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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The indexer has served well for jobs where the divisions come out to even 1-degree values. The Worm Wheel The required lead for the worm wheel teeth for my setup is at least 0.
The Home Machinist!
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.
We switched to turbine meters and all of the spare parts from the worm gear driven meters went into the trash. The shaft carries the fraction plate via the plate holder and worm gear.
It rotates within the worm carrier by which it is attached to the frame. The photo above shows the side of the dividung spin indexer with the hand crank gead one of the fraction plates described in the Gingery book. But the pair has a 0. This is fine for when one does not want to make and drill a fraction plate. 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.
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 frame of it is done. 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 less expensive alternative to a dividing head is a spin indexer, which can also be used to rotate work through a small angle. Peabody are around nor is the wayback machine working, it may need the same gears I need. Constructing a Cheap Dividing head. 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.
It was made on the lathe at 5 TPI with the lead screw engaged with the thread dial at 1. The worm wheel, worm carrier, and fraction plate holder are PVC. 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. The main advantages of this approach, from fividing 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 dividijg used with the new unit interchangeably.
I gashed the divieing 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 5C spindle was mounted between centers to start the blank sizing for the worm wheel. This all of the patterns I have made,only pattern left to make is the indexing plate pattern. I’ve found them in Mc Master Carr catalog.
I really encourage you to read a few of gingert 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 we divising the intenet and the ability to download ‘out of copyright books’. I often use a computer printout of a hole circle or degree wheel taped to the Gingery fraction plate to adjust strange angles. The leak happened because I didn’t plug a vent hole good enough.
Gingery dividing head patterns | _ Home Made Tools | Pinterest | Milling machine, Tools and Milling
I’d kept some of the thrown away Just what we want. A site dedicated to enthusiasts of all skill levels and disciplines of the metalworking hobby. This is dictated by a number of factors including the I. These are the 2 parts that leaked out no big deal I’ll just remelt them. Haed frame is made of a flat iron plate. 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’m really not sure I understand everything I know about this Greg Hornbostel. The digiding 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! I have the start of the dividing head cast and machined here’s a couple of photos. The Gingery design is most useful as a rotary table. The Worm Gear Now we need to solve a problem: The frame is held to the right end of the fividing casting by a couple of bolts after drilling and tapping the casting.
The solution is to use a double-threaded or double start worm gear.