The Dividing Head & Deluxe Accessories [David J. Gingery] on * FREE* shipping on qualifying offers. The Dividing Head is also known as book 6 . The goal of this project is to build a dividing head from an inexpensive spin indexer and parts borrowed from the Gingery dividing head project. The main. I’m getting close to finishing a dividing head that is pretty close to the unit prescribed in Gingery’s Dividing Head and Deluxe Accessories.
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I started machining the steel parts and will post photos later. A dividing head is an accessory for accurately and repeatably rotating a piece of work through a small angle, for example to rotate a gear blank by the angle of a single tooth.
A few years ago I bought an Enco spin indexer. The Frame The frame is held to the right end of the indexer casting by a couple of bolts after drilling and tapping the casting. Moltrecht ISBN difiding. But the pair has a 0.
I’ve toyed with the idea of making the gears myself but I don’t know if I can as I do not know how to cut the worm to the right shape the worn is a 12 pitch and I know that 12 tpi is not the same, any ideas on that?
Gingery dividing head patterns | _ Home Made Tools | Pinterest | Milling machine, Tools and Milling
I hope to be able to cast most of the patterns today. Last edited by norman on Sun Mar 19, 3: Now I’m trying to find the gears at a low price. The Gingery design is most useful as a rotary table. The white one I tried some cheap spray paint on it just to see how it would work for a finish Dividint think the varnish gimgery better. The solution is to use a double-threaded or double start worm gear.
building the gingery dividing head – The Home Machinist!
I often use a computer printout of a hole circle or degree wheel taped to the Gingery fraction plate to adjust strange angles. The Worm Wheel The required lead for the worm wheel teeth for my setup is at least 0. That is what a worm is and the gear that it runs with ginhery a worm gear and that also has a helix angle to work with heaad worm.
A good discussion of multiple threading can be found in chapter 13 of the book Machine Shop Practice, Volume 1 by K. If we use a simple worm gear with a pitch of 0.
I divding to work in the oil field and some of our meters had the worm gears in them of different types and sizes wish now I’d kept some of the thrown away parts now. These are the 2 parts that leaked out no big deal I’ll just remelt them.
I have 5 parts in there Some times things don’t always go good I had 2 of the patterns leak out of the bottom.
A digiding expensive alternative to a dividing head is a spin indexer, which can also be used to rotate work through a small angle. The following photo should give a pretty good idea of how things go together. The set collar on the spindle has 3 radial screws as well to grab the ginbery shaft. I’m not sure if more tpi or less tpi would be the best way to go. Anyone know where to find these gears at that price? This is fine for when one does not want to make and drill a fraction plate.
On the left side is the unfinished casting that will be the index plate carrier.
Peabody are around nor is the wayback machine working, it may need the same gears I need. The following photos show a few other views of the finished project and a 20 tooth gear cut using it.
The Home Machinist!
The main frame of it is done. I really encourage you to read a few of these old books and in the process you will probably find out that hea of what “Dave” has been selling to all of you is actually free and really easy to access now that we have the intenet and the ability to download ‘out of copyright books’.
I’m really not sure I understand everything I know about this Greg Hornbostel. The main advantages of this approach, from my point of view, are that the large spindle bore of my spin indexer allows it to use 5C collets, and that the fraction plates and cranking handle from the Gingery dividing head can be used with the new unit interchangeably. I’ve found them in Mc Master Carr catalog.
Board index All times are UTC. You aren’t going to make a gear with a file and a dremel tool and a lathe isn’t a machine shop, only one machine tool. I’d have to make it by either cutting a hob or using a tap to cut the worm wheel. I belileve that after you get done with that section you will, if you are a machinist to begin with, be able to make this gear set, if you have the machine tools to begin with, which you don’t as you will need a dividing head to manufacture any gear. Just what we want.
The photo above shows the side of the modified spin indexer with the hand crank and one of the fraction plates described in the Gingery book. The idea of the dividing head is to accurately reduce a large rotation of the crank as measured by the fraction plate into a small rotation of the spindle.
I gashed the worm wheel blank using a slitting saw to form slots which will allow the acme tap used as a hob to grab and assure only 80 teeth. In this design following Gingery the reduction is The required lead for the worm wheel teeth for my setup is at least 0. The indexer is solidly built and accepts 5C collets. Dividing heads are usually used with milling machines for making gears, reamers, etc.
It rotates within the worm carrier by which it is attached to the frame. I wonder how well a home made worn and worm gear would work if by chance I could get the ratio at 40 to 1? It was made on the lathe at 5 TPI with the lead screw engaged with the thread dial at 1.