Missing piece construction lifter

Super Major · Post by **Super Major** » Sun Mar 14, 2010 1:16 am

A few days ago I built a missing piece of the effort controlled, here are some photos:

I struggled a bit 'to measure the thread, but using the hard way, I did

Emiel · Post by **Emiel** » Sun Mar 14, 2010 9:31 am

Wow,

Thats really nice work.

Best regardss

Emiel

Dandy Dave · Post by **Dandy Dave** » Sun Mar 14, 2010 2:24 pm

Yes, a very nice job.

Nice to have machine tools. I have a Bridgeport Mill 9 x 42 with a J2 variable speed head. And also 2 Southbend lathes. One is a 16 inch swing X 12 foot bed capable of about 9 foot between centers. The other is a 13 inch swing with a 6 Foot bed, and will do about 42 inches between centers.

I use them often to produce parts made of unobtainium.

Dandy Dave!

Super Major · Post by **Super Major** » Sun Mar 14, 2010 6:08 pm

I unfortunately have only a small lathe and then the thread I had to do

, but apart from that, otherwise I have no problems (drill press, welders, presses, etc. ....)

henk · Post by **henk** » Sun Mar 14, 2010 7:12 pm

You did a fine job Super Major

Super Major · Post by **Super Major** » Sun Mar 14, 2010 11:42 pm

Thanks, even if the grinding has not been very fine, however you can improve

The most 'difficult was the thread that could not be measured, (I had to disassemble the lift) so I screwed a piece of aluminum in order to measure the thread diameter and pitch (with deadly force, I refer to this system)

Dandy Dave · Post by **Dandy Dave** » Mon Mar 15, 2010 12:18 pm

Super Major wrote:Thanks, even if the grinding has not been very fine, however you can improve
The most 'difficult was the thread that could not be measured, (I had to disassemble the lift) so I screwed a piece of aluminum in order to measure the thread diameter and pitch (with deadly force, I refer to this system)

Your method makes an old machinest Kringe.

... I take it that you have no thread gage's or inside micrometers. Was the thread standard, or metric. At least you got it done.

Dandy Dave!

Super Major · Post by **Super Major** » Mon Mar 15, 2010 12:32 pm

The thread is 3 / 4 "x 25 threads per inch, another problem was that on two lathes, there is this passage, passing from 24 to 26

The important thing is that he managed to do so, for the spring (I did not know the size) I used a spring a shock of a scooter

Dandy Dave · Post by **Dandy Dave** » Mon Mar 15, 2010 12:59 pm

Most of the time an odd and uncommon thread such as this will require a die. Standard pipe thread is another one. At 27 TPI, it cannot be cut on a standard lathe. Dandy Dave!