Centerless grinding machine H-5025

workpiecehorizontalNC

INTRODUCTION
The H-5025-NC is a high-precision cylindrical grinding machine designed for stable, repeatable production of bars and turned parts. It features hydrostatic spindles and guideways to eliminate metal-to-metal contact, reduce vibration and wear, and enable micron-level infeed control down to 0.0005 mm for superior surface finish and dimensional accuracy. The machine base is Meehanite cast iron with heat treatment for thermal stability, and the user interface provides graphical teach-in control for fast setup without complex programming. Built-in accumulator protection and oil cooling ensure process security and long service life.

CAPACITY
Standard grinding diameter range: Ø2 ~ Ø75 mm
Grinding wheel (O.D. × width × I.D.): Ø510 × 255 × Ø304.8(7A) mm
Grinding wheel linear velocity: 33 m/sec (45 m/sec option)
Regulating wheel (O.D. × width × I.D.): Ø330 × 255 × Ø177.8(7A) mm
Regulating wheel speed: 10 ~ 220 rpm
Max. infeed length: 250 mm (spec sheet: 200 mm)
Auto. infeed minimum increment: 0.0005 mm

MACHINE FEATURES

• Graphical HMI with teach-in control and touch screen for quick setup and micro-feeding adjustments without program editing.
• Rigid Meehanite cast iron base, stress relieved and precision ground slides for thermal and mechanical stability.
• Hydrostatic spindle and guideway system providing non-contact support, very low friction and improved rotational accuracy and life.
• Oil coolant system with chiller to maintain constant oil temperature and protect machining accuracy.
• Accumulator protection that returns hydrostatic oil to the system on pressure drops (e.g., power loss) to prevent damage.
• Hydrostatic lower slide (infeed axis) for smooth, high-precision feeding; servo drive with harmonic reducer reduces backlash and increases torque. Manual micro-adjustment 0.001 mm.
• Stable automatic grinding wheel dressing unit with concave dovetail and oversized slide for repeatable dressing performance.
• Dressing units for regulating and grinding wheels made from heat-treated alloy cast iron; hydraulic or optional servo drives for profile dressing and variable speed.
• NC axial configurations: one-axis (X) for regulating wheel lower slide automatic infeed; two-axis (Z+X) for grinding wheel auto-dressing plus regulating wheel infeed control.
• Comprehensive safety and splash guards available as accessories for clean shop-floor operation.

STANDARD ACCESSORIES

• Grinding wheel and flange set ×1
• Regulating wheel and flange set ×1
• Infeed work rest and carbide blade set ×1
• Thrufeed work rest and carbide blade set ×1
• Diamond tools (2 pcs/set) ×1 set
• Electric control system ×1
• Lubrication system with oil coolant and accumulator ×1
• Coolant system ×1
• Work lamp ×1
• Tools (leveling pad) and toolbox ×1

OPTIONAL ACCESSORIES

• Wheel balancing stand and arbor
• Profile grinding attachment
• Grinding wheel ionization dressing device
• Hydraulic work ejector (infeed grinding)
• Manual feeder for infeed grinding (up/down)
• Automatic loading attachment (thrufeed grinding)
• Automatic feeder (thrufeed grinding)
• Automatic unloading attachment (thrufeed grinding)
• V-type supporter for long bar grinding
• Automatic loading/unloading attachment (infeed grinding)
• Vibratory feeder (thrufeed grinding)
• Full splash guard
• Magnetic coolant separator
• Paper filter
• Hydrocyclone coolant separator
• Jig crank for grinding wheel

SPECIFICATION
Standard grinding range (dia.): Ø2 ~ Ø75 mm
Max. infeed length: 200 mm (capacity paragraph indicates 250 mm)
Auto. infeed min. increment: 0.0005 mm
Grinding wheel size: Ø510 × 255 × Ø304.8(7A) mm; linear velocity 33 m/sec (45 m/sec option)
Regulating wheel size: Ø330 × 255 × Ø177.8(7A) mm; speed 10 ~ 220 rpm
Tilt angle: +5° ~ -3°; Swivel angle: ±5°
Hand wheel graduations: upper slide 3.5 mm/rev (0.05 mm/graduation); lower slide micro-feed 0.1 mm/rev (0.001 mm/graduation)
Drive motors: grinding wheel 11.25 kW (6P); regulating wheel 5.0 kW (servo); lower slide feed motor (X-axis NC one axis) 1.0 kW
Hydraulic oil tank: 90 L; Coolant tank: 160 L
Machine dimensions (L×W×H): 3380 × 2160 × 2020 mm

TECHNICAL CHARACTERISTICS

• Model: H-5025-NC
• Grinding diameter range: Ø2 ~ Ø75 mm
• Max. infeed length: 200–250 mm (see spec note)
• Auto. infeed resolution: 0.0005 mm
• Grinding wheel Ø510 × 255 × Ø304.8(7A) mm; linear speed 33 m/sec (option 45 m/sec)
• Regulating wheel Ø330 × 255 × Ø177.8(7A) mm; 10 ~ 220 rpm
• Drive motors: grinding 11.25 kW; regulating 5.0 kW (servo)
• Tanks: hydraulic oil 90 L; coolant 160 L
• Machine footprint: 3380 × 2160 × 2020 mm