false rotary table made in china

Drilling involves pipe handling operations in a wellbore, and this in turn requires a false rotary table, a vital cog in the overall success of the operations. At ShalePumps, the need for constant improvement has resulted in an extensive range of precision engineered equipment, of which the false rotary table occupies the limelight.

This hydraulically driven false rotary table is guaranteed to seamlessly engage the tubulars in the wellbore. Pivotal to drilling operations are the sequence of engaging and lowering tubulars into the wellbore. The false rotary table manufactured at our facility is a fine example of harmony between design, materials and precision engineering.

Featuring a mighty load capacity of 1.3 million pounds operating at a maximum speed of 20 rpm, the false rotary table assists the drilling operations in continuous long drawn operations. Pipe handling requires the seamless and sturdy operation of the false rotary table.

ShalePumps, backed by substantive body of experience and knowhow has developed this high performance false rotary table to ably support drilling operations by incorporating a blend of advanced materials and precision engineering. With a guaranteed long life and trouble free run, the ShalePumps false rotary table spins other models out of reckoning.

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.

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.

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GSN 85-05K-SV with table size 85mm gear ratio 1:5 for servo motor. Designed specially for servo motor gearbox for motion control applications. It takes full advantage of the flexibility of the...

GSN130-18K-SV with table size 130mm gear ratio 1:18 for servo motor. Designed specially for servo motor gearbox for motion control applications. It takes full advantage of the flexibility of the...

GSA130-03K-SV with gear ratio 1:3 table size 130mm for servo motor. It could be equipped with right angel gearbox or planetary reducer to increase the gear ratio.

GSN200-18K-OS with table size 200mm gear ratio 1:18 and open loop stepper motor. It retains the ease of use of a stepper motor, while also allowing for highly accurate positioning of large inertia...

GSN 130-18K-CS with table size 130mm gear ratio 1:18 and closed loop stepper motor. It retains the ease of use of a stepper motor, while also allowing for highly accurate positioning of large...

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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.

Over the course of a month, Pequot can run between 600 and 800 active jobs with lot sizes ranging from a couple of parts to thousands of parts. Recently, though, the shop was experiencing poor part surface finishes and inconsistent tolerances on VMCs with rotary tables to enable four-axis machining, two problems that would randomly and inexplicably occur from one batch of parts to the next and sometimes even during the same part run. Pequot would set up a job and run some parts that would be machined to specification. Then, out of the blue, a part would come off the machine out of tolerance or with chatter marks on its surface finish, and tool life would suddenly take a nosedive.

Pequot evaluated all aspects of its process to determine the cause of these problems, including the machine tools, toolholders, cutting tools, workholding devices and part programs. Eventually, the shop realized inconsistent rotary table positioning was the culprit, even though initial inspections of those tables seemed to reveal they were operating properly.

“The inconsistency hindered us from immediately tracing the cause back to the rotary tables,” explains Kevin Spielman, Pequot’s production manager. “When experiencing such a hiccup, we would adjust machining speeds and feeds to compensate, and get a few good parts. Then, unbeknownst to us, the tables would operate correctly, but we’d be running at the wrong machining parameters. This, in turn, also produced bad parts. After a while, we were constantly chasing our tails and second-guessing ourselves when it came to adjusting operational parameters.”

This spurred the shop to replace the tables with pL Lehmann EA510 and EA511 single-spindle units from Exsys/Eppinger. These rotary tables, acquired from local Exsys distributor Hill Industrial Tools, give the shop’s three-axis VMCs more reliable fourth-axis capabilities for part positioning and rotational machining.

“Once we installed the pL Lehmann tables, our inconsistency and rigidity problems vanished,” Mr. Spielman says. “We experienced immediate and further improvements in accuracy, tool life, machining speeds and material removal rates to the point that we reduced part machining cycle times by 25 percent. Plus, we basically eliminated any machine downtime associated with our previous rotary tables. Most importantly, the new tables have increased our machine utilization. We now have the confidence and ability to run our automated milling machines nonstop for lights-out production over night and on weekends.”

Despite their compact design, the pL Lehmann tables are said to offer strong resistance to pullout torque and axial force while providing high levels of clamping torque. In addition, their backlash-free, preloaded gear drive (PGD) technology is said to deliver the high torque common to gear-driven tables and the high rotational speeds common to direct-drive tables, with spindles capable of speeds ranging from 47 to 111 rpm and 90-degree moves in 0.34 second.

The spindles on the standard-model tables are guaranteed to within 5 microns of runout (less than 3 microns for the high-accuracy models). The tables’ ±1 arc-second positioning capability, along with near-zero runout, makes them well-suited for Pequot’s demanding tight-tolerance applications. Steel parts machined on the pL Lehmann tables typically measure approximately 1.125 inches in diameter and 8 inches long; aluminum parts are commonly 5 inches in diameter and 6 inches long.

Mr. Goerges says that with the increasing business Pequot is winning, its goal is to get the most production out of its manufacturing equipment. Automation plays a key role. In fact, the shop refers to this goal as “168,” referring to the number of available hours in one work week. “With the new rotary tables, we’ve increased our machine output and won back massive amounts of production time on our automated VMCs,” he says.