GS-2000 - Maximum Performance Turning Center

Max. swing diameter : Ø 24.79"

Max. turning diameter : Ø 22.44"

Max. turning length : 29.37" ~ 60.23"

Chuck size : Ø 8" / 10" / 12"

Bar capacity : Ø 2.00" ~ 4.13"

Spindle nose: A2-6 / A2-8 / A2-22

Spindle motor output : 20 / 25 HP ; 25 / 30 HP

( cont. / 30 min. )

X-axis travel : 11.81"

Y-axis travel : ± 1.96"

Z-axis travel : 30.69" / 60.23"

X / Y / Z axes rapids : 1,180 / 1,180 / 393 IPM

Maximum Performance Turning Center

With the latest machine tools technology and powerful turning performance, YAMA SEIKI brings you the new GS-2000 / GS-3000 series maximum performance CNC turning center. Using 2 different lengths of beds and 5 different sizes of bar capacities combined with a powerful spindle, high speed servo indexing turret and high rigidity structure design, the GS-2000 / GS-3000 series becomes the best choice of machine tools for the new generation. Additionally, it can be equipped with an optional precision built-in type spindle, high torque gear type spindle, or a live tooling turret, Y-axis and sub-spindle which can accomplish mutli-tasking applications. With the perfect quality and complete tasking capabilities, the GS-2000 / GS-3000 series can easily various needs of today and tomorrow.

The modern 30° slant-bed design ensures outstanding structural rigidity and heavy duty cutting ability.

All standard turrets and live tooling turrets are self-developed and assembled by YAMA SEIKI which ensures high quality of the key components and allows the machine to provide optimal performance.

Spindle is driven by the wide-range FANUC αP series motor which can take heavier cuts in low RPM ranges.

Extra large Z-axis servo motors provide the thrust needed to efficiently drill big diameter holes.

Coolant system with roll-out coolant tank and high-pressure coolant pump.

*1 Maximum turning length may vary, based on the model chosen.

Maximum Strength Structure

By using Finite Element Methods ( FEM ), optimal reinforce ribbings are directly cast into the one-piece bed structure. Mechanical rigidity has been increased by more than 30% when compared to conventional designs. The GS-2000 / GS-3000 series is capable of performing super heavy-duty turing and maintain long-term super high-precision accuracy. More rigidity also means extended tool life.

Major structural components have been combined into one solid platform. The low center of gravity 30˚ slant-bed design provides the most rigid foundation possible for the headstock, turret, and tailstock.

Built to endure years and years of rigorous high production turning, the heavily ribbed, one-piece thermally balanced bed and casting components are of FC35-Meehanit casting. FC35 grade cast iron is capable of withstanding much greater stress without deforming and provides maximum vibration dampening, which result in a machine that will outlast and outperform the competition.

X and Z axes are driven by over-sized FANUC αi series absolute AC servo motors, providing tremendous thrust outputs with faster acceleration and deceleration. Absolute encoder technology saves time and money by eliminating the use of limit switches, thus, eliminating referencing axes to home positions and replacing broken limit switches.

Contact surfaces of all slides, headstock, turret, tailstock, and ball screw bearing housings with the machine bed are precision hand scraped to provide maximum assembly precision, structural rigidity, and load distribution.

Extra wide hardened and ground box ways are directly formed onto the machine bed and saddle during the casting process. They are precision machine and widely spaced for maximum strength. The box way design also provides the rigidity needed for heavy cutting and interrupted turning applications.

C3 class hardened and precision ground ball screws ensure the highest accuracy and durability possible. Plus, pretension on all axes minimizes thermal distortion.

High Performance Spindle System

P4 grade ( Class 7 ) super-high precision bearings are directly assembled for maximum level of support and precision. Bearing configuration is designed for super heavy-duty cutting with ultra-smooth performance and long term durability with a higher level of accuracy.

The A/C, constant output, wide-range FANUC αP series motor can generate twice the torque output of standard motors. This double bind motor is designed to reach full output at 1/2 the RPM of standard motors, providing the ability to take heavier cuts in the lower RPM ranges.

