ganro rotary table for sale

Manufacturers across the globe are always looking for reliable workholding devices to accommodate their manufacturing indexing and rotating requirements. CNC Indexing & Feeding Technologies has been proud to represent the complete Ganro Industrial Corp. (Golden Sun) product line of workholding rotary tables and indexers. Ganro has been producing a wide variety of workholding products to accommodate manufacturers for over 30 years. To help a company decide which table is best for its applications, it is beneficial to understand the proper use and capability of each workholding device. CNC Indexing and Feeding Technologies offers various Ganro workholding products.

Standard Rotary Tables: The sizes range from 120mm (4.72") to 800mm (31.49") in faceplate diameter and can be used as a full rotating axis incorporated into a machine"s control or as indexers with Ganro"s M-Mate AC servo controller. These rotary tables and indexers are all capable of being mounted in both the vertical and horizontal positions and have large thru-holes to give manufacturers maximum flexibility.

Large rotary tables: The large rotary tables are available in a range of 1000mm (40") to 2500mm (98") in faceplate diameter. They can be used as a full rotating axis incorporated into a machine"s control or as indexers with Ganro"s M-Mate AC servo controller. These rotary tables and indexers are all capable of being mounted in both the vertical and horizontal positions.

Rear Motor Mount: Ganro manufactures two of the most popular sized rotary tables with a rear mounted motor for smaller vertical machining centers. The rear motor mount rotary table design is available in the standard 170mm (6.69") and 250mm (9.84") faceplate diameters. As with other Ganro rotary tables, they can be used as a full rotating axis incorporated into a machine"s control or as an indexer with Ganro"s M-Mate AC servo controller.

CNC Indexing offers three types of Ganro standard rotary tables to accommodate a wide range of 4- and 5-axis manufacturing requirements. The standard tilt rotary table is a trunnion design with faceplate diameters ranging from 320mm (12.59") to 800mm (31.49"). This style is created to give manufacturers ample room for workholding and workpiece while providing clearance for the machine"s spindle and tool.

Compact Tilt: The compact tilt rotary table design comes in faceplate sizes of 150mm (5.90"), 200mm (7.87") and 250mm (9.84") and is ideal for smaller machining centers and smaller workpieces.

Manual Tilt: The manual tilt table is designed with a full 4th axis (rotating axis) and a manual tilting axis. It is available in sizes from 200mm (7.87") to 630mm (24.80") and is ideal if a tilting axis is only occasionally required.

Horizontal Rotary Table: This rotary table design is available with table tops ranging from 400mm (15.74") to 2500mm (98.42") square. Ganro"s horizontal CNC rotary tables can be used in various areas of manufacturing but are ideal for horizontal boring mill applications.

The HR Series design can be used as a full rotating axis incorporated into a machine"s control or as an indexer with Ganro"s M-Mate AC servo controller. They are designed for horizontal mounting only and offer high weight capacities for large workpieces.

Horizontal Index Tables: CNC Indexing offers two types of Ganro horizontal index tables for both manual and automated manufacturing processes. Both series of precision horizontal index tables use a two piece Hirth coupling design that provides superior indexing accuracy while maintaining high rigidity during heavy cutting.

CNC Index Table: The CNC Index Tables are clamped and unclamped with hydraulics and are designed to be incorporated into a machine"s CNC control or operated with Ganro"s M-Mate AC servo control system.

Manual Index Tables: The Manual Index Tables are clamped and unclamped pneumatically or hydraulically. Once unclamped the series is manually indexed to the desired degree and securely clamped into position.

Face Gear Rotary Tables: The Face Gear Rotary Tables are manufactured with a three piece Hirth coupling design to avoid lifting during rotation. The use of a Hirth coupling allows for the mounting of heavy loads while offering high rigidity and high accuracy. These tables are primarily used in applications incorporating a strong tailstock and a tombstone or fixture plate. It can be integrated into a machine"s control or operated through Ganro"s AC servo controller.

The index tables are available in four faceplate sizes (250mm, 320mm, 400mm and 500mm). Ganro rotary tables can provide a solution for rotating and indexing small workpieces to large workpieces, for vertical and horizontal applications, for 4-axis and 5-axis work and for manual and automated applications. Ganro products give manufacturers the capability of improving the manufacturing process by accessing multiple workpiece faces in one clamping. This improves workpiece accuracy and reduces manufacturing cycle times.

