Perhaps the B31.1 experts can help me understand an issue regarding unions.
B31.1 106.3 states that Class 3000 steel pipe unions, constructed in accordance with MSS SP-83, may be used provided the system design conditions are within the standard's listed pressure-temperature ratings.
B31.1...
I've installed equipment where the supplier gave 8.8 bolting for carbon steel to carbon steel. The application is wet. Now I know enough to say that A2-70 and A2-80 are not quite up to the yield strength of an 8.8 fastener. However, I'd like to change out the fasteners to stainless steel, but...
I would say it depends largely on which sanctioning body you will have to qualify the car with.
It used to be the case that 4130 was used because the rules in SCCA (? maybe NHRA) allowed a thinner wall tube if 4130 was used. I'm not so sure this is the case any longer, but it's worth checking...
I contacted the Tribtech folks, and they said that this isn't an application that applies (I believe they do include shrink fit shaft couplings though).
It looks as though for this application, there are few alternatives. There's the acrylic anaerobic adhesives, or other anaerobic adhesives...
Does anyone have experience with bolted shaft couplings that employ a friction modifier between flange faces, such as an anaerobic acrylic adhesive (possibly from a certain threadlocker manufacturer)? Can anyone suggest a type that provides high shear strength, but doesn't harden? I'd like to...
The environment is a warm 80ish celcius oil bath. I can't comment on the preload/torque as this is discovery work and I'm not able to find bolting records for this. Material, I belive is 4140. The threads don't appear deformed. I agree with Tmoose and others in that, I believe the short...
Sorry, I should have stated that.
The high vibration from the shaft through to the bearings is causing the studs to back out and the clearances to open up on the guide bearings. The plant believes it has to do with poor threadform and materials used (Chinese turbine)
Hi All,
I'm a mechanical engineer working at a hydropower plant. The turbine guide bearing takes quite a beating, and they've asked me to look into a larger diameter stud and/or different material.
The current arrangement is a threaded insert welded in place in a thick walled tub/cylinder...
In fact, the studs are drilled exactly as you described, which are installed into the crown of a hydro runner with nuts to couple to a mainshaft. The next coupling up the shaft is bolt/nut and has a hole straight through, as the step is not necessary since it's not a blind hole.
These are 3mm...
We're preparing to assemble two bolted joints, which are drilled for bolt heaters (induction, or other). The manufacturer is unable/unwilling to give us procedures to assemble them, other than to tell us the required stretch to target.
My initial thought is that all the bolts should be...
I'm interested in digging deeper into Hydraulic machinery, francis, kaplan, peltons, etc, and to understand the theory behind them better. The books I'm seeing are all written by East Indian and Chinese authors. Now, not that I doubt their authority on the subject, but is there an introduction...
I'm trying to use a Variable Section Sweep in order to cut an involute gear tooth profile through a helical datum curve.
I have 2 involute datum curves that define the section I want to cut. I'm using 'use edge' in sketcher to define the cut sketch.
The involutes and the trajectory I want to...
