Glenn Posted February 1, 2018 Share Posted February 1, 2018 Machinery's Handbook Quote Link to comment Share on other sites More sharing options...
Gergely Posted February 1, 2018 Share Posted February 1, 2018 Awesome, thank you! Bests: Gergely Quote Link to comment Share on other sites More sharing options...
Dave51B Posted February 1, 2018 Share Posted February 1, 2018 Thanks Glen...... Now if only there was a chart to tell what size and length stock to start with..... Life is good Dave Quote Link to comment Share on other sites More sharing options...
Charles R. Stevens Posted February 1, 2018 Share Posted February 1, 2018 Extrapolate from the boss cross section, (a&duh flat jaws, a&d v neck) for flat jaws you can use flat stock but round or square are easier to deal with for drawing out. So approximately 3/8 square or 1/2” round for the smallest and an inche and a quarter square or an inch and 5/8 round. So looking at the 3 gauges of sucker rod in my stash I have 3 sizes of universal tongs to forge, 1/4”, 3/4” and 2”.... Quote Link to comment Share on other sites More sharing options...
swedefiddle Posted February 1, 2018 Share Posted February 1, 2018 Good Morning Dave, Now if only there was a chart to tell what size and length stock to start with..... Make one the size you want with Play-Doh, scrunch it up to the size of your material. somewhere around 7-8" for average Tongs. Neil Quote Link to comment Share on other sites More sharing options...
Glenn Posted February 1, 2018 Author Share Posted February 1, 2018 If the kid will not loan you the Play-Doh, use modeling clay from the craft store. Here it is under $5 for a block, and comes in several colors. Quote Link to comment Share on other sites More sharing options...
Dave51B Posted February 4, 2018 Share Posted February 4, 2018 On 2/1/2018 at 11:00 AM, swedefiddle said: Good Morning Dave, Now if only there was a chart to tell what size and length stock to start with..... Make one the size you want with Play-Doh, scrunch it up to the size of your material. somewhere around 7-8" for average Tongs. Neil awww......geeze.....All I was looking for was a free easy way out....Now I have to buy play doh......Extrapolate something....Pitter patter on something.....I don't know....I think somebody knows where the chart is, but they just want to see me work for it.......ha Dave Quote Link to comment Share on other sites More sharing options...
swedefiddle Posted February 6, 2018 Share Posted February 6, 2018 Good Morning, Poor Baby, Do I have to think once in a while, or twice in a short while???? Forget the long while, it turns into a "whine"!! Best to leave the wine for the cup and forget the other "whine"!! If there was a chart for "This dimension of material, makes this dimension Thongs", it would be in the Sewing Department. LOL We used to call Thongs, the things on our feet!! LOL I guess I am showing my age again, If I can remember that far back. LOL Neil Quote Link to comment Share on other sites More sharing options...
bluesman7 Posted February 6, 2018 Share Posted February 6, 2018 Nice charts Glenn. I have a copy of Machinery's Handbook. I don't think that I was ever aware that was in there. Quote Link to comment Share on other sites More sharing options...
Glenn Posted February 6, 2018 Author Share Posted February 6, 2018 They dropped much of the blacksmithing information from the Machinery's Handbook in the later editions. Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted February 6, 2018 Share Posted February 6, 2018 IIRC it was issue 13 that was the last to have the full smithing stuff. Quote Link to comment Share on other sites More sharing options...
robie1373 Posted July 16, 2018 Share Posted July 16, 2018 I think these came out of the art of blacksmithing. With this you could easily copy tongs you like. To calculate the weight per foot of steel bars Square - (Width in 1/8ths) * (thickness in 1/8ths) / 19 Round - (Width in 1/8ths) * (thickness in 1/8ths) / 24 To calculate the weight per inch of steel bar Square - (Width)*(Thickness)*2 / 7 Round - (Width)*(Thickness)*2 / 9 Quote Link to comment Share on other sites More sharing options...
Hefty Posted February 24, 2020 Share Posted February 24, 2020 Just returned to this sticky because I want to make some goose-neck tongs for hammer billets but there seems to be a discrepancy in the dimensions for the stock size/capacity I want to make them for. 1 1/2 - 1 3/4" stock/capacity, dimension B = 1" and D = 1 1/8 whereas all the other stock sizes suggest D should be smaller than B. If I've got my imperial correct in my head (sorry, we use metric down here), by comparing to the ones above and below it in the table, it looks like D should be 5/8". Do others get the same sort of number when they look at this? I'm just wanting to double check because these would be two of the main dimensions that I would use to determine my initial stock size to make them out of. Cheers, Jono. Quote Link to comment Share on other sites More sharing options...
wicon Posted February 25, 2020 Share Posted February 25, 2020 And B should be 1 1/8" Quote Link to comment Share on other sites More sharing options...
JHCC Posted February 25, 2020 Share Posted February 25, 2020 On 2/23/2020 at 8:37 PM, Hefty said: it looks like D should be 5/8". Yes, that looks like a typo. Keep in mind that this is a theoretical ideal, and if your stock is a bit off, the tong police won't be coming for you. Just try to keep it close and to make sure that the cross sectional area is as near as possible. Quote Link to comment Share on other sites More sharing options...
Judson Yaggy Posted February 25, 2020 Share Posted February 25, 2020 That tong chart is from over 100 years ago when tongs were being made from wrought iron. Largely irrelevant for modern makers who are using A 36 or 1045 or 4140... Even our modern basic grade of steel (A 36) is far stronger than wrought, so functional tongs can be made from much thinner cross sections. Quote Link to comment Share on other sites More sharing options...
Dave F Posted March 1, 2021 Share Posted March 1, 2021 You could estimate the volumes of the jaw, boss, and reins, and then divide by the cross sectional area of the stock to get the lengths (and the isolation lengths) For instance, the flat-jaw 3/16-5/16 has: Jaw Volume: D * C * F = 0.439in^3 Boss Volume: pi * H *(A/2)^2 = 0.138in^3 Rein Volume: L/3*(H*G + I*K + (H*G*I*K)**.5) = 1.855in^3 Total volume: 2.433in^3 ( * 0.284 lb/in3 gives 0.69lb per half-tong) The boss cross sectional area A*H=0.234in^2 is 93% of 1/2" square stock's 0.250in^2 cross section, so you can draw out the boss. For half a tong, you need 2.433/0.250=9.73", isolated into 0.439/0.250=1.76" for the jaw, 0.138/0.25=0.55" for the boss, and the 1.855/0.25=7.42 remainder for the rein. Double it up for the full tongs, and this design would weigh 1.4 lbs, and take 19-3/4" of 1/2" square stock. For the 2" capacity flat tongs, you need 13" of 1.5" square stock per 8.3# half-tong, isolating 4" for the jaw, and 2.7" for the boss. Quote Link to comment Share on other sites More sharing options...
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