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We are offering cnc tilting rotary table. As one of the leading cnc rotary table manufacturers, we provide cnc tilting rotary table with durable quality and competitive price. Features: brand new second generation model. new invented powerful clamping device will strengthen the clamping ability of tilting axis. compact design is suitable for limited room. using axialradial bearings, they can allow heavy loads and are suitable for heavy cutting. The runout of axial and surface flatness is decreased, and higher accuracy is acquired.

Job shops may believe that all CNC rotary and index tables are essentially alike. As a result, they often base their selection on price and hope they can use their machining creativity to maximize a rotary or index table.

However, to expand the capabilities of their machine tools when purchasing new ones or retrofitting existing equipment, considering the quality of a table’s sealing, braking and bearing systems and how those systems impact a shop’s current and projected applications can pay big dividends down the road. Shops are also wise to consider the effectiveness of a cable management system—which ensures a rotary table is always connected to the machine without operator intervention and extends connector life—when palletizing tables.

“The initial quality of the rotary table makes a big difference,” said Lee Flick, national sales manager for HPI-Pioneer, “especially at job shops.” The Elk Grove Village, Ill., company supplies CNC rotary and index tables from Yukiwa Seiko Inc., Japan.

Predictably, many end users—especially shops on limited budgets—push the limits of a rotary table’s weight capacity and capability. “Some of our customers will put a car on a little table and try to turn it,” Flick quipped. But by specifying the correct rotary table for the job, shops can extend equipment life while reducing maintenance issues and continuing to machine high-quality parts.

After 2 years of operation, the inside of a Yukiwa rotary table (left) with an automatic air-purge system and a competitor’s table without a purge system.

A table axis’ lack of durability and inadequate clamping power can cause out-of-tolerance features and rough surface finishes. One solution is a dual-bearing system that supports the table on the front and rear with large bearings, according to Flick. Even with an overhanging weight load, this design prevents the table from leaning, he added.

One of the key factors that determine the life span of a rotary table is how well it is sealed against potential contaminants, such as metalworking fluids. Flick noted the most common rotary table service is repairing electronics damage caused by coolant infiltration. “Within 20 years I believe the market will be dry cutting,” he said. “But as long as coolants are involved, sealing is extremely critical.”

Flick indicated that there are three basic sealing arrangements: sealing just the motor cavity, sealing the entire table and sealing the table and incorporating an automatic-purge system similar to check-valve pressure on an airplane. “You pressurize the cabin and if you were to get a leak, it blows outwards,” he said, adding that a rotary table with that type of seal typically lasts twice as long as one that doesn’t, whether it’s an entry-level or higher quality table.

HPI-Pioneer President Nobu Kiriyama explained that the Yukiwa air-purge system uses the 70-psi shop air that also supplies a table’s braking system and enables a table to effectively function when submerged for EDMing. For those applications, an optional nickel-plating is appropriate when the table is submerged in water-based dielectric fluid.

Of course, chips, swarf and other debris produced during cutting can abrade any seal material and provide a passageway for contaminants into a table’s inner mechanisms. Therefore, John Arnestad, tooling product manager for Koma Precision Inc., recommends against aiming a high-pressure coolant line at a seal or an area where a seal is located to reduce that risk. The East Windsor, Conn., company supplies rotary tables from Tsudakoma Corp., Japan, which have seals directly behind the faceplate. The tables also have a metal cover that shields the main seals to decrease the chance of debris abrasion.

For high-pressure coolant applications, Rotec Tools Ltd., Millwood, N.Y., recommends a labyrinth seal on the rotary table. Rotec distributes rotary tables from Peter Lehmann AG, Switzerland. Ivo Straessle, Rotec president, noted the air-supported labyrinth seal attaches to the spindle nose of the table, extending the standard spindle seal, and creates an air cushion underneath the seal to keep coolant out. “We prefer oil-based over water-based coolants because they’re not so aggressive on the rotary tables,” Straessle said. “Many water-based coolants attack seals, cables and electrical components.”

