Thank you, for your response.
I went with 932 bronze because it was the only precision ground bronze stock i could purchase from mcmaster. I wasn't able to find free access to a od/centerless grinder and being a one off part i figured i wouldn't like the price from a job shop to grind a...
I am working on restoring an old marine head (toilet) that utilizes a hand operated piston pump to intake fresh seawater and discharge the waste. for an idea of how the pump is designed picture a hydraulic cylinder whee the rod end is used to pump fresh water and the base end is used to pump...
I would add a second jam nut to Kowalski's design, currently the nut is only torqued against the spring so there's very little preload to keep the nut from loosening. adding a second jam nut and then tightening them against each other would lock the nuts on the end of the bolt. this wouldn't...
"In general does any significent nonlinearity exists in the flexible shafts?"
backlash and stiffness will contribute nonlinear components to the shafts rotational output velocity. other than that i don't think there would be any significant nonlinearities provided the scale of the flex shafts...
I am currently dealing with the ramifications of choosing an unreliable mold supplier in China ... so i would not recommend my current supplier.
I would check out Standard Tool and Mold. They were very helpful when looking for ways to resolve the issues with our current supplier but at the end...
how far are you trying to shift this axis and is ?
I have seen a couple types of flex shafts:
- sheathed braided steel cables, tend to have some backlash due to clearances between the sheath and cable and torsional rigidity is not great
- helical spring, lower rigidity the more flexible the...
I watched you video again and realized i was looking at a through shafted motor (not a motor with a solid acme shaft) ... so yes you are correct the thread of the nut is eccentric to the bearings.
you probably know this but ... the runout is a result of the acme thread axis not being in the same place as the axis of rotation. depending on how the threaded shaft was fabricated this could be a result of manufacturing tolerances at the bearing locations or that the shaft was bent. Keep in...
I suspect (as many others have suggested) that the bolted joint in the current design is not strong enough for the loads it is subjected to. When you have applied the thread locking adhesive did you see failure of the adhesive bond or did the joint loosen first?
Have you considered trying to...
Will the torque your load puts on the output of your worm gear always be in one direction?
If this torque is not guaranteed to be in one direction the backlash will be felt in the output. You will have no control over the motion of your output within this backlash region. Depending on the...
I appreciate all of your responses.
After pondering your suggestions this weekend I think I have decided on a design.
For the pulley I am going to use a tapered sleeve with a triangular profile inside. The triangular profile will engage a matching geometry on the shaft providing a positive...
Thanks, for the responses.
The taper length is limited to roughly the width of the component being attached, .5" for the plate and .75" for the pulley.
As for splines I assumed they would have backlash, is this true?
The plate can be permanently attached to the shaft but the pulley must be...
I am designing shaft that will transmit torque from a pulley at one end to a plate near the middle. The shaft is roughly 4” long and I am hoping for a .5” diameter shaft. I might be able to go up to a .625” shaft without causing catastrophic problems elsewhere in the assembly but any bigger and...
Thanks for your responses. I think I'm going to take a stab at using an o-ring and creating my own groove dimensions based off the compression in the radial seal. I liked the Forsheda v-ring but would prefer to use a cheaper seal if possible, I will keep it in mind if I fail with the o-rings.
I am attempting to seal a an output of a gearbox against water and dust. This seal is intended to make the joint weather resistant and the pressure differential will be minimal. It needs to be cheap so I was hoping to use an O-ring. The O-ring would need to seal in the axial direction between...
