Glenn

Show me your Improvised Cone and Other Mandrels

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Show me your improvised cone and other type mandrels

We are looking for inspiration and those items that get the job done 

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ConeMandrel1.jpg.f20eab810660259394da9cc03c13b2b4.jpg

 

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...

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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.

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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...

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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.

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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!")

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I think it goes on top of a flag pole? Price was right free and delivered too.

Surprisingly hard too!

taperpoint01.jpg

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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:

20160901_002451.jpg

When I finally acquire a milling machine, I will start out at R8 :)

Robert Taylor

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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. 

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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

IMG_0984.jpg

IMG_0987.jpg

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