In addition, Lehmann rotary tables have an air-purge seal on the motor housing, and the gear housing has a positive oil pressure at all times. “That makes it very difficult for debris or coolant to penetrate the seal system from the outside,” Straessle said.

To ensure longevity of the rotary table and its sealing system, pressure is reduced to the internal components of the pressurization system during rotation on most of the table models offered by L.C.M. Srl, Italy, said Mike Bickham, president of distributor ITI Tooling Co. Inc., Ramsey, N.J. Then, the pressure increases when the table reaches the preprogrammed working positions.

Cutaway of a Lehmann rotary table: 1) The clamping ring applies 360° equal clamping force on the rotary axis; 2) the rotary axis; 3) the preloaded radial and axial needle bearings; 4) the gear train; and 5) the standard spindle seal, which can be extended with a labyrinth seal for high-pressure coolant application.

Unless it’s an older table, coolant infiltration behind the rotary table seals isn’t an issue in 99 percent of machining applications, according to Jamie Schwarz, national sales manager for CNC Indexing & Feeding Technologies, Mason, Ohio, which offers Taiwanese-made Ganro rotary tables. A combination of oil seals, O-ring seals and silicone caulking keeps contaminants out of the tables’ inner workings, and the company offers an air-purge system as an option.

When coolant penetrates a rotary table, it can short out a servomotor, and fine chips can wreak wear-related havoc on the brake, worm wheel, worm shaft and other parts. “That can get expensive when you start replacing internal components that are important to the table’s accuracy and repeatability,” Schwarz said.

Pressure also comes into play when selecting the appropriate braking system for a rotary table. According to HPI- Pioneer’s Flick, two basic variations exist: a disc brake system and a hydraulic version that provides higher braking pressure than a disc brake. Although hydraulic systems are prevalent, he pointed out that the company offers models with the less-typical air-over-hydraulic booster inside the table’s motor cover, eliminating the need for a hydraulic pump or other external hydraulic supply. Instead, 70-psi shop air does the trick. This is because the table clamp mounted inside the air-hydro structure boosts the hydraulic pressure and achieves higher clamping power simply by providing air pressure. (See image below.)

“The higher the braking pressure, the more aggressive machining you can perform on the rotary table,” Flick said. “Hydraulic boosters are becoming more common because people want to machine harder and harder on the table.”

He added that there’s no angular pressure on any braking system when using a rotary table to cut on-center, but the type of system makes a significant difference when machining off-center because the pressure created on the cutting location increases based on its distance from the center. Hydraulic systems permit more aggressive cuts, even when machining farther out on the table.

The heavy-duty, zero-backlash braking systems on the rotary tables from ITI Tooling can use hydraulic pressure up to 870 psi, according to Bickham, but 580 psi is more typical. In addition, the tables can use an air supply together with an air-over-oil intensifier, which provides benefits because shop air is generally more readily available and is restricted to a safer pressure than a hydraulic system. Bickham added that whether it’s an air- or a hydraulic-actuated brake, the brake operates in the same manner by expanding a 360° pressurized sleeve that wraps around the table’s center axle, holding it rigidly in place.

Cost considerations can play a prominent role when selecting a rotary table’s braking system. The disc brake is the most popular type because repairs are fairly inexpensive, according to CNC Indexing’s Schwarz. The repair is usually performed on tables 10 years and older used for heavy machining, he said. “We can get the repair done within a day for a few hundred dollars.”

With the air-over-hydraulic brake system in Yukiwa’s rotary tables, the increased hydraulic pressure can achieve stronger clamping power by providing air pressure.

Arnestad indicated that Koma offers several braking system options. Called the RNE series table, the pneumatic, dual-disc system is the most economical, while offering good accuracy and a good torque drive, he noted. The mid-range RNA series table has a dual-taper clamping system that uses a pressure intensifier, where a ring of ball bearings are captured between the clamping ring and the piston.

“The piston has an angular feature on it, as well as an angled member inside the braking system so, as the piston moves forward, it displaces that ring of ball bearings and triples the clamping force,” Arnestad said. This enables taking heavier off-center cuts without the fear of the rotary faceplate turning under force.

