how to use a rotary table and dividing plates in stock

This plate can be used either directly, or through a geared dividing mechanism. In direct indexing the workpiece and plate rotate in a 1-to-1 ratio, and holes are used directly. That is, a plate with 12 holes can divide the workpiece into 2, 3, 4, 6, or 12 equal segments. A dividing head incorporates an internal gear ratio (usually 40:1, 60:1, or 90:1) with the same plates. In doing so, the dividing head enables many more combinations than just direct indexing.

For example, imagine a plate with 15 equally-spaced holes and a dividing head with a 40:1 gear reduction. In direct indexing, a workpiece could be divided into 3, 5, or 15 equal segments. Using the dividing head, the same workpiece could be divided into 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 25, 30, 40, 50, 60, 75, 100, 120, 150, 200, 300, or 600 segments. Essentially, the dividing head acts as if it’s a direct indexer with 600 holes; 15 holes in the actual plate * 40:1 gear ratio. Let’s look at how some of these combinations are possible.

I have an 8" Rutland horizontal/vertical RT made in Taiwan that is about all I want to carry around without mechanical help. It has done all I ask of it, and a larger fixture plate mounted to the top of the table could be up to any diameter I care to make it. It is a high quality RT, and I am happy with it. Just went out and weighed it on a bathroom scale, said ~55 pounds. I also recently picked up a beautiful old adjustable height tailstock for it. It is also very heavy and solid, maybe 25 pounds.

I also have a 6" swing dividing head (no maker"s mark, WWII?) with two sets of three dividing plates, two D.E. Whiton 1-3/4" 8 tpi mount chucks (3 and 4 jaw, also marked Rivett!}, and #9 B&S spindle tooling for it as well, and a mill mounting table adapter plate that holds the dividing head and the tailstock to it for quick mounting to the mill table. Throw it on the mill, tighten 4 bolts, and it is ready to use, with less than .001" tolerance fit everywhere.

Given the choice between dividing head and rotary table, I vote for both! The jobs they do are mostly quite different, and one does not work for the other very well. In a pinch, yes, it can be done.

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VEVOR is a leading brand that specializes in equipment and tools. Along with thousands of motivated employees, VEVOR is dedicated to providing our customers with tough equipment & tools at incredibly low prices. Today, VEVOR has occupied markets of more than 200 countries with 10 million plus global members.

VEVOR is a leading brand that specializes in equipment and tools. Along with thousands of motivated employees, VEVOR is dedicated to providing our customers with tough equipment & tools at incredibly low prices. Today, VEVOR has occupied markets of more than 200 countries with 10 million plus global members.

The indexing plate is a machine tool accessory that holds the workpiece on the chuck or between two pinnacles and rotates, indexing and positioning it. Plate connected with rotary indexing table is in Diameter: 4"/100mm and Thickness: 0.28"/7mm, good for rotary tables in Model HV-3, HV-4, HV-5, HV-6, TS160. Perfect to use with dividing head for milling table.

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It swivels so you can set it up so the face is horizontal but by the time you add a chuck it"s getting quite high and you sometimes run out of room for the tooling.

I have used it in the vertical position to cut a 107 tooth gear which isn"t covered by any of the dividing head wheels I"ve got. I set up an excel spreadsheet with the angle required for each tooth which isn"t as easy as it sounds as the rotary table is calibrated in degrees/minutes/seconds rather than decimal degrees so it took a bit of figuring out how to do it.

Anyway, I cut the gear all right (crossing out each angle on the spreadsheet as each tooth was cut) but you really need to be concentrating using this method.

One problem I had with the BS-0 is that the tapered hole isn"t a #2 Morse taper but a Brown and Sharp taper which meant I couldn"t find any collets for it. In the end I made a 1/2" collet out of brass which I found to be really useful. I don"t know if that is the case with the modern versions.