[Project 2] Machinist Jacks

[Project 2] Machinist Jacks

This topic has 10 replies, 6 voices, and was last updated 26 May 2020 at 09:52 by Lee Jones 6.

Viewing 11 posts - 1 through 11 (of 11 total)

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25 May 2020 at 17:10 #474848
Lee Jones 6
Participant
@leejones6
First project I get to choose (after being forced to make a part for the screwcutting gearbox).

Outside thread for the top (jacking) part (m30 x 2mm):

Inside thread for the bottom part:

Finished article:
Advert

25 May 2020 at 17:10 #31302
Lee Jones 6
Participant
@leejones6
25 May 2020 at 17:59 #474858
Lee Rogers
Participant
@leerogers95060
Nice one. Some jacks have been on my list for a while now , I will get round to it.
25 May 2020 at 19:15 #474874
John Baron
Participant
@johnbaron31275
Hi Lee,

I'll bet you didn't single point that internal thread
25 May 2020 at 19:20 #474876
John Haine
Participant
@johnhaine32865
Cheating I know but this seems to me to be the best approach.
25 May 2020 at 19:28 #474879
JasonB
Moderator
@jasonb
That's what I tend to do just grab a couple of nuts and a stud from the hold down set.

Lee with all your vibration problems you may want to add a locknut
25 May 2020 at 19:35 #474883
Lee Jones 6
Participant
@leejones6
Posted by John Baron on 25/05/2020 19:15:08:

Hi Lee,

I'll bet you didn't single point that internal thread

Well my tap & die set tops out at M24, so I guess I did.
25 May 2020 at 19:41 #474886
Lee Jones 6
Participant
@leejones6
Posted by JasonB on 25/05/2020 19:28:33:

That's what I tend to do just grab a couple of nuts and a stud from the hold down set.

Lee with all your vibration problems you may want to add a locknut

Cheeky! I'm trying to get to the bottom of those.

And yes, totally cheating (and would void the point of the project).
25 May 2020 at 19:54 #474894
John Baron
Participant
@johnbaron31275
Posted by Lee Jones 6 on 25/05/2020 19:35:50:

Posted by John Baron on 25/05/2020 19:15:08:

Hi Lee,

I'll bet you didn't single point that internal thread

Well my tap & die set tops out at M24, so I guess I did.

Good for you ! I hoped that you had. Its not an easy skill internal threading, particularly small or deep bores. Although I admit that I could have cheated and used a tap, the amount of effort required to turn a large tap of that size is enormous. I've only ever used that tap once, never again.
25 May 2020 at 20:22 #474910
not done it yet
Participant
@notdoneityet
Lee,

Wow. You certainly don’t do things by halves! They are generally supports – not used for jacking up the leaning tower of Pisa! I’m surprised you didn’t put a hole through the top, for a tommy bar.🙂

Good work, mind. Easier to practise on a larger internal thread.
26 May 2020 at 09:52 #475021
Lee Jones 6
Participant
@leejones6
A tommy bar, now there's an idea! Wait for v2.
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