Hemingway geared rotary table build

[steamer]

OK

Here's some photo's of the build thus far...






In this photo, the stub shaft is made, inserted and used as a mandrel to finish the OD turning and Grooving.

Should of had the blank cut longer.....but C.O.R.



Here's the nut turned and threaded .745-40.



The base blank......



After a trip to the saw



I am now squaring this block up in preperation for a trip to my lathe....and the table.....


Like I said....it's sitting.....I'll get to it.



Dave

[sco]

Well UPS let me down so still no replacement base to work on.  Instead I machined up the central pivot pin and the lock nut, here they are with the pad bolt.

Simon.

[sco]

UPS finally delivered the package - looks like they've been playing football with it in the meantime but the contents seem to have survived.

Whilst waiting for the replacement base I've made a start on the table - the supplied stock is quite generously sized so there is an awful lot of cast iron dust to create.

Simon.

[sco]

The major operations on the table are now done - just needs the T slots and the radial holes drilling.  I Loctited the central pin in whilst the table was in the lathe and then did a final facing skim to make sure it was all on the same plane - hopefully I wont regret bonding the pin in for subsequent machining ops!

Simon.

[sco]

Been working on the base - haven't completely followed the build instructions so that I could mount it on the faceplate with four bolts.  The table fits though so, so far so good.

Simon.

[Don1966]

Hi Simon, looks like it's finally starting to take shape. Nice work bud and I have been watching your progress. I have the non geared table to build and hopefully I can get some tips for doing mine.

Don

[sco]

Thanks Don,  the non-geared version is quite different though so not sure how much you will pick up.

Simon.

[sco]

Hogged out the back of the base to make the pocket for the gear - this allowed a trial assembly so I couldn't resist.  With a drop of oil it spins smooth as silk, next job is the worm spindle 

Simon.

[Don1966]

Cool Simon, they really look nice.........


  don

[steamer]

Nicely Done Simon!

Dave

[sco]

Spent the day making bits for the worm assembly - started with the main tube which has the central hole drilled slightly eccentric so that you can adjust the worm mesh.  Then drilled and reamed the brass bushes 1/4" to suit the supplied drill rod axle - all going too well!  I then checked the worm which is supposed to be supplied with an accurate bore to suit the 1/4" axle - nope bore was very rough and seemed more like 6.5mm - time for a rethink   

Had some 7mm drill rod handy so decided to re-bore the bushes to suit and gripping the worm very gently in the chuck bored it out to 7mm.  Turned out ok I think so got on and made the main nut, tomorrows job is the micrometer collar and the hand-wheel.

[sco]

Today I screw cut the end of the worm axle - no fancy clutches for me so lots of lathe on / off / reverse / on / off repeat.  Also machined up the micrometer collar - used a small 45deg dovetail cutter to machine the graduations.

Simon.

[sco]

Quick shot of the assembly so far post lapping the gears together.

Simon.

[Don1966]

Oh! I like that it's really taking shape and looking good.   

Don

[Kim]

Looking pretty cool Simon!
So what's the brass button in that left hand corner doing?  Does it hold the shaft in place?
Kim