View Full Version : Dividing tool

03-02-2011, 04:09 PM
Hi All

Been a long time, but finally I have finished a new project.

It is a dividing apparatus, that is the first step in my project of building a clock



Any commend is as allways welcome

03-02-2011, 04:18 PM
Looks good, did you drill the holes by hand or CNC?

03-02-2011, 04:23 PM
CNC - That's cheating isn't ?

The plate is drilled by hand in a rather special setup


03-02-2011, 04:30 PM
Real good looking plate you have there. Nice job, I really like the way you drilled the holes. Can't wait to see step 2

03-02-2011, 04:59 PM
I like how you sawed that split-block clamp - did you do that by hand ? Fine looking piece of work.

03-02-2011, 05:03 PM
The spilt block was made in the lathe by use of my milling attachment


The spilt arm was made with a junior hack saw


03-02-2011, 05:06 PM
I like the compound set up you have used there. Fine looking unit overall.

03-02-2011, 05:47 PM
How did you make the longitudinal cut, parallel to the length of the arm? ...thread a hacksaw blade through the hole to start the cut?

03-02-2011, 05:51 PM
The spilt arm was made with a junior hack saw

By hack saw? Is it possible at all?:eek: ;)

I got it! You read the recently published tip on how to use hacksaws (gold nuggets like "saw blade should be sharp" and "lubrication is helpful").

P.S. Very good craftsmanship! Thank you for sharing. Look forward to seeing Part 2 of the series.

03-02-2011, 08:26 PM
Very nice work!!!!! What did you use to blacken it???

J Harp
03-02-2011, 11:42 PM
Nice job. Would you describe how you used the gear train to index for drilling the holes?
I like the cross slide stop on your lathe too.

03-03-2011, 10:49 AM
Hi All


Any commend is as allways welcome

How did you produce that L slit?

03-03-2011, 11:12 AM
To make the L-slit I first thread a hacksaw blade in the hole and cut, next a cut from outside into the privious cut.

As for the gear train setup, I kindly ask you to study the photo, I'm sure this tells much more than my words will tell.

The tool is not blakened, but the stock piece of steel was painted black in its former life.

Thank you for all the kind comments

03-03-2011, 11:20 AM
very nice work looks real good!!!!!!! why seven rows of holes?

03-03-2011, 11:35 AM
With the 7 rows I can make the following divisions


03-03-2011, 11:53 AM
CNC - That's cheating isn't ?

The plate is drilled by hand in a rather special setup


So it looks like there's a plunger of some kind on the angle that's bolted to the table (Aluminum round on the left of the piece). That's how you index to the teeth of the gear I'm guessing. Then you can figure out your spacing based on the difference between the two gears, i.e. if you want x number of holes on the plate and gear one has y teeth and gear two has 2y teeth (or any other ratio), then I can get that number of holes by putting the plunger on every z tooth. It looks like the plunger is on the gear that is not meshing with the other one, so that gives you further opportunities to do partial turns of the gears. I imagine since you have two gears on each stack, you can flip them around to get different ratios? BTW, is the plate keyed in some way to keep it from turning?

03-03-2011, 12:04 PM
The plate is not keyed - should be - but I have tightnend is very hard, so I hope it will do.

If problems in future I plan some kind of lock pin.

Your explanation of the setup is very right, I did however use different gears for different set of holes, the shafts is made so they could be slided to and fro on the milling table

The Artful Bodger
03-03-2011, 03:06 PM
Very nice work and thank you for showing me the method of using gears to get the various divisions!:)

With regard to the explanation of how the gears work, if I understand correctly, the compounded gears on the right effectively multiply the number of teeth on the main gear. For example, suppose the main gear has 60 teeth and the compound gears are 40 and 48 teeth. 48/40=1.2 and multiply 6x1.2 =72.

03-03-2011, 04:03 PM
Yes ! This is the system exactly

Ian B
03-03-2011, 05:08 PM

Using the mill table's tee slot as a "banjo" for a train of dividing gears is extremely clever - I've never seen that done before.

On the method of clamping the blocks to the rods, instead of cutting splits, did you consider using a split cotter? It doesn't give the same contact area as the split method, but (I think) the block retains more strength. Just a thought.

Nice work!


03-03-2011, 05:39 PM
Yes ! This is the system exactly
great!!!!!!!!!!!!!!!!!!!!!! all i have to do now is figure it out . that should keep me busy for a while . lol thanks for the info

Lew Hartswick
03-03-2011, 07:43 PM
I agree that clamp block is " Elegant " . :-)