What are the best ways to remove hardened epoxy from metal parts? We have hundreds of small metal parts that have two halves epoxied together. We need to take them apart. We do not want to destroy them because we eventually will have to epoxy them back together again. I do not know what the...
I need to bond a small .030 thick x .60"tall x 4"wide aluminum nameplate on a baked enamel painted chassis. It will be mounted on a vertical side of the chassis. It needs to mounted securely but still be able to be removed in a year or two. Also, when it is removed, the painted surface it was...
I am dimensioning a sheet metal part. There are many holes and I am using two edges of the part to locate the first hole, which will be my (0,0) datum. All of the other holes will be dimensioned from this datum using ordinate dimensioning. I am doing this because our sheet metal fabricator...
What can provide a better, more scratch resistant and chip resistant painted surface on an chassis that will be handled and moved from bench to bench many times a day, in doors? Would a MIL-Spec liquid paint or a powder coating be better? If a Mil-Spec liquid paint would be better, which...
I have several questions. Is polyurethane per MIL-C-85285 a good choice of paint for a chassis which is staying indoors? Is Epoxy primer per MIL-P-23377 the correct primer? What would be the correct chem film callout, Mil-C-5541 Class__? and Type__?.
What is the finest grit belt you can...
I need to design a shiney looking wear surface. A 6" square, 3 pound aluminum chassis will slide over it about 10 times per day. If the wear surface was steel, would chrome or nickel be a better durable coating to put over it?
If the wear surface was stainless steel, would chrome or nickel be...
I need to design a shiney looking wear surface. A 6" square, 3 pound chassis will slide over it about 10 times per day. If the wear surface was steel, would chrome or nickel be a better coating to put over it?
If the wear surface was stainless steel, would chrome or nickel be a better coating...
If I have some bends with the grain and some against the grain what is the minimum bend radius for 5052-H32 aluminum sheet that has a thickness of .125 inches? I want to make sure that we have no cracks at all.
Thanks for your help.
I have several assemblies that never get mechanically attached to each other, but which comprise a system. Some of the assemblies are connected with data cables, but some are wireless. All together they make up a system. I need to create a drawing which calls out all of these assemblies, in...
Would chromate conversion coating per Mil-C-5541 work ok as a pretreatment for powdercoating on alum?
Would Phosphate coating per TT-C-490 work ok as a pretreatment on Cold rolled steel?
What about Zinc per ASTM-B633, would it work ok as a pretreatment for powdercoating on Cold rolled steel...
Is it O.K. to use #10 stn stl screws with stn stl nuts(not locknuts)? Would there be a problem with galling? Or would that just occur if the nut was a locknut?
Also, what is the rule regarding the mating of screws and nuts with different thread classes (class 2 vs. class 3)? I seem to...
I have been asked to review our companies new drafting standards manual. We use AutoCAD and generally use either B-size or D-size templates in AutoCAD to create the drawings. We always print out our hard copies as B-size prints. The guy writing the manual specified that text should be created at...
I am bolting a 1/4" thick bracket to a 1/16" thick chassis wall. The fastener will go thru a clearance hole in the chassis and there will be a nut on the inside of the chassis. I do not have room for any type of head on the fastener, so I was planning on using a set screw. The set screw would...
I am trying to bring an AutoCAD drawing into Word as a Visio file so that anyone can edit the drawing in Word by double clicking on it and haveing it open up in Word as a Visio file which is easily edited by most people. What are the "cook book" steps to go from AutoCAD to Visio and then into...
So far I have only used AutoCAD 2007 to draw in 2D. Now I need to draw some 3D cable layouts inside a chassis and was going to try and use the 3D feature, but don't know how to create the cables. I tried using 3D polyline but when I used PEDIT it did not allow me to change the dia of the...
I am looking for a method to support 80 RJ-58 or RJ-214 cables as they leave 10 different transition boards in the back side of a standard VME chassis. We plan to run the cables from the transition boards to the rear hinged panel of the chassis. The hinged panel will act as a patch panel...
For a grade 8 hex head bolt I believe the recommended preload is .90 x proof strength x bolt tensile area. If I torque it as to develop less than the recommended preload, will that have any effect on the overall external load carrying capacity of the bolt?
Shigley's text book states that the proof load of a bolt is roughly the same as the yield strength. Does anyone know what the proof load or yield strength would be for a typical 3/8" diameter, 300 series stainless steel hex head bolt, the kind you would buy at a hardware store. McMaster-Carr...
Is it O.K. to have a yellow zinc plated bolt with washer and nut, fastened to a very large plain carbon steel floor plate? Would it be better to use a stainless steel bolt? Would a silver colored zinc plating on the bolt be better? Does the yellow zinc and silver colored zinc offer the same...
What is the equation for calculating Burst Pressure of a 1/2" I.D. x 5/8" O.D. x 2.40" long piece of LEXAN, polycarbonate tubing? It is open on both ends. The yield strength is 9000 psi and the ultimate tensile strength is 10,000 psi. Room temp water is flowing thru it.
