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Member postings for Johan Viljoen

Here is a list of all the postings Johan Viljoen has made in our forums. Click on a thread name to jump to the thread.

Thread: Flexispeed- Change Gears
07/02/2021 18:54:18

Hello all,

So, I’m busy getting all my "bits & pieces" together for my Flexispeed meteor-II lathe restoration project. I’m slowly making some progress sorting out the “Cross-Slide lead-screw” issue.

Next little challenge is,, understanding the “Change Gear” combinations available for the Flexispeed meteor-II lathe.

I have the following change gears:-

20 T (currently mounted on the spindle)

60 T (currently mounted on the input to the lead-screw)

25T, 30T, 40T, & 45T (gears mounted on the “gear stack&rdquo

Looking at other Flexispeed meteor-II lathe articles in the forums, it is clear to me I’m missing a fear gears.

Could anyone perhaps help with a “gear-change chart” for the Flexispeed meteor-II lathe please?

Thanks,

Johan

Thread: Flexispeed meteor-II lathe Cross-Slide / lead-screw specs.
22/01/2021 17:56:01
Posted by Andy Carlson on 20/01/2021 19:20:42:
Posted by Michael Gilligan on 20/01/2021 08:45:53:

(a) The difference would also be between 3/16” and #10 diameters ... small, but non-trivial

(b) May I ask : what ‘misfit’ do you see shown in a photo of a single item ?

A... yes, I was using bigger sizes where UNC and BSW have the same nominal size

B... I was assuming that the deformation of the end-most threads in the photo was showing the misfit. Maybe that wasn't right?

I dug out my drawing again. It was just done for my own amusement some time back and never intended for sharing... or even necessarily for me to remember the full detail later, but...

unc-bsw.jpg

Checking the dimensions again, this is for an 18 TPI thread with UNC in blue and Whit in green - the colours were less muddy until I exported to JPEG. This assumes zero tolerance (which is never the case). The male side is at the bottom. UNC chops off the peaks of both male and female threads as shown by the lines on the drawing.

After doing this I decided that trying to determine UNC-ness or BSW-ness of an unidentified thread by fitting it to a known nut or bolt was probably not going to be very informative with real world tolerances in play.

Hopefully the OP is making progress.

B... I was assuming that the deformation of the end-most threads in the photo was showing the misfit. Maybe that wasn't right? This is exactly the misfit.

Also, I've now tried the UNC#10 -24tpi, better but not 100%.

,, I'll keep at it. thanks for all the input so far

19/01/2021 20:14:24

Thanks Michael, that was easy enough

19/01/2021 20:13:39

img_8949.jpg

19/01/2021 20:06:35

Hello all, I'm busy restoring a Flexispeed meteor-II lathe. The Cross-Slide lead-screw is quite badly damaged.

And herewith starts my challenge. (I'm not very clued-up in the imperial sizes)

I've measured the OD of the lead-screw thread @ 0.188 with 24tpi. My best guess would be that this should give me a 3/16 - 24 BSW thread.

,,, I bought the taps & die. The tap fits perfectly into the Cross-Slide. But the die does not fit the "good" lead-screw at all. (however, the "good" lead-screw also fits the cross-slide perfectly)

"forcing the die onto the 1st 1 1/2 threads, I took a photo,,, definitely Not good.

(,,, not sure how to add the photos)

Any suggestions as to what's going on here most welcome. (I've used FEW taps & dies)

Thanks, Johan

Thread: New Member - Johan
19/01/2021 20:01:02

Hi Oldiron, I'm based in South Africa. Love engineering, old machines and engines.

19/01/2021 18:53:00

Hello to all, I'm a part time engineering enthusiast that loves to tinker with most machines. I own a Flexispeed Meteor II and Myford. Both in need of serious TLC. I would appreciate all the help and advice available out there. Thanks, Johan.

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