using a rotary table on a mill made in china

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Please refer to the pictures and diagram to be sure the kit will mount to your table.  Your rotary table should look similar to the one in the photo- for illustration only, the rotary table is not included with the CNC drive kit.

A turret milling machine is a vertical mill, meaning the spindle — the area that performs the cuts — is positioned vertically. The turret milling machine is

considered a versatile unit, because it can create a wide array of shapes. It has a quill that can be raised or lowered to create different cutting depths. Turret milling machines are only effective if they are kept at a relatively small size, because the quill is difficult to operate with larger units.

Rotary table in market mainly includes 4 kinds of mechanism that is worm gear, roller cam, DD driver and harmonic structure. The following is the introduction:

1. worm gear: it’s one of  the most popular structrue in NC rotary table  because of its irreversibility and costs.The worm is generally made of bronze, but the wear resistance is poor. In order to improve the service life, some manufacturers use the alloy steel.

2.roller cam: This is the most popular deceleration mode in the Chinese market. Compared with worm gear, it has many advantages, such as wear resistance, high transmission efficiency , good price and basically no maintenance. Chinese consumers like it very much.

3.DD motor: it’s the most efficient rotary table with the highest precision. It has the highest precision because it has no mechanical structure, which is directly driven by motor , no reducer. It has high technical difficulty and high price. It is generally used for five axis machine tools.

4. Harmonic driver: Harmonic reducer is a new transmission structure in gear reducer. It uses flexible gear to produce controllable elastic deformation and cause relative staggered teeth between rigid wheel and flexible wheel to transmit power and motion. This kind of transmission is essentially different from the general gear transmission, and has particularity in meshing theory, set calculation and structural design.

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Another plus for the Sherline RT is Sherline sells a bunch of accessories for it as well. There is a 5" tooling plate, a tilting angle table, and a variety of center adapters to mount a chuck to the RT. They also have a full CNC conversion including a CNC indexer if you ever wanted to go that way.

I was going to say I didn"t see that much of a price advantage on the no name Ebay rotary tables, but the Sherline is almost $300. I didn"t remember it being that much, in fact I paid less for my 6" Taiwan RT although it was lightly used.

In favor of the import rotary tables some of them are available with indexing plates and tail stocks allowing them to be used as an indexer as well as a rotary table.

My first rotab was a Wholesale Tool 6 inch. I was turning a 12 inch wheel center (had to weld it up to make it 12.25 dia) on the rotab with a large roughing endmill in the spindle while rotating the rotab (my lathe swing dia is 12.2 inches w/o locally grinding a divot into the lathe bed (partially into the tailstock way) - not that the tailstock would ever be that close to the chuck - I just did not want to be that much of a hack so I used the mill and rotab). I ended up shearing teeth on the ring gear in the rotab. Had I used a less aggressive cut, maybe roughed in the shape with a hand grinder before machining the rotab probably would have survived. Finished turning the wheel center at work during my lunch time (with the blessing of the guys in the machine/fab shop) on a 20 inch swing lathe - I"ve never operated a lathe that big and the pucker facter was high!

Now I have a PhaseII 6 inch rotab but have not had need to abuse it like I did the Wholesale Tool rotab. I still have the damaged rotab - figured I might make some sort of a tool out of it someday (4 yrs later still have not figured out what I might use it for).

For my needs an 8 inch rotab would probably be more durable but with a 6 inch 3-jaw attached to the 6 inch rotab, its at the weight limit that I can comfortably lift.

Lathe slides are designed to resist only turning forces which is usually directly down onto the slide. You are milling which puts loads on the slide it wouldn"t normally see. Make sure that the gibs on your slides are snugged up to reduce any lift or lash and if you don"t intend moving the slide during your milling, lock it up tight.

Another thing I would do it add some support to the rear of the table. If you can fix an angle or block to the base and clamp it down then you"ll find it a lot more rigind.

