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 we need to solve a problem: The above picture shows the major parts of the finished project. I’ve found them in Mc Master Carr catalog. The worm wheel, worm carrier, and ginhery plate holder are PVC. We switched to turbine meters and all of the spare parts from the worm gear driven meters went into the trash. The white one I tried some cheap spray paint on it just to see how it would work for a finish I think the varnish works better.
I used this to make an tooth worm wheel. But might be worth a try. The problem with dividing heads is that they tend to be expensive. The indexer is solidly built and accepts 5C collets. The dark area dividinb the picture is the groove of a single thread.
I don’t think Sherman or Mr. I’m really not sure I understand everything I know about this Greg Hornbostel. Every day I ask myself, “What’s the most fun thing to do today.
building the gingery dividing head – The Home Machinist!
The photo above shows an end view of the dividing head with a collet, the fraction plan holder, a plate, and the hand crank. Each single thread bead the desired lead of 0.
Since each thread on the worm gear has a lead of 0. The main frame of it is done. The solution is to use a double-threaded or double start worm gear. Anyone know where to find these gears at that price? I started machining the steel parts and will post photos later.
The photo above shows the side of the modified spin dividihg with the hand crank and one of the fraction plates described in the Gingery book. It rotates gignery the worm carrier by which it is attached to the frame. Constructing a Cheap Dividing head. 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.
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. A good discussion of multiple threading can be found in chapter 13 of the book Machine Shop Practice, Volume 1 by K.
The frame is held to the right end of the indexer casting by a couple of bolts after drilling and tapping the casting. Last edited by norman on Sun Mar 19, 3: Dividing heads are usually used with milling machines for making gears, reamers, etc.
I’d have to make it by either cutting a hob or using a tap to cut the worm wheel. The problem with spin indexers is that they limit your choice of angle. The photo to the left shows a 20 tooth gear I cut using the dividing head and my vertical milling machine, just to prove to myself that it diiding These patterns are made from scrap wood and MDF coated with varnish and waxed.
Moltrecht ISBN v. This all of the patterns I have made,only pattern left to make is the indexing plate pattern.
In this design following Gingery the reduction is Thus the blank was trued and sized right on its spindle. The indexer has served well for jobs where the divisions come out to even 1-degree values.
Gingery dividing head patterns | _ Home Made Tools | Pinterest | Milling machine, Tools and Milling
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 leak happened because I didn’t plug a vent hole good enough. If we use a simple worm gear with a pitch of 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?
The Home Machinist!
Once you decide on a gear ratio, you have to select the pitch so the gears are a suitable dividign to fit in your housings. Board index All times are UTC.
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. 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.
Once you get out of the area of straight cut ginngery gears you pretty well have to have a milling machine that you can gear a dividing head to the lead screw in order to mill a helix. The shaft carries the fraction plate via the plate holder and worm gear.
I hope to be able to cast most of the patterns today. The Gingery design is most useful as a rotary diciding. The frame is made of a flat iron plate. I often use a computer printout of a hole circle or degree wheel taped to the Gingery fraction plate to adjust strange angles.