I am looking for a certain type of washer, but I do not know what it is called. Our building has I-beam columns and between the columns there is cross-bracing. The cross bracing consists of tension only threaded rods. The threaded rods go through a punched hole in the I beams web and are...
My company has been asked to quote building some portable dust collectors, which we have never made. The customer wants us to quote providing the frame and tank. They are providing the blower. These are the specs that they would like to have:
1300 CFM
5 HP blower
24" diameter tank to house 3...
We have a customer that wants us to fabricate some racks to hold aluminum wheels. The wheels are passing through heat treatment on these racks. They pass through an ovem at 1050F for 2 1/2 hours. They then go through a water quench with the water at 90F. The racks are roughly 6'x8'x8'. The...
We recently designed a piece of equipment using A572 Gr 50 steel. During fabrication this material was substituted with CORTEN A588. Is there any downfalls to using this material over the A572?
Has anyone ever tried using a standard woodworking router for doing weld preparation? I have looked at some of the bevelers on the market and some of them just seem like overpriced routers. One of the bevelers that I found had a 1 hp motor and had the perfect depth of cut for what I was trying...
We are welding 3 rings together. One ring is a 1"x8" flat bar rolled the easy way to an 82 3/4" ID. The other two rings are 1"x5" flat bar rolled to a 82 3/4" OD. The rings are to be welding into a c channel shape with a full penetration single V-groove corner joint on each end of the 8"...
I am designing a platform and I want to use 3/16" floor plate for the decking. The platform will be an I beam structure with the decking welded down. What is a good span for the floor plate for "pedestrian comfort"? I checked a bar grating span chart and it states that there should be less...
My company is constructing large cylinders (6 to 8 ft in diameter and 35 to 40 ft long, built in 5 ft sections) for the sorting of aggregate. These drums are constructed of 3/8" A36 plate rolled into cylinders. On each end there built up welded sections (made of 3/4" plate) for the cylinder to...
Please name the top 5 reference manuals that no mechanical engineer should be without. I'm looking to expand my library, past my college textbooks, and I hate to spend $300 on a book, that I will never use. If you could, please describe what you like about each selection.
Thanks
Can anyone explain to me how an eddy current separator works to separate aluminum scrap from ferrous and plastic scrap? The separator that I have seen flings the aluminum off of a belt conveyor into a chute. From what I understand the head pulley on the conveyor has a permanent magnet inside...
Can anyone rate the different grades of abrasion resistant plate? Mainly I want to compare the service life of ar400 and ar500 plate. How much more life can I expect out of ar500 plate than the ar400? I priced them both and the ar500 was about 11% more. Can anyone comment on the use of...
Can anyone tell me how to calculate the HP (for an electric motor) required to startup and drive the system in the picture? I have tried it several differnet ways but I keep getting different results. The torsion springs are designed to be at equilibrium in the position shown (at the center of...
What is CQ steel? I believe that is stands for commercial quality, which leads me to my next question. What is commercial quality steel? We use a lot of A-36 steel plate, and I wanted to know if anyone could compare these different grades of steel for me. How does it compare in strength...
We recently installed a shaker feeder on a 48' dropdeck trailer for a customer of ours. This was done so that they can take the conveyor on the road and demonstrate the capabilities of their system. It was a decent idea in theory but not so great in practice. The motors on the conveyor have...
This is just a question out of curiosity. Does anyone know how gauges for sheet metal and wire are determine? Where did these measurements originate from? I know how the gauge of a shotgun is determined but I can't find any reference for the seemingly random metal thickness. Also where do...
We are in the process of repairing shelves that are used in a heat treatment area. The shelves are constructed of 1 1/2" square tubing and 3/4" to 1" round tubing. I would say that they range from 16 ga to 11 ga and they are all 304 SS. The shelves are used to hold aluminum rims and are run...
What type of weld preparation would you recommend for butt welding two 1" thick A36 plates that are 48" long, I am looking for full penetration. I am using flux cored 0.065 wire. What would be the minumum groove size and can I get away without preheating. As always I am limited on fabrication...
I need to design a bridge crane to be used at the company where I work. We are planning on adding two 5 ton cranes to ride on one structure on the outside of our shop. The bridge will be about 30 ft long and the support girders will be 75 ft long supported every 25 ft. I need a good resource...
I am attempting to construct a liner consisting of AR235 plate to line the the inside of a trommel conveyor that my company is building. For those that don't know a trommel conveyor is basically a large steel cylinder that is used to sort materials. The trommel is mounted on an incline and...
