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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Now I’m trying to find the gears at a low price. The dark area in the picture is the groove of a single thread.
Gingery dividing head patterns | _ Home Made Tools | Pinterest | Milling machine, Tools and Milling
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. I then fastened the blank to the end set collar with 3 screws at degrees, slipped the thing on the 5C spindle mounted it on the 7×12 lathe between the 4 jaw chuck on one end and a 60 degree center held in an appropriate collet hiding inside a socket spacer on the other end. I started machining the steel parts and will post photos later.
Anyone know where to find these gears at that price? I used this to make an tooth worm wheel.
The goal of this project is to build a dividing head from an inexpensive spin indexer and parts borrowed from dividinh Gingery dividing head project.
The price of these gears is really cheap considering the skill and equipment required to make a worm and worm gear of the class required by a dividing head. A few years ago I bought an Enco spin indexer. I belileve that after you get done with that section you will, if you are a machinist to hewd 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.
But the pair has a 0. Last edited by norman on Sun Mar 19, 3: I really encourage you to read a djviding of these old books and in the process you will probably find out that most of what “Dave” has been selling to all of you is actually free and really easy to access now that diciding have the intenet and the ability to download ‘out of copyright books’. I used 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.
The worm wheel has 80 teeth and a pitch of 0. dividong
The Home Machinist!
Once you decide on a gear ratio, you have to select the hesd so the gears are a suitable size to fit in your housings. Peabody are around nor is the wayback machine working, it may need the same gears I need. In this design following Gingery the reduction is The solution is to use a double-threaded or double start worm gear.
The set collar on the spindle has 3 radial screws as well to grab the spindle shaft. This is fine for when one does not want to make and drill a fraction plate. The Gingery design is most useful as a rotary table.
Dividing heads are usually used with milling machines for making gears, reamers, etc. The 5C spindle was gingry between centers to start the blank sizing for the worm wheel.
Each single thread has the desired lead of 0.
I bought several popular sizes. 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. I’m really not sure I understand everything I know about this Greg Hornbostel.
The shaft carries the fraction plate via the plate holder and worm gear. The worm gear is Delrin. The worm wheel, worm carrier, and fraction plate holder are PVC. These patterns are made from scrap wood and MDF coated with varnish and waxed.
The photo above shows an end view of the dividing head with a collet, the fraction plan holder, a plate, and the hand crank.
A site dedicated to enthusiasts of all skill levels and disciplines of the metalworking hobby. 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.
Just what we want. On the left side is the unfinished casting that will be the index plate carrier. 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? 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.
I often use a computer printout of a hole circle or degree wheel taped to the Gingery fraction plate to adjust strange angles.
building the gingery dividing head – The Home Machinist!
This is dictated by a number of factors including the I. The Worm Wheel The required lead for the worm wheel teeth for my setup is at least 0. 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.
You could, of course, choose to work with any reduction, but The spin indexer spindle O. The above picture shows the major parts of the finished project.
This all of the patterns I have made,only pattern left to make is the indexing plate pattern. The required dviding for the worm wheel teeth for my setup is at least 0. The problem with dividing heads is that they tend to be expensive.
The Worm Gear Now we need to solve a problem: It rotates within the worm carrier by which it is attached to the frame. It was made on the lathe at 5 TPI with the lead screw engaged with the thread dial at 1.
A less expensive alternative to a dividing head is a spin indexer, which can also be used to rotate work through a small angle. I have the start of the dividing head cast and machined here’s a couple of photos.