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Mike I can also use the clamp to attach the coupler to the gear, so I will look into that option. And understandable, this is just the basic design for now, I will make sure that the assembly cannot be accessed by any random user. Tbuelna All right, I will look into backlash in order to reduce...

Hi Mike, I have attached the basic design of my assembly. In my assembly, a coupler connects the motor and the valve, which transfers most of the torque. Attached to the coupler is a gear, which connects to another gear and then to a potentiometer. My idea for assembly would be similar to...

MikeHalloran Yes, the application is correct, but would I not be able to adjust both the valve and potentiometer before clamping in order to achieve the angular relationship, and then apply the clamp, while being careful to not move either the valve or potentiometer? Would I still need to slot...

I can leave the clamp accessible for adjustment, however most of the clamp hubs I can find are longer than the potentiometer shaft, and the shaft isn't slotted. Are there any other solutions? Just to clarify, I'm using a gear with a clamp hub, a potentiometer, and a separate clamp. If you want...

Hey guys, I was wondering, are there any issues with using a clamp with a clamp hub gear? This seems to be a feasible option that has not been mentioned yet, and was wondering what the limitations of this option were. Thanks.

I don't have an exact level of concentricity required, I just need the shaft to be centred enough within the gear so the gear can run smoothly.

Hello, My plan is to attach a potentiometer shaft to a gear bore using a shaft retaining compound. The shaft diameter is 0.1248"/0.1245" while the gear bore diameter is 0.126"/0.125", which gives a clearance of 0.0015"/0.0002". Due to the clearance, I am concerned with keeping the shaft...

Hi All, Rb1957 1) It notes on the website and I have heard in other discussions to compare the stresses that result from the calculations to the yield strength. My assumption is that since the material is trying to fully return to its original shape, this causes the force required to maintain...

DesertFox, Thanks again for everything. Right now I'm looking into the shaft retaining compound that 3D Dave mentioned as it removes the need for the extra sleeve. If this does not turn out, I will go back to the shrink fit with the sleeve.

Hi DesertFox, Allright that makes sense, there are standard fits (with standard interferences) that are posted on the ANSI guidelines. Should I follow those standard fits or would I be able to design my own?

Also I was wondering, would nylon be able to be machined to those tolerances? If not, are there any other plastics that I can use, or would I have to go with a different fit?

3DDave: I misunderstood how the torque will applied to the load, and as a matter of fact only need the fit to withstand a load of just greater than 0.7 oz-in, so most plastics would work in this case. But yes, I will google that right away. Desert Fox: And yes, brass has a higher yield...

All right perfect I'll work on that, the only issue is determining the inertia of the parts. I have actually already selected the motor, I am more concerned with the torque that each rotating part will experience as I am designing a shrink fit and need to know the amount of torque that the fit...

Hi DesertFox, I used 0.35 as the coefficient of friction between steel and brass, and used 0.39 for the polycarbonate. That is the opposite of what you mentioned, but my sources could be inaccurate. I will double check, but would you happen to know of a reliable website?

And how would I know how much torque will be applied to each load when the motor outputs a larger torque?

Okay that is what I thought, is there anyway to predict that larger torque if I only know the final speed that it reaches?

Desertfox The gearing assembly will be attached to a balancing valve that will be fitted on pipes in the mechanical room of a building. So the temperature would most likely be around 25-30 degrees Celsius. 3DDave If I were to use brass as the material for the hub, the shrink fit would result...

Hello, I had a quick question about torque. I'm using a motor rated for 100 oz-in to drive the gearing system. I have two loads attached to the gearing system, that each require 80 oz-in and 0.7 oz-in to both start rotating and continue to rotate. My understanding is that the sum of the...

Hello DesertFox, Yes I started with both metallic options, however fiddling with the online calculator led me to plastic material for the hub, since metallic material caused stresses that were large. I am now onto plastic materials, and am trying to find the right material. I am designing a...

All right, after playing around with the calculator fit, I have found that polycarbonate (40% glass filled) would be a suitable material for hub, with a FN4 fit. Would using that polycarbonate be a good idea? I'm not too familiar with the material.