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Update Hello all, just a quick update as to my shaft sealing problem. Currently we are using standard single lip radial shaft seals, fitted in the correct orientation so as to prevent the ingress of dirt. Seal size 90 x 60 x 10 The stuffing box is unchanged and after the first seal we have...

I have often seen machinery movers use steel plates (as others have suggested) and this method has been very successful. As you are at a quay can the frame not be loaded onto a barge and then offloaded when it is near to its new position? I have witnessed a machine being moved over a tamped...

I have added a screen print of the basic design. The seal (in red) only shows the primary lip.http://files.engineering.com/getfile.aspx?folder=d23cb312-db7f-4590-8f9d-892693ae41e2&file=Work_stuff.doc

Thank you all for your advice so far. I had to carry out a drive shaft replacement the other day so we decided to trial some of the ideas you have all offered so far. Currently we still have the same stuffing box and stainless steel ring fitted into the screw housing. However we now have a...

Thank you all for the information so far. It has given me plenty to think about. F.A.O. 1Gibson. No one has said we can't have lubrication it is just that the current design/setup does not allow us to get lubrication between the shaft and the gland packing once the screw is in service. I can...

I'm looking for some advice/ideas about how I can seal a drive shaft that turns a concrete delivery screw. At the moment the drive shaft is sealed by a gland packing material called Duramid (manufacturer James Walker). The drive shaft passes through a replaceable steel ring which fits through...

I used to work with machine tools and they are often used to securely hold tools in place. These tools could be subjected to 'tool changes' many hundreds of times per shift. This would constantly be putting the washers under stress/fatigue. In seven years I didn't have to replace a single one...

Thank you all for your advise. Having trawled the internet for information, seen the prices of the equipment and read your advise I have come to the same conclusion as SylvestreW and IRstuff. I have recommended to my boss that we seek professional help and have an independant company come in...

I've been tasked with investigating the noise levels in my workplace. This task has never been carried out and I have no experience of using sound measuring equipment. The workplace is a foundry and fettling shop based in the UK, so as you may imagine it can get very noisy. I have read the...

Thank you all for your help and advice. We didn't consider a vacuum test. However the test procedure was dictated to us by the customer so it was for this reason we pressure tested the castings. So far the test rig is proving successfull.

Thank you all for your responses. I like the idea of using the submerged test. However due to the size and weight of the casting and fixture I have no way of lowering the fixture into and out of a tank. (The guys on the shop floor would not be able to lift the test rig and casting safely by...

I was tasked with designing and manufacturing a test rig to be used to ensure that aluminium castings are not porous. The customer for these aluminium castings had been testing the castings previously, however we have now been tasked with carrying out the testing. The customers test procedure...

I'm using stock bar (cost reasons, i'm on a very tight budget). I have measured the bar at various points along its length and have found the bar to be between 44.96 and 45.00. For the application a stock bar is acceptable although I understand that there are potential issues relating to...

Hello fsincox, I've been in the profession 11 years, in a maintenance engineering role. So I haven't really had too much to do with the creation of 'correct' technical drawings and the standards associated with them. I'm starting/trying to drift away from maintenace and take a greater role in...

I hadn't taken the C11 into account when designing the part. I simply picked 45mm dia as that was the round bar size available and I don't have the ability to turn the shaft to the required size. (I'll now remember to match tolerances in future) I'll have to make do with making the sleeve dia...

Thanks for the info, jokes and link. I am UK based. The shaft is 45mm to 44.96mm dia. An H11 fit is stated to be 0 to +0.160mm. Therefore if on the drawing I state the tolerance to be 45.00 to 45.16 and the machinist cuts the bore at the lower end of the tolerance then I will end up with very...

I'm currently designing a parts catcher for a machine. Doing detailed design work is something relatively new to me so I'm unsure about drawing standards and dimensioning. I have a shaft that is 45mm in diameter. A 'sleeve' will slide over the shaft. I require a clearance fit (H11). According...

Hi, You may want to check out the following website: http://www.freestudy.co.uk/ Type in trigonometry into the search engine and it should take you to the relevant section.

Hi worldsteel, I can't answer your question unfortunately, but you may find someone who can in the structural engineers section/forum.

According to Corus (manufacturers of Hybox 355)the RHS is weldable. Ron: You are correct with regard to the welds being subject to sheer stress in the structure I have designed. There are no lateral loads acting on the side of the tube. Can anyone recommend me a good book about welding...