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View Full Version : Shop made indexer-dividing head Bernie asked for



irnsrgn
02-28-2004, 01:28 AM
bernie, here are the pics you wanted to see.
I was given these too big fabricated angle blocks. I drilled and tapped them 3/8-16 for use as set up and holding fixtures. I drilled and tapped the top edges too. Then my mind saw something to add to them, this turned out to be an indexer and tailstock bolted to the top of the angle blocks. Next came a steady rest for a long shaft I couldn't get between centers.

http://img27.photobucket.com/albums/v81/irnsrgn/indexer_01.jpg

The next addition was another spindle so a 3 Jaw chuck could be used. shown laying in front of the head stock end.

http://img27.photobucket.com/albums/v81/irnsrgn/indexer_02.jpg

One thing led to another and I needed to cut some gear teeth for a gear for the 9 inch SB that broke out and I brazed the area back in and needed to recut the teeth, I had the right cutter from a box of parts I had purchased at an action. So a dividing head was the next step.

http://img27.photobucket.com/albums/v81/irnsrgn/dividing_head_01.jpg

I measured the teeth in the broken gear with a thread gauge and turned the worm on the big lathe, and the gear in the bridgeport with a borrowed dividing head. the plates were also made using the borrowed dividing head. To use I remove the indexing plate install the gear and worm and bolt the plate to the side of the angle plate, there is a little shield to protect the gear from chips and the tranformation is complete.

http://img27.photobucket.com/albums/v81/irnsrgn/dividing_head_02.jpg

this was a challenge for me as I am a self taught machinist and had never cut gears before, but it worked to do the job.

irnsrgn



[This message has been edited by irnsrgn (edited 02-28-2004).]

jfsmith
02-28-2004, 02:53 AM
Do you have any plans on paper for this? I would like to try and build these.

Thanks,

Jerry

Michael Az
02-28-2004, 02:56 AM
Nice work!
Michael

G.A. Ewen
02-28-2004, 03:06 AM
Excellent!!! Thanks for posting these pics.

John Stevenson
02-28-2004, 08:52 AM
Really smart as they double up as far maore than just a set of index centres.
It pays to ask around and have a good think before starting on a project such as this as it's supprising just what can be built into a design.
A standard set of centres like the generic 5C indexers being sold now days have far less value in terms of use than these in the pictures above.

I made a set many years ago when I was into doing casting. I cast a pair of identical angle plates up that could double as an indexer, dividing head, angle plates and also mount horizontally or vertically.
I also made the spindle nose the same as my Myford lathe at the time so I could swap chucks between the two items without loosing settings.
The hardened bushes in the top lined up with 4, 5 or 6 holes in the spindle for quick indexing like squares, hexagons, tap fluting etc.
The small brass button in the base of the main casting is the small index pin screwed in for safe keeping.
The tailstock barrel was just a length of siver steel or drill rod with a course groove screwcut into it to wind forward, against an location pin, to support the work.
This seems quick and simple to me.
Both ends were also bored No 2 morse.
I sold these a while ago as I moved up in size of equipment and this is the only picture I have of the set.
http://homepage.ntlworld.com/stevenson.engineers/lsteve/files/indexer.jpg

John S.

bernie
02-28-2004, 10:54 AM
Good Job!!! Looks like something all of us could use. Thanks for posting so quickly. Now I just have to get a dividing head!

4lb.Nevada
02-28-2004, 12:19 PM
This looks like an excellent begining to a HSM artical!!

Evan
02-28-2004, 01:58 PM
Very cool. Just try and buy something like that.

andy_b
02-28-2004, 10:06 PM
you guys are freakin' geniuses. i hope one day i can make something cool (and useful) like that.

andy b.