Finally your clamping of the part leaves a lot to be desired. You"re milling a long way from the clamp and if that flat bar is even slightly bowed it will hinge all over the place. You could put a second clamp on it ir if you don"t have the room for that without fouling the cutter try at least putting some low level stops in the dis-used slots to prevent hinging. Another thing you could do is put a piece of paper under the part near each edge of the table. That will improve clamping forces a lot.

when I was young, strong, healthy, and thought nothing of lifting it, a 10" H & V was my first choice. I still think it was a good choice for the work I mostly do, and this is where you may decide to compromise. If you do small work, an 8" table is much lighter and more convenient to set up. Stood vertical, it interferes less with the spindle to reach center. I don"t think a 6" is a good choice unless you know you will only be working miniature stuff. You use a considerable percentage of a small table just for set ups and hold down clamps on a lot of work, and a small table does not leave much room.

I like 90:1 gear ratio for circular milling, which is presumably your primary interest with a rotary table. My 10" table is 90:1, and that is a pretty good ratio for milling diameters (hand cranking) out to 12" or so. My 20" table is also only 90:1, and out near or past the rim (I do one part at 32" diameter) that always seems _very_ coarse.

If most of your work is small, round to begin with, and will actually be dividing work, where you index the table, lock it, and then drill a hole or mill a slot with the machine axis drive, you might find a dividing head more useful. For instance, I"ve made gears on a vertical rotary table, and in a spin index. On the table, you need an insert collet chuck or other arrangement in the center hole to get the work out far enough to clear the cutter. It"s a lot more convenient on a dividing head. OTOH, I don"t find it fun or convenient to do much circular milling on a dividing head if the work diameter is much over a few inches.

Dividing heads typically are 40:1, so faster to index, position to positon. But the milling capability on a radius is limited by the "coarse" ratio to smaller diameters, as is the usual work holding (collet or chuck) arrangement. A dividing head will tilt from below horizontal to past vertical, so you can mill, drill, bore or shape profiles at any angle in between.

an 8" H & V with dividing plates and set up, can usually be arranged somehow to do most of the work you might want to do on it. It is relatively light to move, and convenient to set up with reasonable space (spindle clearance, e.g.)limitations to be considered. A little bigger (10") is better, if you will ever need the capacity.

This forum is dedicated to those hobbyists with the 3-in-1 metalworking machines. Mill-Drill-Lathes. Tips, techniques, modification and use of these machines is topical.

I"m considering getting a rotary table for my V10 Maximat. I"ve seen the array of stuff on eBay and from the various suppliers. I don"t feel much like paying the asking price for an original Emco, which is only 4" anyway.

Anybody got any recommendations/comments as to which is the best ? I fiddled around with an 8" Phase 2 at a friend"s place recently, and found it to be kind of ratchety.

As to the milling base: The same friend has an Emco-Maier tabletop milling machine (I forget the model designation), which has the same head and column as on my V10, but has a much longer/deeper table than is possible on the V10. He showed me some old literature (from American Edelstaal) that listed the base unit as an accessory, allowing you to convert the V10 (or I suppose the V7) to two machines.

I can see already that I will be having to disassemble it and rework the insides because it turns very rough and the hand wheel has a whole degree of backlash.

I don"t have your experience or expertise to modify/re-machine the "Out of the East" stuff, so I don"t think I"ll try to make one of the Chinese-junk tables work.

I"ll keep looking for an original (or maybe East-European, they"re still good) rotary table. I may have to budget kind of tight for a few months, but good tools are worth it.

I even doubted about these mini airplane engines until I actually talked on the phone to the man, Robert Vought, who is recovering from a very serious cancer operation.

PeteH wrote:I"m considering getting a rotary table for my V10 Maximat. I"ve seen the array of stuff on eBay and from the various suppliers. I don"t feel much like paying the asking price for an original Emco, which is only 4" anyway.

Anybody got any recommendations/comments as to which is the best ? I fiddled around with an 8" Phase 2 at a friend"s place recently, and found it to be kind of ratchety.

