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Clocknut
04-01-2010, 10:15 PM
For my sins my interests are Clockmaking and my Rover P5b with me since 1973, I am trying to get my head around which way to build a Stepping Divider for either my Myford S7 or my Schaublin 102N.

John.

irving2008
05-01-2010, 12:07 AM
Welcome John

Would you like to say a bit more about your need...

Clocknut
05-01-2010, 08:28 AM
Thanks for the reply I would like to cut my own wheels so my dilema is either to index the lathe head with a milling spindle on the Schaublin very expensive! I have changed the bearings in the Schaublin head to Ceramic 15 degree AC and they willl do 22k (not that I want to do that rpm) and build as normal on the cross slide or build from scratch using ????

John.

irving2008
05-01-2010, 08:35 AM
Well I am building a stepper drive for my rotary table to do the same thing on my mill..

I'd suggest a small motorised 3" rotary table bolted to your x-slide so that the lathe spindle is used to cut. A gear cutter in the spindle and the wheel on an arbor driven by the rotary table would be my approach. You could of course skip the rotary bable and build a directly driven indexing arbor from scratch, it wouldnt be hard to do. You could still use the software/hardware solution in this thread (http://www.mycncuk.com/forums/showthread.php?150-CNC-Rotary-table-lathe-head-indexing&highlight=rotary+table)


Thanks for the reply I would like to cut my own wheels so my dilema is either to index the lathe head with a milling spindle on the Schaublin very expensive! I have changed the bearings in the Schaublin head to Ceramic 15 degree AC and they willl do 22k (not that I want to do that rpm) and build as normal on the cross slide or build from scratch using ????

John.

Clocknut
05-01-2010, 10:16 PM
Can you recommend a good table? the ones I have seen so far have not been good build quality!

John.

irving2008
05-01-2010, 10:25 PM
I bought a Soba 4" from Chronos (the one with 3 Tslots and an MT2 taper in the middle), about 60 in their Xmas offer. It got about 20minutes of backlash but is easy to mount a stepper motor onto... I'll be doing a build log on it soon...

ptjw7uk
05-01-2010, 11:28 PM
Hi Irving2008,
I've motorised one of those and had great problems fitting thrust bearings. Unfortunatley I never took any pics or did any drawings all done on the fly ordering what I thought I neede ... so got lots of extra bits bearing wise.
I think I should have got one from Arc euro as John S has motorised them and they look easier.

Peter

irving2008
05-01-2010, 11:35 PM
Peter,

This is the new design (I am told), they've been advertising them for a couple of months, its the Soba version of a Vertex. Mounting a stepper will be very easy, I've already stripped it down to measure up and theres no problem I can see unless I'm being very stupid.

ptjw7uk
05-01-2010, 11:59 PM
Hi Irving
Had a quick look on chronus - it certainly looks different to the one I got.
Are you going to fit thrust bearings or rely on as is.

peter

Just had another look and they are still doing my one SOBA 4" Rotary Table HV4 Type I wasnt that impressed as to quality etc

irving2008
06-01-2010, 12:24 AM
fit a single thrust bearing where the handle fits on the shaft...

lets not hijack John's thread any further... I'll start a new thread (http://www.mycncuk.com/forums/showthread.php?1598-Rotary-Table-CNCing)shortly with some pics I have just taken...

Clocknut
06-01-2010, 08:02 AM
Hijack away it's all very relevant and could save me loads of grief!
A bit off subject but I want to fit a bearing and thrust washers and cage bearing to my Myford S7 PCF but 9/16" seems to be an awkward size!
Thanks for all the help I have my head around the Electronic side it's just the mechanical aproach?

John.

irving2008
06-01-2010, 08:22 AM
Deleted the double post for you John...

Simply Bearings have needle thrust washers in 9/16 (14.28mm) sizes (http://simplybearings.co.uk/shop/index.php?cPath=3_8)

Clocknut
06-01-2010, 11:12 PM
Thanks for the info I will do an order I can't understand whay the washers are more money than the thrust bearings?

John.