Hatz Biplane Association

Don't you just love it when the plan comes together?

Worked like a charm!

Turned the chuck by hand and used a new tap with plenty of oil.

Thanks for the tips guys.
Build on.

When I use the lathe I turn the turret by hand, I don't have the guts or coordination to do it powered.

Thanks for the suggestion. I'll give it a try.

I would tap them before welding and then chase them. Using the lathe would be the best since you will be assured that they are straight.

Do it in the lathe and chase the threads after you weld them.

Jeff Moore

Well, these took more time than I expected, but I have a full set now!

[attachment=0]DSC_0012 (1).jpg[/attachment]

I hope I counted correctly!

I figured since I have to hand-tap them, I'll do it after they are welded to the tubes.
Any tips on tapping will be appreciated!

(continued)
Step 5: Test for fit
[attachment=1]DSC_0048.jpg[/attachment]

Step 6: Cut off the other end
[attachment=0]DSC_0049.jpg[/attachment]

Repeat as many times as needed.
Not done yet: Tapping the hole.

I am starting to get the hang of the lathe, still probably doing many things wrong, but I am now turning the threaded tube endings.
I figured I'd share the joy....

Step 1: Chop a piece off your 4130 rod.
[attachment=4]DSC_0040.jpg[/attachment]

Step 2: Square the end.
[attachment=3]DSC_0043.jpg[/attachment]

Step 3.a: Drill the hole for the tap (size I I think).
[attachment=2]DSC_0045.jpg[/attachment]

Step 3.b: Drill the large hole (To reduce mass for the rosette weld).
[attachment=1]DSC_0046.jpg[/attachment]

Step 4: Reduce the radius of the outer dimension.
[attachment=0]DSC_0047.jpg[/attachment]

(continued on next post)

Nice work doc! My cousin has an Atlas lathe, he loves that bugger!