As to the milling base: The same friend has an Emco-Maier tabletop milling machine (I forget the model designation), which has the same head and column as on my V10, but has a much longer/deeper table than is possible on the V10. He showed me some old literature (from American Edelstaal) that listed the base unit as an accessory, allowing you to convert the V10 (or I suppose the V7) to two machines.

Well, I"m strictly a "hobby machinist", which is why I"m on this BBS and not on "Practical Machinist". I just don"t have the skills to do some of the things I read about. I hope to gain them, though.

My professional background is chemistry and project management - and I was/am very good at both. I learned the little I know about machining by watching other guys work, and by asking questions. One guy who taught me a lot was a Czech gunsmith, another was an Austrian tool-and-die maker. I probably know only 10% of what I should, but hey, this whole life is a learning process, and now that I"m "semi-retired", I have more time to study.

My main interest in the rotary table was originally making gears... which I since found out is a messy business - and with some research, usually unnecessary. But the idea of being able to mill an O-ring groove (or a carburetor spacer) is very appealing.

I had to buy and American style steady rest and then found out that I had to adapt it big time because the Maximats have a .750 off-set spindle center line from the center line of the bed.

I saw the assembly and thought that I could use the gears and the motor for replacement but found out that none would fit the Maximat lathe or mill head.

So, I have opted to do the best I can and ended up having to buy Chinese garbage and make it work, because none that I have bought meets quality requirements expected here in the USA for most old timers that where blessed with working with the best machines available for most of their active lives.

I bought it from a posting in craigslist and I thought that I could have replacement gears and a motor. Came to find out that nothing would fit my Maximat, not even the motor.

I found out recently that Emco used to sell the base only, so you could remove the milling column and have it transported it this larger, more stable base.

I did not know that before I sold the power feed assembly. I hope I will not end up kicking myself you know where later on because I am looking for a separate mill.

Thanks, Jose... I think I"ve seen that same unit from several vendors, priced in the same general range. I believe you can get indexing plates for it for $50-$75 extra. I didn"t know it was horiz/vert, though - that makes it much more attractive.

Wouldn"t 4" be kind of small for any real work, though? (Keeping in mind that the Emco mill, with only 1/3 hp, really isn"t a "production" tool, it still would be more useful to hold a bigger workpiece.)

Adding a larger table would be a solution but then the clearance distance to the spindle would be so reduced specially if a chuck is being used, that will render the milling head almost useless.

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The rotary table is an accessory for the CNC floor type boring and milling machine. It can be working together with the floor type boring milling machine for milling angle, reverse boring, polyhedral machining, and other complex machining processes. It could do five sides machining if the main machine equipped the angle milling head.

CNC rotary table is a common part of CNC milling machine, often used as a servo axis of CNC milling machine, namely C axis of vertical CNC milling machine and B axis of horizontal CNC milling machine. The CNC rotary table includes the foot of the turntable, a round turntable surface, four rolling bearing parts arranged on the upper surface of the foot of the turntable, and a center with a self-aligning bearing installed at the center of the upper surface of the foot of the turntable. Support, each rolling bearing component includes a rolling bearing and a support that supports the rolling bearing through the axle. The center of the lower surface of the turntable is provided with a vertical downward axle. The turntable is installed on the foot of the turntable. The inner ring of the self-aligning bearing is fixed, and the rotating surface of the rolling bearing is in rolling contact with the lower surface of the turntable surface.

The CNC rotary table has an inclinometer with two orthogonal test axes as the test tool. The inclinometer is set at the center of the turntable surface to be leveled, so that the two orthogonal test axes of the inclinometer are parallel to the turntable surface, by adjusting the milling machine turntable. The leveling mechanism under the base makes the tilt angle value output by the two test shafts of the inclinometer turntable in the leveling state.

