GA-2800M - Ultra Performance Turning Center

Max. Swing Length : Ø 22.83" / 23.62"

Max. Turning Diameter : Ø 13.77" / 19.68"

Max. Turning Length : 8.66" ~ 48.38"

Chuck Size : Ø 8" ~ Ø 15"

Bar Capacity : Ø 2" ~ 4.13"

Spindle Nose : A2-6 / A2-8 / A2-11

Spindle Motor ( cont. / 30min.) : 15 / 20 HP ; 25 / 30 HP

X-axis Travel : 8.07" / 10.23"

Z-axis Travel : 13.77" ~ 48.42"

X / Z Axes Rapids : 787.4 / 944.88 IPM

Turret / Live Tooling Turret Station : 10 / 12 T

CNC Control : FANUC Oi -TF

Machine Weight : 7,720 ~ 15450 lb

Ultra Performance Turning Centers

Engineered to handle heavy-duty turning applications with superb accuracy, the GA series ultra performance turning centers combine extremely powerful high torque motors, super rigid box way constructions, and large diameter servo indexing turrets to bring you The Ultimate Machining Power®. The GA series will help you be more competitive by achieving faster cycle times with heavier cuts, faster machine movements, and allow cutting of tough material efficiently. You’ll also appreciate the reliability and durability that our machines are known for. Plus, with more standard features than any other machine on the market today, many say it’s the best investment they have ever made.

Extremely powerful high-torque spindles deliver 2.5 ~ 4 times the torque output of standard spindles.

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

In order to endure the machine’s high outputs with durability, heavy-duty roller bearings are used to support the spindles and the axes guide ways are super rigid one-piece box ways.

There are a total of 26 models available in the GA series lineup. Use the chart below to pinpoint the model that best suits your application needs.

C: Compact Bed     L: Long Bed     M: Live Tooling & C-axis
*1 Turning length listed here are approximate numbers, individual models may vary. Please see Machine Specications page for details.

The modern 30° slant wedge bed design provides smooth chip disposal and easier operator access without sacrificing machine rigidity.

Larger machining capacities and available live tooling features provide additional production flexibility.

GA series machines ( excluding compact bed C models ) feature a standard programmable base and quill tailstock.

Manual mode quill-jog function allows the quill to be inched forward, which makes it easier to insert the center into the center hole.

Movement of the base and quill in auto mode are controlled by M-codes and thrust pressure is manually adjustable.

Z-axis carriage automatically locks onto the tailstock base and moves it to the desired position with precision accuracy.

Machine rigidity is increased by eliminating the opening required for under-machine-type coolant tanks.

Utilizing unused space, this coolant tank placement allows optimal air circulation for faster heat dispersion and lower coolant temperature, which will help extend coolant life.

Heat escapes directly into the air, not trapped inside the machine; this tremendously improves the machine’s overall accuracy by lowering thermal expansion effects to a minimum.

Coolant tank allows the connection of compressed air to circulate coolant and keep it fresh when machine is not in use.

Less space limitations allow larger 145 L ( 38 gal ) coolant tank capacity and easier maintenance access.

Auto industry manufacturers require machines with compact footprints and rear discharge conveyor systems to streamline their production lines. We offer the GA-2000 series C models to meet this demand.

With the machines placed closer together, operators spend less time walking and are less exhausted, thus, lowering the demand of manpower and increasing efficiency.

Rear discharge conveyor systems allow machines to be placed closer together, thus, requiring less floor space. Furthermore, all machine conveyors can discharge onto a central conveyor, which carries the chips to one location; this saves man power and streamlines the chip removal process.

The standard chip conveyor features adjustable timers that allow the operator to set operation intervals according to the amount of chips generated by the machine. Thus, reducing coolant loss to a minimum.

Super Heavy-duty Construction

The low center of gravity heavy-duty bed and 30° slant wedge saddle design provide a super rigid foundation for the headstock, turret, and tailstock. This creates the rigidity needed to perform super heavy-duty turning and maintaining long-term high precision accuracy. More rigidity also means extended tool life.

Built to withstand years and years of rigorous high production turning ; the heavily ribbed, one-piece thermally balanced bed and casting components are of " MEEHANITE " casting.

By using Finite Element Methods ( FEM ), highly reinforced ribbings are directly cast into the one-piece bed structure. Mechanical rigidity has been increased by more than 30% when compared to conventional designs.

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

All spindle and servo motors, including drives, are FANUC αi series components to ensure peak machining performance and accuracy.

