bornfree Posted April 9, 2018 Report Share Posted April 9, 2018 I used 4 x 30mm pins on my 30 ton press Quote Link to comment Share on other sites More sharing options...
amateur Posted April 9, 2018 Report Share Posted April 9, 2018 Mild steel, by definition, is not an engineering grade. If you do not know its composition you can only guess at what it might do under stress - not something that I would want to do. My tables on steel grades do not give a stress loading for mild steel. With a known grade of engineering steel with known compositions and a published stress level, you can calculate whether or not the stud will fail at the loadings that you are proposing. I would suggest that 20mm diameter of EN16 would easily cope with your loadings Quote Link to comment Share on other sites More sharing options...
la bala Posted April 9, 2018 Author Report Share Posted April 9, 2018 3 minutes ago, amateur said: Mild steel, by definition, is not an engineering grade. If you do not know its composition you can only guess at what it might do under stress - not something that I would want to do. My tables on steel grades do not give a stress loading for mild steel. With a known grade of engineering steel with known compositions and a published stress level, you can calculate whether or not the stud will fail at the loadings that you are proposing. I would suggest that 20mm diameter of EN16 would easily cope with your loadings Thanks for your help. will get some ordered. Quote Link to comment Share on other sites More sharing options...
la bala Posted April 9, 2018 Author Report Share Posted April 9, 2018 26 minutes ago, bornfree said: I used 4 x 30mm pins on my 30 ton press Quote Link to comment Share on other sites More sharing options...
amateur Posted April 9, 2018 Report Share Posted April 9, 2018 I did a bit more research on-line and found this, which sort of confirms my earlier thoughts, but specifically confirms that EN16 is shear resistant, but "gives" before breaking. http://www.m-machine-metals.co.uk/info_conversions.html Quote Link to comment Share on other sites More sharing options...
la bala Posted April 10, 2018 Author Report Share Posted April 10, 2018 Opened the holes on side frame to 20mm today. I decided to change the design a bit, things didnt quite look strong enough to be a 20 ton press. I have made the bottom adjustable table much stronger, I now have to think about beefing the top bar up as well, no point in having one end stronger than the other. All this beefing up and making stronger comes at a price, its getting mighty heavy already. I am already struggling to lift the bottom table and put the pins in at the same time This getting old aint much fun when the brain is still young. Tomorrow I intend to weld the frame up, at the moment it is only tacked, I am just hoping I dont tighten everything up so the adjustable table is no longer adjustable, but as always if I mess up I will tell. Quote Link to comment Share on other sites More sharing options...
ditchman Posted April 10, 2018 Report Share Posted April 10, 2018 put some wedges in before you fully weld it.....then you can knock em out when the welds are cold... Quote Link to comment Share on other sites More sharing options...
Big Mat Posted April 10, 2018 Report Share Posted April 10, 2018 I've got some nice En16 on my bench that would suit you nicely, customer might complain if i chopped abit off though especially as it's precision ground stuff! Quote Link to comment Share on other sites More sharing options...
bornfree Posted April 10, 2018 Report Share Posted April 10, 2018 pictures as promised Quote Link to comment Share on other sites More sharing options...
la bala Posted April 10, 2018 Author Report Share Posted April 10, 2018 7 minutes ago, Big Mat said: I've got some nice En16 on my bench that would suit you nicely, customer might complain if i chopped abit off though especially as it's precision ground stuff! If its 20mm Dia I sure he wouldnt miss 2 off at 200mm Thats a serious bit of kit bornfree there is some meat in that. I rather like that little lathe in one of the pics. Thanks for sharing, most interesting. Quote Link to comment Share on other sites More sharing options...
la bala Posted April 10, 2018 Author Report Share Posted April 10, 2018 If thats a 30 tonner bornfree, I think i will call mine a 10 tonner Quote Link to comment Share on other sites More sharing options...
bornfree Posted April 10, 2018 Report Share Posted April 10, 2018 8 minutes ago, la bala said: If thats a 30 tonner bornfree, I think i will call mine a 10 tonner Yes I think I slightly over engineered it? Quote Link to comment Share on other sites More sharing options...
