Diresta Bandsaw Restoration 19: Machining a Special Nut with Left Hand Internal Threads

I appreciate the honesty when things don't go right...

Buggy axles are made with left hand threads on one side for the same reason. It has been a lot of years since I took one apart, but if I remember correctly it is the left hand side that has left hand threads, right side having right hand threads, so that the wheels are always tightening the nut as you drive. Later buggies have Timken cone bearings and a castle nut and cotter pin, but early ones used those left hand threads. I overtightened one trying to get it off myself. Fortunately, we were reboxing the wheels and welding on new axle arms anyway. Thank you so much for the views over your shoulder. Finally I understand what you are talking about when you say you are waiting for the number to come around. I hope you do more of those views. I feel like I learned a lot this time.

Great video Keith. Here in the UK we mark aa left hand thread nut by using a threading tool to score the centre of the nut in the middle of the corners. That way people don't make the same mistake you did trying to take it off. These are found on ALL our gas bottles so you can't mix oxy/acet lines on the bottles.

Such nice over-the-shoulder views! Thanks, Keith, it's almost like we're standing at the lathe with you.

favorite steel surgeon

I trained as a machinist back in the middle 70’s. I still miss working with metal. I enjoy watching you work.

I have to say, Keith, your videos are just a great pleasure to watch ! Thank you 🙏

nice job on the re-due work one piece to the puzzle behind you now

KEITH, GREAT JOB, PET CATS AND DOGS, SEE YOU ALL NEXT TIME...

Time to pull the letter stamp set out of the drawer and give that nut and shaft end matching "LH" tattoos. Future Keith Rucker the Third will thank you.

You have such a huge amount of knowledge about sooo many things. You do a fantastic job explaining things throughly as well as all the great many camera perspectives. Even the smallest of details you show us. Also when you have a mis-hap you leave it in the production and explain why.... while showing us that it happens to the best of them. As well as you convey a good attitude. I like how genuine and real you come across in the videos. Thank you for ALL you teach us... and inspire.

Not the first to be tricked by an LH thread on the other end of the shaft and to go 'Doh!', and won't be the last either :) It happens, we are human and no shame in that, and at least we get to see another installment of rejuvenation fun :)

I never get bored of watching you do threading. I cannot tell you how mutch your videos have helped me as I am just job shop/mechanic in middle of nowhere and I don't get to practice as often as I need 😀

Hiya Keith

Seeing threads being cut is so satisfying and soothing. Nice job as always.

Thank you for sharing.👍👀

Have you considered engraving “left hand thread” into the face of the nut to help out the next guy that needs to pull it off?

I've done a bunch of right hand single point threading, but never any left hand. Thanks for the detailed tutorial.

I used to make LH and RH Coiling mandrel and the Nut that went with. All different sizes imperial/Micky Metric. Fitment had to go nice because u could adjust the lean angle of the wire ..repeatedly, sooo. On a Torrington Spring winder.

Thank You !