Lathe chuck indexing?

[Neil WyattModerator @neilwyatt]

What was the problem with 45 and a double detent?

Neil

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Neil Wyatt on 08/05/2015 22:49:23:

What was the problem with 45 and a double detent?

.

It isn't 56, or 60 [as per Bazyle's comment] so it's off-topic.

MichaelG.

[Michael HornerParticipant @michaelhorner54327]

Posted by Neil Wyatt on 08/05/2015 22:49:23:

What was the problem with 45 and a double detent?

Neil

Is the double dentent the same as a forked detent?

Cheers Michael

[JasonBModerator @jasonb]

Posted by Michael Gilligan on 08/05/2015 22:51:57:

Posted by Neil Wyatt on 08/05/2015 22:49:23:

What was the problem with 45 and a double detent?

.

It isn't 56, or 60 [as per Bazyle's comment] so it's off-topic.

MichaelG.

Double detent used with a 45T gives 90 possible positions, 90 is divisible by 18 so on topic

 

Edited By JasonB on 09/05/2015 08:18:25

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Michael Gilligan on 08/05/2015 22:51:57:

Posted by Neil Wyatt on 08/05/2015 22:49:23:

What was the problem with 45 and a double detent?

.

It isn't 56, or 60 [as per Bazyle's comment] so it's off-topic.

MichaelG.

.

For the sake of clarification:

i.e … it's off Bazyle's topic.

[the thread had already drifted from the OP's question]

MichaelG.

 

 

Edited By Michael Gilligan on 09/05/2015 08:55:38

[Ady1Participant @ady1]

Would this work?

40 into 360 is 9 and 18 into 360 is 20, so a common denominator

cut first spline(1), move 9 teeth forward(10) cut second spline

move 9 teeth forward(19) cut third spline

move 9 teeth forward (28) cut fourth spline

37-37 fifth spline 46-06 (46total,which is 06 on a 40 tooth gear)

55-15 64-24 73-33 82-02 91-11 100-20 109-29 118-38 127-07 136-16 145-25 154-34

 

18 splines cut with a 40 tooth gear

Magic!

editrobably not…

Edited By Ady1 on 09/05/2015 11:01:40

[Anonymous]

Posted by Clive Hartland on 08/05/2015 21:42:08:

Thanks for the ideas and it set me thinking and I realized I have a DRO's and a screen on the milling machine so making an index plate will be easy. Make the disc and then find the center and I can do any number of holes, simples.

Exactly! That's how I made this special dividing plate, 63 and 69 holes:

Andrew

[Anonymous]

Posted by Bazyle on 08/05/2015 22:32:55

56 & 60 suggested recently don't actually solve the OP's original requirement for 18

That's because it was suggested in reply to the query by Clive, not the OP.

Andrew

[Ady1Participant @ady1]

Neils double detente on page one looks useful.

It looks like you can do a direct division in one direction, rotate it 90 degrees and you can do a half division

Edited By Ady1 on 09/05/2015 11:17:41

[Anonymous]

Posted by Capstan Speaking on 08/05/2015 20:21:23:

Posted by Andrew Johnston on 08/05/2015 19:45:40:

I'd drill two sets of holes, one of 56 and one of 60.

Andrew

Ha ha, it's easy to spend someone else's time and labour

Andrew

[Clive HartlandParticipant @clivehartland94829]

Damn, now I will have to modify my Harold Hall dividing device with a pin/plunger and arm. That disc looks very good Andrew.

Clive

[Ed DuffnerParticipant @edduffner79357]

On Saturday I used some odd pieces of material to make up a small arm and mandrel to take an indexing plate from my rotary table. It's a bit crude but I have next to no stock and had to make do. It works ok and there is no backlash.

Ed.

 

 

Edited By Ed Duffner on 10/05/2015 22:05:44

[Neil WyattModerator @neilwyatt]

Posted by Michael Gilligan on 08/05/2015 22:51:57:

Posted by Neil Wyatt on 08/05/2015 22:49:23:

What was the problem with 45 and a double detent?

.

It isn't 56, or 60 [as per Bazyle's comment] so it's off-topic.

MichaelG.

He wants 18 divisions 45 x2=90 so every 2 1/2 teeth.

Simples.

Neil

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Neil Wyatt on 11/05/2015 08:47:48:

Posted by Michael Gilligan on 08/05/2015 22:51:57:

Posted by Neil Wyatt on 08/05/2015 22:49:23:

What was the problem with 45 and a double detent?

.

It isn't 56, or 60 [as per Bazyle's comment] so it's off-topic.

MichaelG.

He wants 18 divisions 45 x2=90 so every 2 1/2 teeth.

Simples.

Neil

.

Neil,

Yes I am perfectly aware that your system would work for the original question !!

What I was trying to say was that the thread had lready moved on [as they do] and your response was irrelevant to Bazyle's comment.

MichaelG.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Clive Hartland on 08/05/2015 18:23:56:

A question here, if I were to drill index holes in the back plate of my lathe chuck what are the preferred number of holes for general engineering use?

.

Neil, for info. ^^^

MichaelG.

[Brian OldfordParticipant @brianoldford70365]

I'm off to make a VDH

[Author]

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