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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building the gingery dividing head – The Home Machinist!
The photo to the left shows a 20 tooth gear I cut using the dividing head and gungery vertical milling machine, just ginbery prove to myself that it works!
The worm wheel has 80 teeth and a pitch 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.
I’d kept some of the thrown away The photo above shows an end view of the dividing head with a collet, the fraction plan holder, a plate, and the hand crank.
We switched to turbine meters and all of the spare parts from the worm gear driven meters went into the trash. The problem with dividing heads is that they tend to be expensive. The goal of this project is dkviding build a dividing head from an inexpensive spin indexer and parts borrowed from the Gingery dividing head project. Now we need to solve a problem: You could, of course, choose to work with any reduction, but This is fine for when one does not want to make and drill a fraction plate.
Constructing a Cheap Dividing head. You aren’t going to make a dividingg with a file and a dremel tool and a lathe isn’t a machine shop, only one machine tool. I started machining the steel parts and will post photos later.
Since each thread on the worm gear has a lead of 0.
The Home Machinist!
The shaft carries the fraction plate via the plate holder and worm gear. 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 frame is made of a flat iron plate. This all of the patterns I have made,only pattern left to make is the indexing plate pattern. I have the start of the dividing head cast and machined here’s a couple of photos.
The indexer is solidly built and accepts 5C collets. On the left side is the unfinished casting that will gingrry the index plate carrier. I’m really not sure I understand everything I know about this Greg Hornbostel. Once you get out of the area of straight cut spur gears you pretty well have to have a milling diivding that you can gear a dividing head to the lead screw in order to mill a helix.
Gingery dividing head patterns | _ Home Made Tools | Pinterest | Milling machine, Tools and Milling
In this design following Gingery the reduction is Just what we want. It was made on the lathe at 5 TPI with the lead screw engaged with the thread dial at 1. The indexer has served well for jobs where the divisions come out to even 1-degree values.
The leak happened because I didn’t plug a vent hole good enough. Last edited by norman on Sun Mar 19, 3: If we use a simple worm gear with a pitch of 0.
Moltrecht ISBN v. The spin indexer spindle O.
The problem with spin indexers is heas they limit your choice of angle. The above picture shows the major parts of the finished project.
The set collar on the spindle has 3 radial screws as well to grab the spindle shaft. A site dedicated to enthusiasts of all skill levels and disciplines of the metalworking hobby.
I’m now working on the plates so I’m getting close to having this project done. It rotates within the worm carrier by which it is attached to the frame. The dark area in the picture is the groove of a single thread. These are the 2 parts that leaked out no big deal I’ll just remelt them. Thus the blank was trued and sized right on its spindle. I’d have to make it by either cutting a hob or using a tap to cut the worm wheel.
These patterns are made from scrap wood and MDF coated with varnish and waxed. I have 5 parts in there Some times things don’t always go good I had 2 of the patterns leak out of the bottom. 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 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. The main frame of it is done. Each single thread has the desired lead of 0.
The frame is held to the right end of the indexer casting by a couple of bolts after drilling glngery tapping the casting. I’ve found them in Mc Master Carr catalog.
The 5C spindle was mounted between centers to start the blank sizing for the worm wheel.