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PDM=Positive displacement motor. I am the manufacturer. Just trying to get a good sense of what the thrust bearing stack should be? It includes races and ball bearings in a stack of 5 races inner and outer. I can not find anything as a gaug for it. Thanks

Hello, Anyone know how to determine the max torque on thrust bearings in a PDM? How to determine how much pre-load you need on a thrust bearing stack? Any information or resources would be greatly appreciated. Thanks

I do not have that book. Do you know where I can view just that page in question?

It is a stainless steel material (the shaped spring). I am not sure what deflection I am needing or force. I want it to be about the same force of a potato chip clip. I cannot find anything about potato chip clip force or deflection online. Thanks for all your help

anotherhttp://files.engineering.com/getfile.aspx?folder=90519783-e42f-4f80-9489-c2dcdb8afd1b&file=metal_spring_clamping_force_1.png

Here is some more pics let me know what I am missing. Thanks for your help.http://files.engineering.com/getfile.aspx?folder=d2ab837d-f56d-40c1-8a07-0718d93edc9b&file=metal_spring_clamping_force_2.png

I tried to add it. Let me try in here.http://files.engineering.com/getfile.aspx?folder=ae3db475-740c-4033-9911-53b1b9b4e3c6&file=clamping_force_test.png

Does anyone know how I would calculate the clamping force of this piece? It is Stainless Steel.

I am needing help making the box and pin for this thread. It is 4 T.P.I. 1.25 TPF. Thanks

Thanks for all the help. Sorry so vague, on topic, have to be discreet on certain things.

LOL. I see I need to be more specific. Under google patents for constant velocity joint there are different variations of designs. There are designs with a spline and ball groove combo and some with just the ball groove design no spline. I believe a bigger cross sectional area provides more...

I am researching max possible torque for a design for a cv joint. My question is: There are ball groove type with splines and just ball groove designs. Which design would produce the most torque? If there is anything you need to know more just ask. Thank you for responding in advanced.

Well with one hole the flow rate is 40 GPM through it but with 3 holes I believe each hole will take a portion of the 40 GPM through it. It will then feed back into the main through hole to the bit at 40 GPM. I may be wrong but that's why I am here to find out. Thanks for the help and have a...

Thanks for the responses. I used the calculation Flow rate (in^3/s)= GPM x 231/60 to give me 154 in^3/s. Then I used equation velocity (ft/s)= Flow rate(in^3/s)/(12 x Flow area (in^2)= 45 ft/s for 3 holes and 66 ft/s for 2 holes and 133 ft/s for one holes. Assume it is a ideal fluid running...

The dimensions are in inches. Positive displacement motor. Forgot to answer that part.

Thanks for the responses. The fluid median is drilling mud. The fluid comes into the motor at 40 GPM then channels through the 3 .35 diameter holes that feeds into the .35 diameter thru hole(as seen in the pic). Will the flow rate change, due to it now going through 3 holes versus 1? I know the...

I am needing help to calculate the flow through this piece. I have attached a photo stating the question. Thanks for any help.http://files.engineering.com/getfile.aspx?folder=832beede-dbe4-4af5-bae1-da0a5b07dae4&file=flow_calc.jpg

Hello, I was wondering if anyone has any information on the design process for these kinds of motors? Any PDF? Resources etc... Thanks in advance. If there is anything you know about mechanical breakaway connections for coiled tubing, that would be a plus. Thank you.

Been there done that. Can't find anything with thread profiles at all.

Does anyone have any information on these threads? Maybe a PDF to share. Thanks