CNC rotary table and swing head are the key components of multi-coordinate CNC machine tools. Traditional rotary tables and swing heads using high-precision worm gears and other transmissions are not only difficult to manufacture, costly, but also difficult to achieve the speed and accuracy required for high-speed machining. Therefore, it is necessary to develop a new electromagnetic drive system for the CNC milling machine turntable and swing head in a different way to realize the zero-drive drive of the rotational motion coordinates of the CNC machine tool.

1. The CNC turntable uses modular design technology. The PAN turntable and TILT turntable are independent components, which are easy to disassemble and can be controlled by linkage or individually.

2. The use of AC servo motor drives the harmonic wave reducer transmission system to ensure that the equipment not only runs stably at low speeds, but also has fast dynamic response performance.

3. The automatic control system is composed of a PC and a motion controller based on DSP, which ensures the openness and convenience of expansion of the automatic control system.

4. The control software developer platform uses the Windows platform, which can make full use of various data visualization development tools, which greatly simplifies the progress of experimentation, research, and research and development.

TJR Precision Technology, a known manufacturer of Rotary tables, is found in 2009. Since its establishment, we have focused on the R&D and manufacturing of high-precision key components for CNC machine tools, such as CNC Rotary Table, Rotary Table, index Table, and other accessories with high precision and stability. Our products are mainly used in the aerospace industry, high-tech electronics industry, automotive component manufacturing, multi-faceted spiral processing industry and various industrial machinery. We have the best research and development team that integrates the applications of machine centers and Rotary tables, and have the strictest quality control to ensure the highest quality. We also have the most active customer service to make the Rotary Table work in the optimal condition....

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TANSHING ACCURATE INDUSTRIAL CO., LTD. is one of the Rotary Table and index Table manufacturer. We have passed the ISO9001 quality system certification. We insist on the concept of "Quality first, prestige important", and after continuous innovation and development, the products have been widely used in many fields. Not only the products sold well in the world"s market, but also have enjoyed a good reputation in the markets. We offers the customers with Rotary Table of excellent quality and best service, hope to build a new brilliant with you in the future.

On a manufacturing area of 12,000 square meters, HOSEA PRECISION has been focusing on producing high precision Rotary tables that meet the quality standards in western markets. Our Rotary tables have been sold & widely used in the European market and have an enormously high reputation amongst our customers. More and more manufacturers across Europe cooperate with us and make use of our 5 axis Rotary tables, Rotary Table and other products. With a Hosea Rotary Table you always know what you get: a quality product that was manufactured in a quality production process - from start to finish. With this attitude and as a member of the Taiwan Machine Center Alliance, we continue to provide the best products for the high-tech machine tool industry of today and the future.

Spintop has been specialized precision Rotary Tables for more than two decades. Our CNC/NC Rotary tables are designed with many different size apertures, Table diameters, and mounting options to provide the ideal solution for your industrial automation application. Our products are widely used in industrial robots, fiberoptics and photonics, vision systems, machine tools, semiconductor equipment, medical component laser machining, electronic manufacturing, and other high-performance industrial automation applications. Welcome to visit our showroom to view relative products: CNC Rotary Table, Double Axis Tilting CNC Rotary Table and Tailstock Rotary Table, NC Rotary Tables and more. If you need the further details of our Rotary tables, please kindly contact us at any time.

Multiplas Enginery Co.,Ltd. was established in 1988 and is the professional injection molding machines and Rotary Table manufacturer in Taiwan. We believe that our professional experience and reasonable prices will help you in your market bring much more business for you. Your suggestion always welcome, and we are looking forward to cooperating with you and a mutually profitable relationship. If you are interested our products, contact us, we will offer you the best price and superior high quality. We wish to have a long term business relationship with you.

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Saynen manufactures CNC Rotary tables for machining centers with rich experiences, vast industry knoledge and expertise. Based on our nearly 50-year experience in this field, we can produce high-precision Rotary tables. All our products can be used in both vertical & horizontal directions to accommodate the requirements of various machining facilities. To ensure our quality, we developed an inspection system with the Mechanical Industry Research Lab at Industrial Technology Research Institute. Due to the mentioned experience and new investment, we are able to produce major parts in house, under strict QA system in order to best control the quality. We deeply believe that our Rotary tables can compete with those similar products made in Japan, USA, Germany and so on. Contact us for more!

