My first build, and I need help!

[Kazzer]

My understanding is "Use a nut to lock the prop"

And you'd be absolutely correct! That's what he meant. He also said Loctite would be ok.

So, that's that problem solved!

[greenman407]

If you turn a wrench all day long, you can just look at a nut or bolt and you know that its a 9/16" and you grab the correct wrench without a further thought. To these people , the thought of going to a completely different measuring system makes them cringe, as if they dont already have enough problems as it is already. So its what ever you were taught, thats what you want to stay with. If you mess with peoples comfort zone, they wont be happy.

[10horsemclaren]

I work all day every day on steam engines built in the days when England was an empire and Victoria sat on the throne. The thought of using French nuts and bolts never enters my head. Whitworth is a perfect thread form for the job I do so I keep with it. That said I do come across engines that have thread forms no man but the guy that cut it understands and he's long gone to the ground.

[greenman407]

Wow! That sounds interesting. A dream job!

[He Who Shall Not Be Named]

The French!? .... I KNEW it!

David,

[10horsemclaren]

Gabriel Mouton, the vicar of St. Paul's Church in Lyons, France,was the founding father of the metric system. He based it on one minute of arc of the great circle of the earth. It works out as 1852 meters or one nautical mile. He then went on to use a pendulum with a swing frequency of one beat per second giving a travel of 25 CM.
So yes blame the French, infact blame them for most things its easy and feels good.

[beeryboats]

Holy Cow! Ask a simple question and get a two page thread hi-jack! I did find out it's a 5-40 thread and bought the proper die. I may take the parts to work tomorrow and thread the shafts on the press or lathe. We overhaul Diesel pumps and turbos and they run the range from metric and SAE fasteners. Usually they are so rusted on the turbos that they will hammer on the socket that fits the tightest and go from there.

[Albion]

Gabriel Mouton, the vicar of St. Paul's Church in Lyons, France,was the founding father of the metric system. He based it on one minute of arc of the great circle of the earth. It works out as 1852 meters or one nautical mile. He then went on to use a pendulum with a swing frequency of one beat per second giving a travel of 25 CM.
So yes blame the French, infact blame them for most things its easy and feels good.

Ahem

http://en.wikipedia.org/wiki/John_Wilkins

[trout]

Beeryboats,
Your timing is perfect on this thread because I am crossing the same step as far as attaching the props. This thread helped me get some answers.
Thank you!
Tom

[beeryboats]

Ok! The shafts are threaded just perfectly on the first try. They are 5-40 and the props turned on smooth as silk. I used the mini lathe at work ( wish I had one ) to hold the shaft just short of the end you want to thread. I did taper the end of the shaft a little. Then I used a box end wrench to hold the die. Using my thumb to press the die on the end of the shaft, I slowly turned the chuck head of the lathe by hand. Once I had a couple threads started I kept backing up the chuck head a half turn and then forward a 3/4 turn. A little lube would help, but the die was so small it was hard enough to hold on to.

The darn die was a little expensive. About $11 for the die and $15 for tax and shipping. And the little critter is about the size of your thumb nail! Tom, send me a PM if you would like to "borrow" it.

Jay

[Kazzer]

The French!? .... I KNEW it!

David,

OK! OK! We've had your rant about blacks and the French. Now what about Philippino's ? Eh Eh?

Where's our moderator, The Grim Sweeper? This thread needs a sweep through?

[Kazzer]

Ok! The shafts are threaded just perfectly on the first try. They are 5-40 and the props turned on smooth as silk. I used the mini lathe at work ( wish I had one ) to hold the shaft just short of the end you want to thread. I did taper the end of the shaft a little. Then I used a box end wrench to hold the die. Using my thumb to press the die on the end of the shaft, I slowly turned the chuck head of the lathe by hand. Once I had a couple threads started I kept backing up the chuck head a half turn and then forward a 3/4 turn. A little lube would help, but the die was so small it was hard enough to hold on to.

The darn die was a little expensive. About $11 for the die and $15 for tax and shipping. And the little critter is about the size of your thumb nail! Tom, send me a PM if you would like to "borrow" it.

Jay

see this

http://www.ehow.com/video_4951866_use-tap-die-set.html

[beeryboats]

Ha! Let's see him put threads on a long piece of 1/8" brass rod and not bend it at all!

[He Who Shall Not Be Named]

Wrap it it a towel, clamp it within a good quality Machinist's vice, and you're off to the races!

David,

[Kazzer]

Ha! Let's see him put threads on a long piece of 1/8" brass rod and not bend it at all!

Brass rod for a prop shaft? I don't think so.