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

Utilizing the latest 3D CAD design software to assist in machine development, and FEM ( Finite Element Methods ) to provide engineering analysis, we are able to create the best designs possible.

GA series head stocks feature even thickness sides, which evenly distribute cutting forces to the machine bed, resulting in exceptional vibration dampening characteristics and forms a stronger structure to handle interrupted and heavy cutting applications. Heat dispensing fins around the headstock evenly dispense heat to reduce deformation, therefore, increasing machining accuracy.

Slide ways are bonded with " Turcite B " to eliminate stick-slip, minimize wear, and maintain long term accuracy. Rapids are 20 m/min. ( 788 IPM ) on X-axis & 24 m/min. ( 945 IPM ) on Z-axis.

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

Extra wide, hardened and precision ground box ways are widely space, and directly cast onto the machine bed and saddle for maximum strength and precision. The box way design also provides the rigidity needed for heavy-duty and interrupted turning applications.

Ultimate Turning Power

The heavy-duty headstock is of one-piece casting reinforced with heat dispensing fins.

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.

GA-2000 series Spindle Output

GA-3000 series Standard Spindle Output

GA-3000 series Optional Gear Box Spindle Output

The 2-speed super heavy-duty gear box incorporates advance mechanical designs. Mated with a 22 kW ( 30 HP ) ( 30min. ) high-torque p-type motor to provide tremendous amount of low-end torque to handle heavy material removal on large diameter parts.

Advanced Turret Technology

The heavy-duty servo indexing turret achieves 0.2 second indexing times for adjacent stations and 0.5 second for stations at the opposite end of the disk. Index movements are single step, without pauses, no matter how many stations are skipped.

210 mm ( 8.27" ) diameter super high precision curvic couplings accurately position the turret disk and 4,000 kg ( 8,800 Ib ) of clamping force ensures abundant turret rigidity for all cutting conditions.

The standard 12-station turret clears 8" diameter work holding devices without interference, even when loaded with tooling at maximum shank size. The optional 10-station turret clears 10" diameter work holding devices without interference, even when loaded with tooling at maximum shank size.

The heavy-duty servo indexing turret achieves 0.2 second indexing times for adjacent stations and 0.5 second for stations at the opposite end of the disk. Index movements are single step, without pauses, no matter how many stations are skipped.

250 mm ( 9.84" ) diameter super high precision curvic couplings accurately position the turret disk and 4,400 kg ( 9,680 Ib ) of clamping force ensures abundant turret rigidity for all cutting conditions.

The standard 12-station turret clears 9.1" diameter work pieces without interference, even when loaded with tooling at maximum shank size. The optional 10-station turret clears 11.3" diameter work pieces without interference, even when loaded with tooling at maximum shank size.

Live Tooling Turrets

Live tooling capabilities on the GA series allows a work piece to be turned, milled, drilled and tapped without moving it to another machine.

The 12-station YAMA SEIKI live tooling turret offers 12 stations available for live tooling ( live tooling tools rotate in working position only ) and features a non-lifting turret disk.

YAMA SEIKI live tooling turret utilizes the latest servo indexing technology to achieve 0.2 second indexing times for adjacent stations and 0.5 second for stations at the opposite end of the disk.

With the latest technology, live tooling is driven by an AC servo motor to provide ample power, in the form of torque. Now, even the toughest of jobs may be tackled without a sweat.

Ultimate C-axis Spindle

The Cf-axis and disk brake system available on the GA series provides the most rigid and powerful type of C-axis on the market today. In Cf-axis mode, a servo motor is engaged and drives the rotation of the spindle, engagement time is less than 2 seconds.

Working with the live tooling turret, the Cf-axis and disk brake system enables the machine to perform 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 33,000,000 pulses per spindle rotation and 480 Nm ( 354 lb-ft ) of torque, surface finishes are much superior than Cs-axis ( driven by spindle motor ) equipped machines. Plus, dynamic accuracy is within ±0.02° even under heavy cutting loads.

Live Tooling & Special Tool Holders

YAMA SEIKI dual-face turning holder allow both sides of a disk-type work piece to be machined at the same time. Tool holder automatically spreads open for retracting tooling to avoid damage to the turned surfaces.

Machining time is reduced by over 50%.

No unwanted turning marks.

Excellent surface quality by using a viper geometry ground insert.

Reduced vibration & increased parallelism accuracy utilizing symmetrical cutting pressure.

Hydraulical movement with adjustable block.

Setups are easy with the integration of both hydraulic and spring activation.

Machining Performance

Enhanced Automations