Cylindrical grinding machine X-2540LM

workpiecehorizontalCNC

INTRODUCTION
TOPKING's LM Series CNC cylindrical grinder features a linear motor-driven cross-slide, enhancing machine rigidity and stability while reducing cycle times to meet the demands of high-efficiency, high-precision grinding. This series is ideal for machining high-accuracy components such as hydraulic valve parts, automotive components, and aerospace parts, delivering superior precision while optimizing productivity and process stability.

The LM Series also offers an optional synchronous workhead and tailstock with a dual-center synchronous drive system and an extendable spindle. This design streamlines workholding, minimizes fixture complexity, and eliminates the need for additional drive considerations. The extendable spindle increases the grinding range to accommodate various workpiece sizes, enhancing flexibility and maximizing machining efficiency.

CAPACITY
Swing Over Table: Ø270 mm
Distance Between Centers: 400 mm
Max. Grinding Dia.: Ø250 mm
Max. Grinding Length: 400 mm

MACHINE FEATURE
USER FRIENDLY OPERATION SYSTEM
The built-in advanced CNC control system is equipped with a GUI. The operator can divide the complex component into several grinding processes through graphic guidance, simplifying process editing of grinding and dressing in a numerical way. No complicated programming (G code, M code) is required, providing a convenient operating environment.

RIGID MACHINE BASE
■ High rigidity machine base made of Meehanite cast iron through annealing and aging treatment.
■ Slideway through high-frequency hardening and precision grinding process. Machine base with stable material and strengthened construction for deformation-free and outstanding wear resistance.

WORK TABLE
■ The work table is permanently bolted to the machine. The cross slide design reduces travels, improving working speed and precision stability.

CROSS-SLIDER DESIGN
■ X axis and Z axis are designed as cross-slider to reduce machine space.
■ Two axes covered by enclosed telescopic covers to protect transmission structure and prevent contamination from grinding debris and coolant.

X-AXIS LINEAR MOTOR DRIVE
Featuring a cross-slide structure with a linear motor and high-precision linear guideways, this design effectively eliminates backlash. The standard X-axis full-closed loop control with an optical scale ensures fast and precise feed movements, achieving rapid traverse speeds up to 15,000 mm/min. With a non-contact design using coils and permanent magnets, the linear motor minimizes wear and reduces maintenance needs and replacement costs.

CARTRIDGE-TYPE GRINDING WHEEL SPINDLE
The cartridge-type grinding wheel spindle ensures stable contact, reducing vibration and wear-induced deviation for high-precision machining. Its design allows for easy wheel replacement and adapts to various grinding needs, enhancing efficiency and quality.

DUAL SYNCHRONOUS WORK SPINDLES (OPT.)
The LM Series offers an optional dual-drive workhead and tailstock with a dual-center synchronous drive system and an extendable spindle. This simplifies workpiece clamping, reduces fixture complexity, and eliminates the need for additional drive considerations. The extendable spindle overcomes tailstock travel limitations, allowing quick adaptation to different workpiece lengths and minimizing tailstock adjustments during changes.

AUTOMATION APPLICATION
It can be integrated with external automation systems and includes online measurement and acoustic collision prevention for real-time feedback and data correction. The machine, powered by Kingge Technology's operating system, ensures stable high-quality output and reduces setup and line change time.

STANDARD ACCESSORIES

• CNC Controller (Brand: SIEMENS 828D) x 1 set
• Grinding Wheel and Flange x 1 set
• Carbide Tipped Work Centers (2 pcs/set) x 1 set
• Diamond Tool Holder (tailstock mounted type) x 1 set
• Linear Scale for X-axis x 1 set
• Grinding Wheel Inverter x 1 set
• Electric System x 1 set
• Fully Enclosed Splash Guard x 1 set
• Lubrication System x 1 set
• Coolant System x 1 set
• Work Lamp x 1 set
• Tools (Leveling pad) and Tool Box x 1 set

