how to use a rotary table on a milling machine pricelist

Years ago, before I learned CNC, I owned a Phase II 8″ horizontal/vertical rotary table that I purchased from Kap Pullen’s Getmachinetools.com store. He has them at a good price, BTW, and he’s a darned nice fellow to deal with as well as being a frequent HSM contributor. Anyway, its a nice little table, but I hadn’t done a whole lot with it for quite a while after purchasing it. As is so often the case, one day, a project landed on my doorstep and I was glad to have it.

Before I could get started, however, I had to make some accessories for it. Basically, I needed some T-Nuts to fit the table, as well as a little fixture that makes it easy to hold a plate up off the table through a hole in the center so you can machine it. The latter, what I call a “plate machining fixture”, was inspired by something similar I saw the Widgitmaster of CNCZone fame using to make Dremel clamps for his mini-router:

The Plate Maching Fixture and 3 Homemade T-Nuts. T-Nuts are easy to make: square a block to the proper dimensions, mill the side reliefs, drill, and tap. These are much smaller than the mill’s Bridgeport standard T-slots, so I made them myself and I’m using 1/4-20 bolts with them. They’re made of mild steel.

I turned the round spigot using the 4-jaw on the lathe. I’m making the fixture out of MIC-6 aluminum plate, which is pre-ground very flat on the sides. This is a 5 inch by 3 inch piece. I’ve clamped it to the rotab using my T-nuts and the regular mill clamps and step blocks. It is sitting on parallels to make sure I don’t cut into the table. You can also see how I’ve clamped the rotary table to the mill table using a big cast iron V-block I have. You can never have to many blocks with precision faces hanging around!

Having a 4-jaw chuck on your rotary table is mighty handy! Because it’s a 4-jaw, you can dial in the workpiece by adjusting the jaws until it is perfectly concentric with the table’s axis of rotation. The best way is to make an adapter plate that attaches to the back of the chuck in the same way that your lathe does so you can exchange lathe tooling with the rotab. Here is an example:

For the example, the chuck is threaded onto the adaptor plate, and then the holes in the adapter plate’s flange are used to bolt down to T-nuts on the table.

In my case, I bought a 4-jaw from Shars brand new, and simply drilled some through-holes in the chuck to mount to the table directly without an adapter plate:

First, you want to make sure your part is properly centered on the table. To do that, I clamp the table down on the mill table (no special place is needed), put my Indicol indicator holder on the mill spindle, and find some round feature on the part to indicate on. For example, on the plate milling fixture above, indicate on the round boss, or on the center hole. Spin the table and bump the part in until spinning the table doesn’t move the indicator.

Second, locate the center of rotation directly under the mill spindle. You can simply use the X and Y table handwheels to do this. Use that Indicol to indicate off of a circular feature you want centered under the spindle. Turn the indicol around on the spindle and adjust the handwheels until the indicator stays put relative to the spindle position. A Blake Coaxial indicator will make this last even simpler.

When you’re rounding partially by cranking a part around on the rotary table, it’s really easy to go a little too far and screw things up. The answer is to drill the end points to make the exact stopping point on the rotab a lot less sensitive:

Centering with a Blake indicator is really fast, but what if you don’t have a Blake, or worse, what if your mill is too small to accomodate one? Here is a nice solution I found on a German site. This fellow has made an ER collect fixture for his rotary table, and has taken care that when installed on the table, the axis of the collet is aligned with the table’s axis. He can then place a dowel or other straight pin in the collet and line up until it will go into a similarly sized collet on the spindle. Nice trick! It’s similar to how Widgitmaster showed me to align a drill chuck on a QCTP to the lathe centerline with a dowel pin held in the lathe chuck.

... conventional machines. Axis movement is performed by high quality servomotors, increasing accuracy and efficiency. Simple handling and reliability make this model very popular.

... approximation of the motorized table, automatic advance of the rod, square guides on Y / Z axes, tilt front / rear of 45 ° and centralized lubrication as standard.

... stainless steel structure, these machines feature multi-station rotary tables for optimized processing time, and automatically manage the unwinding and winding of the cloths; the moving ...

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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.

The mill rotary table is one of the main accessories of milling machine. As a precision work positioning device, it is widely used for indexing drilling, milling, circumferential cutting, boring, etc. The rotary turn table for milling machine is made from casting with high quality, can work with a set of dividing plate.

Both vertical and horizontal with two functions. Circle cutting, indexing drilling, milling and more complicated work are possible when the vertical position of the table is used together with the tail part.

Three dividing plate set(Plate "A" - 15, 16, 17, 18, 19, 20 Plate "B" - 21, 23, 27, 29, 31, 33 Plate "C" - 37, 39, 41, 43, 47, 49). A set of wrench and screws are free for you with your installation.

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6" base adapter plate is ideal to use on 6" rotary tables of either 3 or 4 slots to mount either 4" , 5" 3-jaw ,6-jaw or 4-jaw self-centering lathe chucks.

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Compact precision CNC rotary table, suitable for single part or small batch production in precision engineering. A horizontal or vertical assembly is possible. You can not buy a better quality!

It is suitable as 4th axis on engraving and milling machines for engraving, lasering, drilling, grooving, milling or for use on a tool or surface grinding machine. Square, hexagonal, gear milling of any pitch or 3D machining is possible.

Technical data: - center distance 1500 mm- center height 400 mm- max. machining diameter FI 400 mm- motor power 4,0 kW- voltage 400 V / 50 Hz- spindle speed 3000 rpm- number of controlled axes 3- guide linear guides and ball screw- control MACH3 + software- pneumatic workpiece clamping- V-shape steel- milling spindle for flat engraving- compressed air supply 6 bar- dimensions L=2700, W=1400, H=1750 mm- net weight 1800 kg

Reversible clamp, 4th axis, rotary table, rotary dividing table, controlled rotary table, dividing attachment, dividing head, rotary indexing table rotary coupling

Kehren RIW9 CNC rotary table surface grinding machine Max workpiece diameter 900mm x 500mm height complete with internal grinding spindle it can be inspected in our warehouse in Gussago BS Italy Mimu Machine Tools