the bushing is not free to rotate relative to the link it’s part of. Pin, of coarse, rotates within the bushing.
Basically a chain made of “half links”.
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Originally posted by Willy View Post
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I’m going to use 5/16 1” dowel pins. Aren’t they hardened? The sprocket can be a wear item. Maximum RPM of the sprocket will be around 150 RPM all out. These things aren’t speed demons. I do enjoy the conversation.
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Originally posted by Willy View PostBushings in these types of service stand up way better than a roller since they can withstand and carry much higher loads due to the large surface area compared to a roller.
Impact and shock loads are the death of a roller. Ditch Witch runs fine on sand and dirt, rocks not so much.
as far as shock iv spent hours riding basically what looks like a mechanical bull - stinger intermittently contacting and chunking out massive granite rocks with it's carbide teeth and the only real concern for me was worrying about my kidneys as the entire machine is bouncing up and down on nothing but it's roller chain connected to carbide spikes....
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Originally posted by SVS View Post.
Bushings don’t rotate and there is no need for them to. Look at a roller chain. Do those bushings rotate?
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Bushings in these types of service stand up way better than a roller since they can withstand and carry much higher loads due to the large surface area compared to a roller.
Impact and shock loads are the death of a roller. Ditch Witch runs fine on sand and dirt, rocks not so much.
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