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Thanks Greg. I had thought of rolling the radius leading down to the necked section or perhaps peening it, but forging the whole center sounds like a good option. Wonder if forging without machining or grinding would leave too rough of a surface finish...negatively affecting fatigue? Any...

Thanks Greg, I was assuming I would start with a forged bar and machine or roll from there, but I am not that familiar with stud forging. Do you mean forging the bar complete and then rolling the threads? Is it a cold or hot forging process and what material properties could I expect that...

Hi, I am designing a bolted joint and I'd like to bounce a couple material selection and manufacturing questions off the knowledgable folks here. Imagine I have a 50" stud with 3" of 1.75"-8 thread on each end. Due to geometry and space constraints the clamped member is not as stiff as I would...

Wow the Kennametal site is cool, bookmarking that one now. Thanks guys, should have thought to check the Machinery's Handbook......pretty much the answer to everything in there :)

Since your not allowing the contact points to 'wear in', the initial surface finish is more ciritcal to achieve high levels of repeatability. Keep in mind, the surface roughness must be compressed before the inherent stiffness of the elements develop a repeatable resting position...

Can anyone point me to a good resource for calculating cutting force on a tool insert? Even a plot or measurement would be a good starting point.

Thanks guys! I will check out the references listed!

Hi, I have two steel beams that will be joined in a T-shaped geometry. I have completed the load analysis, but I have little experience is in the appropriate method for joining of these memebers. I have a fairly good reference text for designing a bolted connection, but I am largly ignorant...

Good information, thanks! The cost savings of reduced down time of the machine will definately outweigh the extra cost of the tool steel, so I think thi is a viable option.

Thanks TVP, - It is a hydraulic application, so it is lubricated between the sleeve and pin. - 3.996" OD, 22" length Pin - 4.000" ID, 5.370" Length Sleeve - Runout within 0.001" - 0.005 - 0.015" distortion from carburizing. The case is spec'd at 0.06" (is it realistic to expect a reliable case...

Cory, Thank you for the response. Here are some more details. Surface Ra on the pin is 8 uin (at least that's the spec anyway). If I had to guess, it probably looks more like 16. Operating temperature is probably 75-85 F. Forces are a bit tougher to get a wrangle on. Under perfect...

Hello, I have an old machine that employs a guide pin machined from 8620 steel that is case hardened to 50-60 Hrc that has been galling against a sleeve of 4140 hardened to 35-40 hrc. This is a recent occurance, and my research indicates that the carburizing process used to harden the shell may...

Having trouble getting Lee to return my calls or emails. Unlikely that they would want to make the small quanitity of plugs I need in a custom size anyway. I believe at this point I will have to do my own design and have a local machine shop fabricate them. I would appreciate some guidance...

Thanks for the info! I will give them a call tomorrow and post back with what I find.

Hello, I need to plug a hole in a high pressure (15000 psi) hydraulic assembly. I have the freedom to drill or thread the hole to any desired size over 1.375". I have tried to locate an OEM cone and thread style plug with no luck for this size range. Any suggestions for vendors or alternate...

Thanks zappedagain. I think I am getting close. After some trial and error this morning, I have successfully read in the data from the text file using the "read from spreadsheet file.vi", "index array.vi", and "build waveform.vi". The three signals merge into a "waveform graph" and display...

Hello, I apologize if this has been covered but I can not seem to find a solution. I am fairly new to Labview, and I am having difficultly getting my application to work properly. I need to output some cutom waveforms from a DAQ card for some motor testing. I have been trying to create a vi...

Excellent information everyone. Thank you. This application requires a flexural mechanism, and this was my primary motivation for examining metals. However, the difficulties of using metals in this case may certainly justify a different approach. The pressure in this application is less than...

I guess I should have mentioned that I had already done this. Could you please direct me to the thread? I conducted a search in the corrosion forum for 'sulfuric acid corrosion' before I posted and was unable to find a solution. There were somewhere in the neighborhood of 90 post so it is...

I need advice on selecting a material that will not experience corrosion from sulfuric acid. All concentrations with working temperatures of -100 to 200 degrees F will be experienced. If velocity of the fluid is an issue, assume 300 mm/s. Thanks!