Arnestad added that the hydraulic, dual-disc clamping system, called the RBA series table, is the company’s most robust. “That’s targeted for high-volume production,” he said, “where they need to hold very close tolerances and want to machine at the fastest rate possible.”

According to Rotec’s Straessle, Leh-mann rotary tables have the same braking system for any application, using a built-in air-over-oil intensifier. This booster coverts 90-psi shop air into more than 4,000 psi of hydraulic pressure, he added, and a clamping ring equally applies 360° clamping force to the rotary axis. “A high clamping force allows high feed rates and high workpiece accuracy.”

End users can also increase machining parameters when a rotary table’s bearing configuration enhances table rigidity. For example, preloaded axial and radial needle bearings in front of the table next to the spindle nose and preloaded axial needle bearings in the rear of the spindle (all inside the gear housing) provide a high level of rigidity, Straessle explained. Preloading eliminates the undesirable “give” for the bearings in the axial and radial directions. “This design allows the customer to work with heavy workpieces and, at the same time, reduces overall vibration,” he said.

According to Arnestad, a cross-roller bearing construction provides the best rotary table support. “It gives better stiffness and less runout than, say, tapered roller bearings, which have a chance of losing their preload over time,” he said.

Yukiwa rotary tables from HPI-Pioneer have a dual-bearing system, where two sets of bearings at both ends of the body provide triple-contact support and the largest angular contact bearing is underneath the table face to enhance bearing support.

In terms of runout, HPI-Pioneer’s Kiriyama noted the bearings in Yukiwa’s rotary tables provide a 0.0001" runout and are the same grade as the ones machine tool builders use for their spindles. According to the company, the tables have a dual-bearing system, where two sets of bearings at both ends of the body provide triple-contact support, and the largest angular contact bearing is underneath the table face to maximize bearing support.

HPI-Pioneer repairs and replaces worn bearings from its rotary tables, as well as from its competitors. “A good table will go 5 to 10 years before it needs work, just like a machine,” Flick said. “With a low-end table, you’re doing it annually. It’s that dramatic of a difference.”

Similar to a braking system, a high-quality bearing configuration effectively supports the workpiece load and machining pressure in the axial and radial directions. This proves beneficial when machining on a rotary table that’s not adequately matched to the application. “Everyone wants to buy the least expensive table they can and push it to its limits rather than going the next size up,” said CNC Indexing’s Schwarz.

When high-volume manufacturers and those performing lights-out machining use rotary tables, they often palletize the tables. In this scenario, the main consideration is the cable management system, which enables a palletized table to shuttle in and out of the machine tool without disconnecting cables while keeping them clear of the machining process, according to Schwarz. It might involve running the cables through the middle of the pallet to some sort of track system or incorporating a spring-loaded arrangement that hangs from the upper sheet metal in a machine and allows cables to extend and retract.

Most end users are quite opposed to having to repeatedly plug in and unplug a rotary table, he said. As a result, the role of a cable management system, which machine tool builders and third-party installation companies provide, is critical.

Koma’s Arnestad added that a cable management system ensures a rotary table is always connected to the machine without operator intervention, which extends connector life. “If you don’t have good cable management, the connections can fail due to abrasion or having the cables flex too much,” he said. “How many times can you plug and unplug a multiple-pin connection before somebody gets a chip underneath the unit, tries to force it on and it leaks and you have problems?”

Going cheap across the board with rotary tables pays initial dividends, but part manufacturers that skimp on quality may miss enhancing the capabilities of their machine tools—even entry-level ones. “If you put the right options on your rotary table,” Frick said, “you can make an inexpensive machine perform as well as a midrange machine.”

Because they don’t have gears and gear-related issues such as backlash, direct-drive rotary tables were expected to eventually replace worm gear-driven ones. For example, CTE’s April 2004 cover story stated, “Whatever the use, more direct-drive NC rotary tables will be purchased in the future, supplanting gear-driven units. These types of tables don’t have a gearbox, thereby eliminating the need to replace worm gears and belts, and are directly driven by the motor.”

That expectation didn’t quite materialize. Although they are quite accurate and rotate considerably faster than gear-driven rotary tables, reaching 250 rpm and higher compared to less than 50 rpm for a standard conventional table, direct-drive rotary tables lack the torque required for machining heavy parts and difficult-to-cut workpiece materials.

