machinist rotary table made in china

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.

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.

I"m looking at new 12" horizontal / vertical rotary tables. I"ve always liked Yuasa equipment, so I did a search for a Yuasa 550-052 rotary table at several of the larger tool dealers.

In MSC, they have both Yuasa and Phase II tables listed. What doesn"t make sense, is the Phase II is more than the Yuasa. So, I looked at Penn Tool Co, and under the listing for the Yuasa, they show a photo of a Phase II table. Then I checked out Travers, and the same thing, a Phase II is shown under the Yuasa listing.

I own a Sherline 4" rotab and it is quite good. However, it is also somewhat limited in that it does not accept dividing wheels and it does not have a table release; you have to crank it around to get to your next location. It is quite well made, reliable and accurate. It will mount to a milling table as well as a tilting angle table without eating up that much room in Z.

I also own a Japan-made 6" Yuasa that is pretty much fully tooled up. This is a really fine, fully featured rotab that is probably the most cloned rotary table out there. Vertex makes a clone that is quite close. Smooth, accurate and no longer made.

The only other import I have heard of that might meet your needs is the Warco HV-4: https://www.warco.co.uk/rotary-tables-engineering-tools/124-hv4-rotary-table.html. At that price, I"m pretty sure it will be a Warco design but Chinese made. Cannot attest to how good it is but Warco sells some nice small stuff so you might inquire.

FWIW, I bought a six-inch rotary table a few years ago. As far as I can tell, it was made somewhere in eastern europe. It had some tight spots and a little backlash in the gears, and the scale engraving was crude. I can"t remember what the price was, but I know it was below $400.00. (Including a set of indexing plates.) I wanted a better one, but the budget was needed for other items. For the fraction of my shop time I need a rotary table, I considered the poor quality, low price workable.

I also bought a 4-inch rotary table from Grizzly a while back with the intent of making it indexable via stepper motor and arduino control, but that project did not work out and the table itself is just too hard to use: Another future project to sort out.

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.

I feel for ya. Went through this same issue years ago. They can be pricey lumps of metal for some reason. I"ve read about some OK Chinese stuff & also some horror stories. Its such a crap shoot if you cant see it in person. If it was only clean out casting grit, repack the grease & tweak a bit that would be fine. But if the gears are cut crappy or platen & surfaces are not ground properly then its an irritating boat anchor because difficult to replicate those components. And RT"s are heavy PITA parts to return weight/shipping wise through online vendors sight unseen. Vertex makes pretty good stuff IMO. Just watch out for the tricky label "like Vertex" brands that are creeping in. Dividing plates... useful for sure really depends on what you see yourself making. The only consideration is if you say no now & years later want them, there"s a chance you might not see the correct set, they can have nuances how they mount. Tailstock - again depends on what you are making. Long skinny things in horizontal mode need rotating support just like a lathe but there you could defer or get away with a clone since they are so adjustable. But sometimes the combo kit deals work out to the accessories being not a lot of extra $$, it all depends.

Alibaba.com offers 30,084 rotary table products. such as carbon steel, high manganese steel, and iron. You can also choose from manufacturing plant, machinery repair shops, and energy & mining. As well as from 1 year, 6 months, and unavailable. And whether rotary table is not available.

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.

* 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.

Eppinger, a toolholder manufacturer, is entering a new market by presenting a range of rotary tables. The company made its first display at EMO Hannover earlier this year. The new rotary tables are available with rotary plate sizes ranging from 160 to 320 mm and are suitable for both initial installation and retrofitting of vertical and horizontal milling machines.

“We have used more than 30 rotary tables of different brands at our production sites for many years,” says managing director Uwe Eppinger. “That’s why we are well aware of the pros and cons of installation, flexible application, maintenance costs and decreasing accuracy.”

Although the existing market is already highly competitive, Eppinger company is venturing into this segment now. “Our rotary tables differ significantly from existing solutions,” says Mr. Eppinger. “They have been used for some time in our own manufacturing, where they gradually replaced the third-party products.”

“We were not always satisfied with the products that previously existed on the market,” he continues. “The reason is that for our own production of tools, wheel gears and gear units, we need rotary tables that can be quickly and precisely positioned, tables which are extremely compact and suitable for fine grinding as well as for rough milling operations. In addition, they should be easily integrated into existing vertical and horizontal machining centers and used there in a flexible way. Since we could not find suitable rotary tables on the market for our specific requirements in this specific combination, we developed them ourselves.”

A distinguishing feature of Eppinger’s rotary tables is the pre-loaded, backlash-free twin-engine drive which is said to enable quick indexing without clamping. An integrated angle sensor on the rotary plate keeps positioning accuracy high, even with changing loads, the company says. Although this principle is already used for larger rotary tables, Eppinger says it found a way to implement it in rotary tables with plate sizes under 320 mm in diameter. Although the angle measuring system integrated into the housing measures the angle directly on the rotary plate and compensates for mechanical interferences, the pre-loaded drive makes it possible to set up a high control loop gain, the company explains. Only in this way is it possible to bring bidirectional positioning into the angular seconds range of precision.

A non-woven porous material with a special coating enables vacuum chucks and tables to hold sheets of metal and other materials more effectively on CNC routing machines. The material, called Vilmill, is used as a substrate between the sheet or plate material to be machined and a suitable vacuum table or vacuum chuck where it is held securely in place by the vacuum.

In addition, since rotary motion is often performed for the purpose of processing, measurement, or some other subsequent operation, the use of rotary tables by themselves is rare.

Rotation mechanisms used in chairs and other equipment are also classified as rotary stages in the broad sense of the term, so they are used not only in manufacturing but also in home applications.

A crossed roller bearing is a bearing structure in which rollers are arranged between the inner and outer rings. The rollers are arranged in a straight row with a 45° contact angle, enabling the back bearing structure of a ball bearing to be realized with a single row, and the structure is capable of receiving loads from multiple directions simultaneously. The rotary table and cross roller bearings can be directly connected, which reduces the number of structural parts.

Since the rotational accuracy of the rotary table is directly related to the accuracy of the rollers, high rotational accuracy can be obtained depending on the accuracy grade of the rollers. In addition, since cross roller bearings have low frictional force and can be operated with light force, micrometer heads can be used in the fine-tuning rotation mechanism to obtain high positioning accuracy.