Extreme Screwcutting - Hughes Precision Engineering

Major diameter of thread is 114mm, minor diameter 88.5mm, form is trapezoidal with a 1" (25.4mm) pitch. Thread depth is 13mm. Material is cast bronze, about 25 kilo's and about a grand worth just in casting. Was shitting myself every time the tool entered the job (well at least on the first one, i made two).

Category:

Science & Technology

Tags:

• 17032009

[YoungJim409]

Any idea what the part is for?

[mervn1969]

@YoungJim409 , it's a jacking screw nut for lifting train bogeys

[joleenmorganjohn]

Reclocking a thread is a pain. Especialy with an internal thread. Hope you were able to pull a good buck from that job. I never thought HSS would give trouble in bronze. Is it a speical allow?

[mervn1969]

HSS would not even touch it, had to make a solid carbide tool for the job. Material is cast manganese bronze. Thanks for your comments!

[loadervid]

Nice work mervn1969. Sounded pretty sweet too. Looks like bronze, right? I was getting deja vu watching your vid. I used to do some similar looking stuff. Who was the customer, if you're allowed to say?

[mervn1969]

@loadervid Thanks, yep it was cast bronze and tough as nails, I initially tried a tool made from hss but it wouldn't touch it at all. Ended up making a solid carbide tool which did the trick. I have another video of an even bigger thread which will post soon! Sorry, can't divulge customer. Thanks for your comments!

[gaizka1140]

That,s what I do all the TIME . And it is not an extreme enginnering , it is somethihg normal in a workshop. It is bronze material , it is a metric thread , and well You,re not working correctly . It has vibrations and I am sure a bad finish in the thread . Hi from Monterrey , Mexico

[cocksparrows]

rather you than me pal, good job anyway

[spam1712]

suddenly i have the urge to stick my dick in it

[ydna2]

Interesting, I've never backed a cutter out like that before, did you not have enough clearance for the holder?

[iiikeman111]

Very impressive. Thanks for posting

[madaboutpix]

wow that is some expensive tooling! Great work love the video!

[simpleinseattle]

Great video. How much did that boring bar weigh? Wow!

[jkamping1]

I would have used a steady myself. U got lucky that it didnt drab or shift while cutting.

[cosast54]

nice work !

[capnjacksparrow1]

difficult in a lathe without a steady, although a few years ago i pulled off a 4 start trapezoidal on a horizontal borer think it was .750 deep and 2.5 inch pitch(for ease of mounting) in cast chromium for the sub sea industry