Making a PRECISION Machinist Jack || INHERITANCE MACHINING

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Welcome back to the manual machine shop! In this video I’ll be prototyping a machinist jack with a few unique design features. The original idea comes from a very nice follower who shared his idea with me and I’m excited to share it with you as it solves a lot of the common problems with typical screw jacks. As always I spent a little time at the drafting board engineering the design (mostly) based around the tooling I had available in the shop. The final design is made from A2 tool steel and one of the key features that sets it apart are the knurled clamping collars that replace the standard jamb nut designs. Additionally there is a 2 stage threaded mechanism that uses a very coarse multi start thread for quick adjustment. Then ultra fine threads for high resolution allowing for precisely setting the jack height to within one ten-thousandth of an inch. Most of the work was done on the metal lathe as well as the vertical milling machine, but I used my previously made rotary table chuck adapter to maintain my references as I bounced back and forth between the machines. And it worked flawlessly.

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TIMESTAMPS

0:00 Intro
1:00 Credit
2:15 D-Zyne
4:53 I'll Start in the Middle
5:43 Th-Th-Threads
8:37 Boring...
9:37 An Anvil (of sorts)
10:03 Changing Gears (no literally)
11:33 Foundations
12:52 A Special Treat
14:06 The Chuck Can Do What?
15:17 Tying Up Loose Ends
17:02 Base finishing
17:47 Again... And Again
18:40 Test Time!
19:13 Absolute Carnage
20:20 Review

FAQ
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