Recent content by TokerM

Is it that I'm not giving enough information? If so, what more information is needed? I'm not an engineer by trade, I'm a mechanical designer, so I don't know what calculation to look up. Can someone at least point me in the right direction here?

I am trying to find out how much force is being transferred into a drive chain. Here's the info as I was given: Motor: 150HP RPM: 1750 Gearbox information: ratio: 39:44 Input HP 223 Output shaft to sprocket 6" dia. Sprocket 20" dia. Top of tooth to bottom of root 1-3/8" 4" pitch of chain No...

That's what I was afraid of... As the old adage goes... "Back to the board!" Thank you for helping with the calc. From that I can find a workable setup.

One view is to be superimposed over the other. The thumb lever, and pusher lever are fixed to the same shaft. In plan view, the pusher lever is "L" shaped to "hook" on the tooling. The tooling is similar to a ladder runglock. Due to NDAs, that's all I can say. I'm really only looking for...

95 views and nobody knows how to set up this calculation?

I probably should have been a bit clearer there. My company is in a couple areas, mostly we do heavy press mfg. (extrusion & forging presses, rolling mills, B.O.Ps, etc...) in the U.S. with contracts in Germany & Canada. We have never needed a mech engineer, with a cert & stamp to sign...

First... YOU DO NOT NEED A PE CERT! Very few things REQUIRE a PE to sign off on them. The only one I really know of is nuclear plant design. Westinghouse pushes their M.E.s to get certs. Civil engineers usually have to sign off on site plan/foundation drawings for local code regs, but in...

Wanna know how much your final DoD armor req's are going to weigh? No... you don't. That would eliminate 4-cyls and most other gas engines. If you're looking at fuel, it has to be on the diesel end (Mil combat vechs run on either straight diesel or JP-5 (jet fuel) they don't like the idea of...

"Oilite" bushings would seem to be the most cost-effective method here. Unless we are talking HIGH-speed and VERY tight tolerances required. But for the system it looks like you have, I would suggest drilling bearing bores thru the top & bottom capture plates while they are clamped together to...

I have attached a pdf file showing the calculation in question. The 2 views in the pdf are section in the same line. When the operator presses the thumb lever, the pivot shaft rotates the pusher lever which in turn rotates the tooling. The tooling is forced open via the compression spring...

Thank you Bob, I'll use a general rate of 5#/in. I'm getting confused on actually selecting a spring to purchase. I'm looking at buying a 36" long spring from McMaster-Carr, and they only seem to list spring constants and coils/in. I don't see how those numbers translate to the rate. On...

I need a little help in figuring out spring rates for a system I'm working on. I'll try to describe it as best as possible: I want to lower a growing stack of material (tubes) from an elevation to the floor. As more tubes are stacked, more weight is added to the system and the load lowers...