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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Anyone know where to find these gears at that price? Board index All times are UTC.
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. The indexer is solidly built and accepts 5C collets.
The 5C spindle was mounted between centers to start the blank sizing for the worm wheel.
Constructing a Cheap Dividing head. The indexer has served well for jobs where the divisions come out to even 1-degree values.
The spin indexer spindle O. The required lead for the worm wheel teeth for my setup is at least 0.
The Home Machinist!
The main advantages of this approach, from my point of view, xividing 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’m really not sure I understand everything I know about this Greg Hornbostel.
I’m not sure if more tpi or less tpi would be the best way to go. That is what a worm is and the gear that it runs with is a worm gear and that also has a helix angle to work with the worm.
If we use a simple worm gear with a pitch of 0. The following photos show a few other views of the finished project and a 20 tooth gear cut using it. I’ve found them in Mc Master Carr catalog.
Every day I ask myself, “What’s the most fun thing to do today. 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?
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 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 bought several popular sizes. Dividing heads are usually used with milling machines for making gears, reamers, etc.
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. This dividlng of the patterns I gingdry made,only pattern left to make is the indexing plate pattern. The set collar on the spindle has 3 radial screws as well dividjng grab the spindle shaft.
If your housings are sized according to the plans, you have little or no leeway to change the gears, you need a 40 tooth gear and worm of a pitch that fit the housings.
Gingery dividing head patterns | _ Home Made Tools | Pinterest | Milling machine, Tools and Milling
The dark area in dividijg picture is the groove of a single thread. The leak happened because I didn’t plug a vent hole good enough. Last edited by norman on Sun Mar 19, 3: I then fastened the blank to the end set collar with 3 screws at degrees, slipped the thing on the gingsry 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.
Moltrecht ISBN v. I often use a computer printout of a hole circle or degree wheel taped to the Gingery fraction plate to adjust strange angles. Now I’m ginegry to find the gears at a low price.
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. The Gingery design is most useful as a rotary table. The worm wheel, worm carrier, and fraction plate holder are PVC. I used this to make an tooth worm wheel. This is fine for when one does not want to make and drill a fraction plate.
I don’t think Sherman or Mr. I’m now working on the plates so I’m getting close to having this project done. I started machining the steel parts and will post photos later. But might be worth a try. I’d kept some of the thrown away 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.
It was made on the lathe at 5 TPI with the lead screw engaged with the thread dial at 1.
The solution is to use a double-threaded or double start worm gear.