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Gin Chan Machinery Co., Ltd. was established in Taipei in 1988. With an expert team dedicated to the production of milling and grinding components and accessories, a first 5000m² factory with 70 employees was established.

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TJR Precision Technology co., Ltd. is a professional manufacturer of CNC Rotary tables (the 4th and 5th axis). The main products are CNC Rotary Table, CNC index Table, and other accessories with high precision and stability.

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detron Machine Co., Ltd. is a professional manufacturer of CNC Rotary tables. With the company"s policy of sincerity, practicality, professionalism and perseverance, we have dedicated ourselves to technological R&D and innovation. This is combined with our rigorous quality control system to ensure each Rotary Table from detron will present outstanding quality. In addition, we have also invited several machine tool design engineers to join together with our R&D team. This joint force enables us to achieve the best possible integration between the machine tool and the Rotary Table, therefore maximizing the Rotary Table performance. The outstanding quality of detron CNC Rotary tables is competitive with imported products and this is the major reason why detron CNC Rotary tables have been recognized...

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Gn Chan Machinery Co., Ltd. was established in Taipei in 1988. With an expert team dedicated to the production of milling and grinding components and accessories, a first 5000m² factory with 70 employees was established.

In 1997, a second branch of Gin Chan was established in Dong Guan City, China. The goal was to expand the production of mold and die accessories as well as increase sales. This factory has 10000m² floor space and about 200 employees working there.

We are always striving towards product improvements, and so Gin Chan received ISO9001 certification in 2003. At the same time, Gin Chan started implementing a new “Continuous Improvement and Employee Empowerment” management system.

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CNC Rotary tables are attachments for machining centers. It is known as the 4th axes in Taiwan. A good 4th axis must basically possess the characteristics of “indexing accuracy” and “repeated accuracy.” In order to achieve high accuracy, the 4th axes must have good warm gears and warm sets, as well as precision construction. Based on our nearly 50-year experience in producing high-precision gears, we are able to produce high-precision warm gears and warm sets. In addition, we specially purchased a CNC boring machining center from Toshiba, Japan to produce high-precision construction. Also, to ensure our quality, we developed an inspection software with the Mechanical Industry Research Lab (MIRL) at Industrial Technology Research Institute (ITRI). Due to the mentioned experience and new investment,...

2. The feature of wear resistant alloy dual-lead worm gear is high mechanical efficiency of power transmission, high indexing accuracy and easy adjusted on the backlash.

2. The feature of wear resistant alloy Double-Lead Worm Gear is high mechanical efficiency of power transmission, high indexing accuracy and easy adjusted on the backlash.

The state-of the art in house produced ocean Technologies Rotary Table can fully submerged in water. The isolation grade of IP68 Rotary Table employs motorized spindle that features outstanding accuracy performance.

1. Hydraulic Clamping adapted wholly circular hydraulic clamping system. It can assure the heavy and steady cutting without any deviation from the center.

2. The feature of wear resistant alloy double-lead worm gear is high mechanical efficiency of power transmission, high indexing accuracy and easy adjusted on the backlash.

NCT-RB Tables have a rear mounted drive motor, especially suited for use on compact machines and where the workspace is limited. High rigidity and excellent thrust force capabilities due to its optimal structure design.

1. Pneumatic clamping adopted the disc of clamping system to enlarge clamping force and can ensure heavy-duty continuous cutting. The feature of wear resistant alloy Double-Lead Worm Gear is high mechanical efficiency of power transmission high indexing accuracy and easy adjusted on the backlash.

A rotary table is a precision work positioning device used in metalworking. It enables the operator to drill or cut work at exact intervals around a fixed (usually horizontal or vertical) axis. Some rotary tables allow the use of index plates for indexing operations, and some can also be fitted with dividing plates that enable regular work positioning at divisions for which indexing plates are not available. A rotary fixture used in this fashion is more appropriately called a dividing head (indexing head).

