Glenn Posted September 3, 2017 Share Posted September 3, 2017 Show me your improvised cone and other type mandrels We are looking for inspiration and those items that get the job done Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted September 3, 2017 Share Posted September 3, 2017 Top to bottom: Part of a large water valve insert from a wire rope fitting (I believe; other suggestions?) bolt/nuts so it can be held in a postvise. Test sample. (from Quad-State one year) Structural steel pin& wrench, the wrench end was forge welded to fit a hardy hole and bent 90 for ring work bull pin (I have one with a hardy stem welded on but it's at the other house---I hope) More when I get a chance to visit my shop... Quote Link to comment Share on other sites More sharing options...
marcusb Posted September 3, 2017 Share Posted September 3, 2017 If I ever get my big hammer set I plan on forging one Quote Link to comment Share on other sites More sharing options...
Frosty Posted September 3, 2017 Share Posted September 3, 2017 On the rare occasions I actually need a true ring I make a jig. For one or two I cut it from plywood for enough to burn the plywood beyond useful I torch one. The same circle cutter works for my saber saw as does for my torch. Not a mandrel cone and I've only ever worked where there was one in the shop and we didn't use it. I wish I'd asked but . . . Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted September 3, 2017 Share Posted September 3, 2017 I like a cone as I can get close to the right shape and then forge weld the ends (lapping them) and then heat and drop on the cone and true it up. Making some of the spiders used for cooking in Scappi's Opera becomes simple---now to make some of the oval ones....wish I had an oval mandrel much bigger than my bracelet one... Quote Link to comment Share on other sites More sharing options...
Frosty Posted September 3, 2017 Share Posted September 3, 2017 Tip the ring on a cone and it's elliptical, reverse and true it's oval. Just because I've never used a mandrel cone doesn't mean I don't know about conic sections. Well, okay I read a LOT of sci fi and the best is written by scientists. I don't recall the author, Heinlein maybe probably described orbits in terms you don't have to be good at math to understand or figure. Tipping a ring on a cylinder is an easier way to form an oval but a cone is more versatile size wise. Nobody go saying Frosty thinks there's such a thing as an oval orbit! I brought it up to describe part of the process. Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted September 4, 2017 Share Posted September 4, 2017 perihelion the thought! Quote Link to comment Share on other sites More sharing options...
JHCC Posted September 4, 2017 Share Posted September 4, 2017 Don't be hyperbolic. Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted September 4, 2017 Share Posted September 4, 2017 But hyperbole is the linguine francisca of the World Wide Web World! (Yes I can almost hear you quoting the Goon Show: "You silly twisted lad!") Quote Link to comment Share on other sites More sharing options...
Anachronist58 Posted October 9, 2017 Share Posted October 9, 2017 (edited) Under Development. Robert Taylor Edited October 9, 2017 by Anachronist58 addendum Quote Link to comment Share on other sites More sharing options...
oldgoaly Posted March 10, 2018 Share Posted March 10, 2018 I think it goes on top of a flag pole? Price was right free and delivered too. Surprisingly hard too! Quote Link to comment Share on other sites More sharing options...
Jackdawg Posted March 10, 2018 Share Posted March 10, 2018 A few of my favourite things Quote Link to comment Share on other sites More sharing options...
BIGGUNDOCTOR Posted March 11, 2018 Share Posted March 11, 2018 Anachronist58, #50 milling machine taper? 3.5" per foot. Do you have the mill that goes into? Quote Link to comment Share on other sites More sharing options...
Anachronist58 Posted March 11, 2018 Share Posted March 11, 2018 Yes it's a scrap CAT 50 taper, and no, but here is the tower casting for one of our Mazak 1850's being assembled: When I finally acquire a milling machine, I will start out at R8 Robert Taylor Quote Link to comment Share on other sites More sharing options...
BIGGUNDOCTOR Posted March 12, 2018 Share Posted March 12, 2018 R8 is very common, but there are some nice #40 mills out there like some Gortons, and I believe Index made a #40 spindle too. Quote Link to comment Share on other sites More sharing options...
Reeltree Posted March 13, 2018 Share Posted March 13, 2018 These help at times Quote Link to comment Share on other sites More sharing options...
oldgoaly Posted November 19, 2019 Share Posted November 19, 2019 From a counter sinker for rivets. about 12+" long 2" at top about 4.5" at base has a 90* mounting base, now to rig that up Quote Link to comment Share on other sites More sharing options...
LaneSiders Posted November 26, 2020 Share Posted November 26, 2020 So, I just found this in the scrap bin at work. Some sort of CNC mill fixture with an endmill broken off at the base of the smaller side. I think I can either grind some flats into that side or hammer it square to fit into a hardy hole and have a very fancy mandrel! Quote Link to comment Share on other sites More sharing options...
Anachronist58 Posted November 26, 2020 Share Posted November 26, 2020 Hello LaneSiders, could you post a pic of the broken tool end? It looks like a shrinker.... Robert Taylor Quote Link to comment Share on other sites More sharing options...
LaneSiders Posted November 27, 2020 Share Posted November 27, 2020 Actually, now that you say that I realize that's exactly what it is. I work in CNC machining but I am a "lathe guy" so I know about mills only from what I pick up by osmosis. And now that I looked back I see you have a very similar item. So thank you for giving me the idea to place the locking grooves into the vise. Quote Link to comment Share on other sites More sharing options...
JHCC Posted November 27, 2020 Share Posted November 27, 2020 I see you quenched it in the blood of your enemies. Quote Link to comment Share on other sites More sharing options...
Steve Sells Posted November 27, 2020 Share Posted November 27, 2020 turns people off when he quenches in the blood of his friends Quote Link to comment Share on other sites More sharing options...
JHCC Posted November 27, 2020 Share Posted November 27, 2020 Good point. Quote Link to comment Share on other sites More sharing options...
Glenn Posted November 27, 2020 Author Share Posted November 27, 2020 Word gets out when he quenches it in the blood of his enemies. Turns the enemies off too. Quote Link to comment Share on other sites More sharing options...
Anachronist58 Posted November 27, 2020 Share Posted November 27, 2020 5 hours ago, LaneSiders said: that's exactly what it is. There is more bonus consideration to be had. First, if you can see the butt end of the broken tool from the threaded end, you are in luck. If you can not, you may still be in luck. These Shrinkers are designed to be thermal cycled thousands of times... Bring the xxxxxx end to a low red heat, and the carbide may either fall out, or be drifted out. Be sure that the heat travels the length of the broken stub. Now you have a piece of 1" dia tungsten carbide with excellent hot working properties, as a fuller, for example. Shrinkers are coolant quenched in many systems, so the carbide is quench-tolerant at those lower temperatures.... These things are made from 8xxx and 9xxx alloys, amongst others... use a junk file first, as the case can be wicked hard. I think I will break out the big abrasive saw, and report back... You have two cone mandrels for the price of one (flip flip)! Robert Taylor Quote Link to comment Share on other sites More sharing options...
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