OPTIONAL ACCESSORIES

• Air cylinder tailstock
• Cam-locked Driving Dogs
• Dual synchronous driving system
• Work Holder 2 pcs/set
• 2-point Steady Rest
• Adjustable 3-point Steady Rest
• Adjustable 3-jaw Scroll Chuck
• Adjustable 4-jaw Scroll Chuck
• Wheel Balancing Stand and Arbor
• Auto. Grinding Wheel Balancer
• Spare Grinding Wheel and Flange
• Jib Crane for Loading / Unloading G.W.
• Touch Probe Gauge
• Auto. In-Process Gauge
• Gap Control
• Linear Scale for Z-axis
• Magnetic Coolant Separator
• Paper Filter
• Oil Mist Collector

SPECIFICATION
Capacity:
Swing Over Table: Ø270 mm
Distance Between Centers: 400 mm
Max. Grinding Diameter: Ø250 mm
Max. Grinding Length: 400 mm
Max. Load Held Between Centers: 60 kg
Center Height (from table to center tip): 135 mm

Grinding Wheel:
Size (O.D. x width x I.D.): Ø405 x 50 (max.: 75) x Ø127 mm
Linear Velocity: 45 m/sec

Worktable:
Swiveling Angle: -1° ~ +8° / -1° ~ +5° (dual-drive)

Workhead:
Swiveling Angle: -30° ~ +90°
Center Tapper: MT. No.3 / dual-drive (special center)
Spindle Speed: 10 ~ 300 rpm
Max. Load of Spindle (tool holder included): 15 kg (max. length: 100 mm) * Ø155

Tailstock:
Center Tapper: MT. No. 3 / dual-drive (special center)
Center Moving: Manual (opt.: Automatic)
Tailstock Stroke: 25 mm / (opt.: dual-drive 50 mm) / (opt.: hydraulic 30 mm)

X-axis Travel:
Max. Travel: 300 mm
Rapid Feedrate Speed: 10000 mm/Min
Auto. Feeding Speed: 0.001 ~ 2000 mm/Min
Min. Feeding Setting: 0.001 mm

Z-axis Travel:
Max. Travel: 580 mm
Rapid Feedrate Speed: 10000 mm/Min
Auto. Feeding Speed: 0.001 ~ 2000 mm/Min
Min. Feeding Setting: 0.001 mm

Drive Motors:
Grinding Wheel Spindle: 5.5 kW
Workhead Spindle Motor: 1.0 kW / opt.: 0.8 kW (dual-drive) (servo motor)
Wheelhead Feed X-axis: 1.5 kW (servo motor)
Table Feed Z-axis: 1.5 kW (servo motor)
Lubrication Oil Pump (Guideway): NIL
Hydraulic Oil Pump (for opt. acc.): 0.75 kW
Coolant Pump: 0.18 kW

Tank Capacities:
Hydraulic Oil Tank (for opt. acc.): 18 L
Lubrication Oil Tank (Guideway): P-107 (Auto. Lubrication)
Coolant Tank: 107 L

Machine:
Dimension (L x W x H): 2300 x 2210 x 1960 mm
Net Weight: 4300 kg
Center Height (from floor to center tip): 1100 mm

Caractéristiques / spécifications techniques

• Model: X-2540LM
• Brand: TOPKING Technology Co., Ltd.
• Swing over table: Ø270 mm
• Distance between centers: 400 mm
• Max. grinding diameter: Ø250 mm
• Max. grinding length: 400 mm
• Grinding wheel size: Ø405 x 50 (max. 75) x Ø127 mm
• X-axis max travel: 300 mm; Z-axis max travel: 580 mm
• Rapid feedrate: 10000 mm/min (X & Z)
• Grinding wheel spindle motor: 5.5 kW
• Workhead spindle speed: 10–300 rpm
• Coolant tank: 107 L
• Machine dimension: 2300 x 2210 x 1960 mm; Net weight: 4300 kg