The super large headstock is heavily ribbed and of one-piece casting. The contact surfaces between the headstock and bed are greatly increased which provides greater rigidity of the headstock and efficiently dampens vibration, therefore, increasing machining accuracy.

The optional built-in type spindle can provide 100% motor output. It can decrease vibration generated from the spindle while spinning, thus increasing the life span of the spindle and increasing machining accuracy.

The built-in spindle is covered with a cooling water jacket and equipped with an external oil cooler which efficiently reduces thermal expansion and ensures long term machining accuracy.

The optional oil bath German made ZF 2-step gear box provides maximum torque up to 1,200 Nm ( 885 ft-lb ), which can easily meet with heavy cutting requirements.

Advanced Turret Technology

YAMA SEIKI all series turrets are equipped with Japan made curvic couplings which is precision assembled under A/C controlled laboratory which ensures powerful cutting performance, outstanding quality and long life span.

The heavy-duty servo indexing turret achieves 0.3 second indexing times for adjacent stations and 0.8 second for stations at the opposite end of the disk. Index movements are single step, without pauses, no matter how many stations are skipped.

The large diameter super high precision curvic couplings accurately position the turret disk and the powerful clamping force ensures abundant turret rigidity for all cutting conditions.

The curvic coupling provides self-centering, self-cleaning and large contact surface advantages compared to conventional curvic couplings.

Live Tooling Turret

Live tooling and C-axis control capabilities on the GS-2000 or GS-3000 series allows the machine to perform multiple tasks on a work piece, such as turning, milling, drilling and tapping. It eliminates manpower and cycle time, while reducing accuracy lost, which will occur if the part is moved from machine to machine.

The live tooling turret is mated with a 4.5 kW ( 6 HP ) motor and driven by a transmission mechanism to provide tremendous amount of horsepower which can easily accomplish difficult tasks such as milling, drilling and tapping.

The 12-station live tooling turret offers 12 stations available for live tooling, live tools rotate in working position only to reduce power loss and heat.

Ultimate C-axis Spindle

The Cf-axis and disk brake system available on the GS-2000 / GS-3000 series provides the most rigid and powerful type of C-axis on the market today.

Working with the live tooling turret, the Cf-axis and disk brake system enables the machine to perform multiple tasks, such as drilling, tapping, and milling operations, including cylindrical and polar coordinate interpolations ( resembling a 4th-axis rotary table on a machining center ).

With the FANUC servo motor generating an ultra high resolution of 120 million pulses per spindle rotation and 480 Nm ( 350 Nm ) of torque ( cont. ), machined surface finishes can reach to a higher accuracy level. Plus, dynamic accuracy is within ±0.02°.

Y-axis Machining Capability

The Y-axis combined with live tooling turret, C-axis and high torque live toolings enhances multi-tasking live tooling capabilities and improves various machining precision. High precision grooving and X-axis off-center drilling are enabled.

With an abundant amount of Y-axis travel, 100 mm = ± 50 mm ( 3.93" = ± 1.96" ), a wide variety of parts may be efficiently machined.

The Y-axis is adopted with low gravity, wide span box way design to ensure outstanding machining rigidity.

On Y-axis equipped machines, the turret is mounted on a secondary 30 degrees wedge saddle on top of the X-axis slide. Both X & Y axes have extra wide hardened and ground box ways, which are directly formed onto the saddles during the casting process. They are precision machined and widely spaced for maximum strength.

Grooving with Y-axis control produces grooves with higher accuracy.

Back-end Machining Capability

With the optional sub-spindle, the working process is done-in-one from input to output, without having to manually flip over the work piece, thus increasing productivity and machining accuracy.

The B-axis movement of the sub-spindle is adopted with roller linear guideway design, to provide high rigidity, precision and fast movement ( 30 m/min. ( 1,180 IPM ) ) performance.

The sub-spindle can also be equipped with the C-axis function ( same as the main spindle ), to allow the contour positioning accuracy reach up to 0.001°. It can also accomplish back-end milling, drilling and tapping applications when combined with a live tooling turret.

Ultimate Turning Power

Workpiece Material : S45C Medium Carbon Steel     Test Model : GS-3600M