Therefore, the primary applications for direct-drive tables are high-volume ones that involve small, lightweight parts and light machining loads, according to Lee Flick at HPI-Pioneer, which offers direct-drive tables. In addition, the motor is essentially the brake. “To get the rpms, you give up torque and braking pressure,” Flick said.

HPI-Pioneer’s Nobu Kiriyama added that rotary table manufacturers have access to the same motors from motor manufacturers, which provide similar motor configurations and specifications. “Then, the various rotary table manufacturers are mostly assembling components and it’s harder to distinguish themselves,” he said. “Direct-drive technology is still evolving.”

Damaged direct-drive tables are also more costly to repair than gear-driven ones, because the components are more expensive than ones for standard servomotors, which can be rewound, said John Arnestad of Koma Precision Inc. “And if you get contamination inside a direct-drive rotary table, the motor is shot and the rotary table needs to be replaced.” Koma offers 5"- to 25"-dia. direct-drive tables.

Ganro also offers a direct-drive table, noted Jamie Schwarz of CNC Indexing & Feeding Technologies, but end users often view them as cost-prohibitive because direct-drive motors are expensive. “We quote it and then the customer says, ‘For that additional cost I think I can live with the standard table I have.’ ”

However, not all suppliers have a less-than-stellar outlook on direct-drive technology. ITI Tooling Co. Inc.’s Mike Bickham emphasized that for L.C.M.’s high-speed, torque-motor-driven tables, the company designs and manufactures many of the direct-drive motors it uses. He added that special direct-drive tables can be ordered that provide enhanced torque and, if needed, a wider range of speed. “There’s tremendous holding power for heavy-duty machining because the motor can be used as the brake,” Bickman said.

Employing servo motor and hydraulic braking system for rigid clamping during machining, HR-3030 offers 153.75 in. dia table swing, 0.001° min indexing increments, and 110,230 lb max work load capacity. Design can be used as full rotating axis incorporated into machine"s control or as indexer with M-Mate AC servo controller. Built for horizontal mounting, machine features double lead worm shaft and worm wheel system for precision and minimal backlash.

Mason, Ohio – Ganro Industrial Corporation, formally known as Golden Sun Industrial, has made significant specification improvements to its horizontal rotary table series including the new HR-3030, which offers a new larger size table top.

The new HR-3030 CNC horizontal rotary table has a table top dimension of 3000mm (118.11”), 3905mm (153.75”) table swing diameter, minimum indexing increments of 0.001°, and a maximum work load capacity of 50,000 kg. or 110,230 lbs.

Changes to each of the current horizontal CNC rotary tables include upgrades to more powerful servo motors and stronger clamping torque with a newly designed hydraulic braking system.  Also improved are work load capacities and additional built-in net weight for rigidity.

The HR Series is available with table tops ranging from 400mm (15.74”) to 3000mm (118.11”) square. Ganro’s horizontal CNC rotary tables can be used in various areas of manufacturing but are ideal for horizontal boring mill applications. The HR Series design can be used as a full rotating axis incorporated into a machine’s control or as an indexer with Ganro’s M-Mate AC servo controller. They are designed for horizontal mounting only and offer high weight capacities for large workpieces. The HR Series rotary tables use a hydraulic brake system to insure rigid clamping during machining. All Ganro horizontal CNC rotary tables and indexers use Ganro’s core technology of a double lead worm shaft and worm wheel system for high precision and reduced backlash. Ganro rotary tables are assembled using cross cylindrical roller bearings with high rotation accuracy capable of bearing heavy loads in every direction.

CNC Indexing & Feeding Technologies is the exclusive importer/reseller of the complete line of Ganro products which includes horizontal and vertical rotary tables, indexers, tilt rotary tables and associated accessories.  CNC Indexing stocks the most popular Ganro models, accessories and parts at their Mason, OH location.  In addition, full installation and repair services are offered. CNC Indexing also produces high pressure coolant systems and imports bar feeders and oil skimmers.  You can obtain more information on the products offered by CNC Indexing & Feeding Technologies on the internet at www.cncindexing.com or by calling 513-770-4200.