The table shown is a manually operated type. Powered tables under the control of CNC machines are now available, and provide a fourth axis to CNC milling machines. Rotary tables are made with a solid base, which has provision for clamping onto another table or fixture. The actual table is a precision-machined disc to which the work piece is clamped (T slots are generally provided for this purpose). This disc can rotate freely, for indexing, or under the control of a worm (handwheel), with the worm wheel portion being made part of the actual table. High precision tables are driven by backlash compensating duplex worms.

The ratio between worm and table is generally 40:1, 72:1 or 90:1 but may be any ratio that can be easily divided exactly into 360°. This is for ease of use when indexing plates are available. A graduated dial and, often, a vernier scale enable the operator to position the table, and thus the work affixed to it with great accuracy.

Rotary tables are most commonly mounted "flat", with the table rotating around a vertical axis, in the same plane as the cutter of a vertical milling machine. An alternate setup is to mount the rotary table on its end (or mount it "flat" on a 90° angle plate), so that it rotates about a horizontal axis. In this configuration a tailstock can also be used, thus holding the workpiece "between centers."

With the table mounted on a secondary table, the workpiece is accurately centered on the rotary table"s axis, which in turn is centered on the cutting tool"s axis. All three axes are thus coaxial. From this point, the secondary table can be offset in either the X or Y direction to set the cutter the desired distance from the workpiece"s center. This allows concentric machining operations on the workpiece. Placing the workpiece eccentrically a set distance from the center permits more complex curves to be cut. As with other setups on a vertical mill, the milling operation can be either drilling a series of concentric, and possibly equidistant holes, or face or end milling either circular or semicircular shapes and contours.

* To create large-diameter holes, via milling in a circular toolpath, on small milling machines that don"t have the power to drive large twist drills (>0.500"/>13 mm)

* With the addition of a compound table on top of the rotary table, the user can move the center of rotation to anywhere on the part being cut. This enables an arc to be cut at any place on the part.

Additionally, if converted to stepper motor operation, with a CNC milling machine and a tailstock, a rotary table allows many parts to be made on a mill that otherwise would require a lathe.

I"ve had it for maybe 22 years now and have found it to be quite accurate and reliable. I"ve made some changes: all of the belt guards were removed years ago so I could construct a speed reducer. I"ve used it most recently to adapt some parts to my weird motorized bike and to make some large bushings for some clock or other.

The mill works better than I had expected. I think the last mill project I had was to duplicate the "jaw" of a movement post: the brass one had stripped out, so I replaced it with a steel one, salvaging the steel from a trash-can axle. As on any machine tool you have to expect some flexing, and so light cuts are helpful if you"re dealing with anything but aluminum. I don"t think I can use any but the smallest and simplest rotary table-thing (with or without chuck) given the space constraints.

I"ve been threatening to buy a four-jaw independent chuck for this machine since I"ve owned it, but thus far the 3-jaw self-centering scroll chuck that came with it has proven just fine.

While my humble Grizzly won"t do everything (say, left-handed threads or thick workpieces) it will do a great deal, well beyond my feeble abilities as a machinist. In high school I learned machining on a very nice South Bend ten-inch engine lathe, and I find that I make precisely the same errors on the Grizzly that I did on the noble South Bend. I imagine that the mill would be great for bushing a clock plate, but the Grizzly lives in the garage and I work in our dining room with my creaky drill press, bench vise, and an arbor press residing in our adjacent home office.

5-axis cnc gantry machine center High machining accuracy, high rigidity of the bed, automatic selection of processing volume, high productivity, generally 3~5 times that of ordinary machining centers, can handle the processing of some complex parts, which can be increased by ten times or even dozens of times.

cnc machine center is an important industrial equipment for manufacturing. The five-axis machining center can process various complex surfaces or special-shaped parts, such as turbine engine blades, engine propellers, and some complex surfaces and special-shaped parts.