Big Mat Posted April 10, 2018 Report Share Posted April 10, 2018 31 minutes ago, la bala said: If its 20mm Dia I sure he wouldnt miss 2 off at 200mm Thats a serious bit of kit bornfree there is some meat in that. I rather like that little lathe in one of the pics. Thanks for sharing, most interesting. There will only be any spares if I mess up the programming in the morning Quote Link to comment Share on other sites More sharing options...
la bala Posted April 10, 2018 Author Report Share Posted April 10, 2018 Have a bad day Quote Link to comment Share on other sites More sharing options...
la bala Posted April 12, 2018 Author Report Share Posted April 12, 2018 Return springs came today so been knocking a press bar up. Quote Link to comment Share on other sites More sharing options...
ditchman Posted April 12, 2018 Report Share Posted April 12, 2018 quick question.................what are you making a press for.....have you got something in mind ? Quote Link to comment Share on other sites More sharing options...
panoma1 Posted April 12, 2018 Report Share Posted April 12, 2018 Maybe good for bulking horn? Quote Link to comment Share on other sites More sharing options...
ditchman Posted April 12, 2018 Report Share Posted April 12, 2018 27 minutes ago, panoma1 said: Maybe good for bulking horn? eh ! Quote Link to comment Share on other sites More sharing options...
la bala Posted April 12, 2018 Author Report Share Posted April 12, 2018 42 minutes ago, ditchman said: quick question.................what are you making a press for.....have you got something in mind ? Well its like this ditchman, I would much prefer sitting in the LR with the 452 on the rest, With the Mrs being poorly over the last twelve months i havnt managed to get out much, not that I would settle very long if i was out. Of late after helping out with the household chores and shopping, I have found myself more and more on this laptop. Last week I decided i was turning into a couch potato, I decided i needed a project, something to do other than what i was doing, and something to get the brain working. I will probably never use the press but have those in the family who will give it a good home. I tell you what ditchman after looking at the press that bornfree put on here, it makes my effort look as though its came out of a christmas cracker. Quote Link to comment Share on other sites More sharing options...
panoma1 Posted April 12, 2018 Report Share Posted April 12, 2018 7 minutes ago, ditchman said: eh ! Squeezing (bulking) rams horn in formers using a press, after prolonged boiling (to make it pliable) ........Rams horn is hollow so needs to be squeezed solid in order to work it, and shape it into a rams horn thumb stick. Quote Link to comment Share on other sites More sharing options...
ditchman Posted April 12, 2018 Report Share Posted April 12, 2018 know how you feel....felt exactly the same when i invented and made my intergalactic space ship engine...just got board one day and decieded to make one "just for the craec"..(where the klingons do dwell) mind you ...to quote a previous communicate.........................."thats a mighty fine tool you have there" Quote Link to comment Share on other sites More sharing options...
Big Mat Posted April 12, 2018 Report Share Posted April 12, 2018 You'll hate me for this la bala, but i chucked a 430mm long bit of en16, 21.845mm thick in the scrap skip, completely forgot! Quote Link to comment Share on other sites More sharing options...
la bala Posted April 12, 2018 Author Report Share Posted April 12, 2018 9 minutes ago, Big Mat said: You'll hate me for this la bala, but i chucked a 430mm long bit of en16, 21.845mm thick in the scrap skip, completely forgot! Great fellah that Big Mat , No worries I havnt got a 21.845 drill bit anyway Quote Link to comment Share on other sites More sharing options...
Big Mat Posted April 12, 2018 Report Share Posted April 12, 2018 6 minutes ago, la bala said: Great fellah that Big Mat , No worries I havnt got a 21.845 drill bit anyway It only occured to me as I tipped my swarf bin into the scrap skip, it's probably in porters yard somewhere now! Quote Link to comment Share on other sites More sharing options...
la bala Posted April 13, 2018 Author Report Share Posted April 13, 2018 Got a bit more done today, seam welded everything together, it did tighten the adjustable table a wee bit but a whack up and down with the 7 pounder sorted it. Collected some EN bar for table pins, and a piece of 35mm diameter for press main pin. I welded the press pin in and put everything together, stood back and thought this is going well. Yer Ok . Now any of you on here who are in later years will know, some of us oldies do from time to time lack a bit of concentration. Before I go any further I must tell you, I had plans and intentions of beefing up the top of the press main frame, in fact the 12mm plate was lying on the floor ready to make some big gussets. This was the next job after lunch. Getting back in the workshop after lunch, I stood there having a rollup and admiring my press, this is where it started to go mammories up . I stood back and thought i will give it a little test run. On my bench i had got a big old lump of brass with a pin going through it which was also brass, this had been in the ground many years and i thought it would be a good test. The pin measured just over 8mm so obviously an imperial measurement, well after bending a couple of short 8mm bolts I tried a short stainless one, so off we go pumping the press. This is better, this bolt isnt bending, gave it a couple of more pumps, surely it will go in a minute. Yes, I can hear you all saying, he hasnt finished the top frame.. Tell you what boys this getting old aint much fun. But like of have said before, if i am doing a project I will always tell you if i make a monumental c@ckup. Quote Link to comment Share on other sites More sharing options...
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