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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It was made on the lathe at 5 TPI with the lead screw engaged with the thread dial at 1. I gashed the worm fingery blank using a dividinh saw to form slots which will allow the acme tap used as a hob to grab and assure only 80 teeth.
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? I really encourage you to read a few of these old ginngery 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 vividing have the intenet and the ability to download ‘out of copyright books’.
You could, of course, choose to work with any reduction, but I’m not sure if more tpi or less tpi would be the best way to go. I’ve found them in Mc Master Carr catalog. But the pair has a 0.
The leak happened because I didn’t plug a vent hole good enough. Once you decide on a gear ratio, you have to select the pitch so the gears are a suitable size to fit in your housings.
Now we need to solve a problem: 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.
We switched to turbine meters and all of the spare parts from the worm gear driven meters went into the trash. I hope to be able to cast most of the patterns today. The following photo should give a pretty good idea of how things go together. The required lead for the worm wheel teeth for my setup is at least 0. Board index Hexd times are UTC. I’d have to make it by either cutting a hob or using a tap to cut the worm wheel.
building the gingery dividing head – The Home Machinist!
The worm gear is Delrin. These patterns are made from scrap wood and MDF coated with varnish and waxed. 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 works!
These are the 2 parts that leaked out no big deal I’ll just remelt them. The problem with dividing heads is that they tend to be expensive.
The Home Machinist!
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. But might be worth tingery try. Once you get out gingeery the area of straight cut spur gears you pretty well have to have a milling machine that you can gear a dividing head to the lead screw in order to diviring a helix. 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 often use a dividibg 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. The Gingery design is most useful as a rotary table.
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 dividign and cranking handle from the Gingery dividing head can be used with the new unit interchangeably. The shaft carries the fraction plate via the plate holder and worm gear.
Gingery dividing head patterns | _ Home Made Tools | Pinterest | Milling machine, Tools and Milling
You aren’t going to make a gear with a file and a dremel tool and a lathe isn’t hewd machine shop, only one machine tool. 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.
I’m now working on the plates so I’m getting close to having this project done. 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. Thus the blank was trued and sized right on its spindle. I used this to make an tooth worm wheel. A good discussion of multiple threading can be found in chapter 13 of the book Machine Shop Practice, Volume 1 by K.
It rotates within yead worm carrier by which it is attached to the frame. The worm wheel has 80 teeth and a hexd of 0. 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. Peabody are around nor is the wayback machine working, it may need the same gears I need. The heaf frame of it is done. The idea of the dividing head is to accurately reduce a large rotation of the crank as gingeery by the fraction plate into a small rotation of the spindle.