AS a result, GANRO’s R&D team works side-by-side with onsite operators to ensure the manufacture of every single part including the table assembly of the rotary tables. As explained by Sales Department Representative Eric Kuo “Even a small screw will decide if a machine center can achieve the most cost-effective function.”

Mr. Kuo: Our index tables are very important for multi-face machining, and for five-axis machine centers, especially on the ultra-precision machining. With the skilled strength of the 4th axis or the 5th axis installed on either existing production lines or machine centers, the targeted cutting processes is thus possible. In Taiwan, there are many index table suppliers gathering in the greater Taichung metalworking supply chain, offering both Taiwanese and foreign order requests, but we are different from them.

We have survived for nearly four decades, and over the years many rotary table makers established their businesses. I am confident that, GANRO, being the oldest table manufacturer in Taiwan holds the most advanced technology and solid experience in producing indexing tables. We make tables for machine tool suppliers and also to end users who have established production lines already, and also to those with urgent need of additional rotary tables for upgrading their existing production lines. In the ASEAN region, our rotary tables are purchased by many users from the automotive supplier chain for machining automotive parts with specific processing demands. In Mainland China, we assist many 3C suppliers in making high- precision small components because we are capable upgrading their manufacturing lines with attention to detail. We can help not only in terms of tables, but also production line planning.

In the European region, we also sell our rotary tables to suppliers in the automotive and aerospace sectors. With the many experiences accumulated through those cooperation, we are able to assist various production lines with their tables and technology.

Mr. Kuo: The GANRO TR-s series CNC tilting rotary table is a good example. This is sold to Japanese automotive manufacturers who have factories in Thailand and Indonesia. We support their existing machineries at their production lines to meet the latest order requests.

The TR-s series succeeded in helping ASEAN users smoothen manufacture processes in many factories. The maximal workload of TR-s series is of 200 kg. The repeatability (sec.) on TR-120S type is 8’’ (unidirectional) and 16’’ (bidirectional), promising rigid precision. On TR-320S type, the repeatability is 4’’ (unidirectional) and 8’’ (bidirectional). This table product enhances the efficiency of production lines by the many special features.

In addition, we are good at supporting machine tool manufacturers in the 5th axis construction. Our AR series CNC horizontal pallet rotary table is famous in the machine tool sector. The product adopts double lead worm shaft design as the crucial transmission mechanism. The double lead worm shafts have different lea, and lead angles on the right and left sides. The tooth space of our double lead worm shaft is between 0.005 mm and 0.01 mm, which is a high standard and we are the supplier who offer this accuracy as ordinary standard. The specification pushes the limit of micro-backlash. The max work load of AR series reaches to 650 kg, and the radial moment is 500 Kgf•m.

Mr. Kuo: Yes indeed. The ASEAN is a place where our products fit into their growing industrial demands. As the region now also encounters labor issues, GANRO’s rotary tables can help deal with the automation needs. We can help people dealing with difficult processing procedures by planning their existing production lines of course with our long-term experience in table making technology. I’m positive that in the next ten years, we will have a good business.

Ganro Industrial Corporation, formally known as Golden Sun Industrial, has introduced its new DR Series model of rotary tables and indexers. CNC Indexing & Feeding Technologies imports and sells Ganro products.

Ganro"s new series of rotary tables and indexers range in faceplate diameter size from 120 mm (4.72") to 2,500 mm (98.42"). "The wide range of available sizes accommodates the majority of manufacturer"s requirements," said a CNC Indexing spokesperson. All DR Series rotary tables can be utilized in the vertical or horizontal position to increase manufacturing flexibility.

The DR Series features a more compact base that uses less of the machining envelope, allowing more machine table space for workpieces and additional workholding equipment. All Ganro rotary tables are now standard with larger center thru-holes to accommodate larger workpieces.

CNC Indexing & Feeding Technologies is the exclusive importer/reseller of the complete line of Ganro products that includes horizontal and vertical rotary tables, indexers, tilt rotary tables and associated accessories. CNC Indexing stocks the most popular Ganro models, accessories and parts at their Mason, OH, location. In addition, full installation and repair services are offered.

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