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I am trying to output the data from graph tool in mechanism. I can output the text file (.grt file extension), but when I chose to save the excel file it acts like it saved the file, but no file is generated. It allows me to choose a file location, and no matter how I search I can not find the...

I am having a issue with comparing data sets from two assemblies via mechanism. I built the first assembly and ran the dynamic analysis and exported the data via text file to excel. I did a file copy to get a second assembly and varied one of the parts in the assembly. I ran the dynamic...

I have a HK series drawn cup needle bearing with a steel cage and outer shell. In some cases the cage is coming in contact with the shaft (acting as the inner race). By looking at the bearing construction I can not see how the cage can touch the race, while the rollers are in position. Has...

We have had some prototype parts made from Si3N4 for testing. The testing went well, but we now need a manufacturer to make 500 to 1000 parts. It is a cylinder .500" O.D. with a 0.25" ID and is .25" wide. Who are some of the manufacturing companies that I can contact for a quote? Thanks for...

Unclesyd, Thanks for the info. I can not use Kolene, but I will give bodycote a call. Dan

I need to get parts Salt Bath Nitrided and am looking for companies to do it in the USA. Are there any companies that you would recommend or not recommend using? The parts are made from 4140 / 4142 PHT with an Rc = 30. Thanks for the help. Dan

EdStainless, Of course it has shock loading and moves at a high rate (small oscillating motion); if it didn't my job would be no fun (insert smile). The shock loads vary in magnitude and are not easily measured or calculated, thus we have approximations of what they are. Are you concerned...

The roller is the only part, by this I mean the roller rides on the pin (inner race) and the outer housing is the outer race (due to size restraints there is no room for a true inner and outer race). At this point we are done with the needle bearing. I am more interested in pursuring a...

We are using a 0.048" diameter roller, and we use a full complement without the cage. The coefficient of friction for the bearing starts out good, but as the pin wears it goes off the chart, so if the bushing can hold together the coeff. of friction should stay more constant.

I am trying to replace a needle roller bearing (no dedicated inner and outer race per say, uses pin and outer housing for races) with a bushing. At this point I need to find a material I can machine myself to make the bushing. I have looked at Glacier Garlock LB9-machined bronze as a possible...

metengr, Thanks for the valuable information. That pretty much sums up all the data I need. Dan

I am in the process of designing a part made form M-2 tool steel, which will need to be welded. I will have two tubes 0.600" in diameter with 0.050" wall thickness. The tubes will be "butted" together with a small overlap on the I.D. for centering then welded. The welding will be done pre...

I am trying to find a general torque "rule of thumb" spec for the following fastener sizes: 6-32 6-40 8-32 8-36 10-24 10-32 The fasteners are holding cover plates and are being threaded into Aluminum, due to the nature of the application the only stress is what is induced by the applied bolt...

griffengm , I am mainly looking for a procedure that can be done in a few minutes on a bench top. The reason I have stayed away from solder and brazing is the time and equipment needed to do this. It is my understanding it would take an oven of some sort to heat the parts and braze the...

Thanks for all the help. I am contacting all the vendors to get test samples of their best adhesive system.

I am not set on using Loctite. Is there an industrial adhesive out there (two part epoxy??) that may do better than the products that Loctite produces? Thanks for the help so far. Dan

The two parts are 4130 steel. The surface finish is as machined, Ra ~ 15 uin. The Loctite to this point seems to breakdown. There are still remnants of the Loctite, but the two pieces are free.

I have a tube with a 0.300" hole through the center. I need a compound that will allow a user to assemble an insert into the tube via a slip fit, but when cured will not come apart. I have tired various loctite compounds (272, sleeve retian compound), but the inserts come loose during usage...

Funnelguy, Can SiC and other ceramics handle shock? The impression I have of ceramics is they can not handle any shock loads; this rod is an actuator with an input frequency of around 83 Hz (5000 rpm). Alex, I was told that the ferro-titanit does not have very good wear...

I am designing a part that is a long slender rod that must be very stiff. Most of the steels I have looked at have a modulus of elasticity that is very similar. Is there an alloy that has a very high modulus of elasticity (maybe a metal matrix)? I am not concerned at this point about buckling...