Centerless grinding machine H series

workpiecehorizontalCNC

INTRODUCTION
The H Series is built around static pressure (hydrostatic) technology, offering high precision, low wear, and long-term stability to ensure consistent processing quality. The wheel spindle, regulating wheel spindle, and feeding axis (lower slide rail) are supported by a static pressure oil film, allowing for contact-free operation to prevent mechanical wear and maintain high precision during extended use.
The series delivers high rigidity and damping characteristics that reduce vibration and enhance stability and surface quality during machining. The minimum feed rate can be as low as 0.0005 mm, ensuring excellent roundness, surface quality, and dimensional accuracy of workpieces.

CAPACITY

• Standard Grinding Range (diameter): Ø2 ~ Ø75 mm
• Grinding Wheel (O.D. x width x I.D.): Ø510 x 205 / 255 x Ø304.8 (7A) mm
• Linear Velocity: 33 m/sec (45 m/sec)
• Regulating Wheel (O.D. x width x I.D.): Ø330 x 205 / 255 x Ø177.8 (7A) mm
• R.W. Speed (noted on page): 10 ~ 2200 rpm (also appears in specification as 10 ~ 220 rpm)
• Max. Infeed Length: 200 mm (H-5020-CNC) / 250 mm (H-5025-CNC)

MACHINE FEATURE: HIGH-PERFORMANCE GRAPHICAL USER INTERFACE

• Control system with a teach-in Graphical User Interface (GUI) that does not require program editing for operation.
• HMI with touch screen; user interface includes shortcut keys for micro-feeding adjustment, making grinding size adjustment easy.

MACHINE FEATURE: RIGID MACHINE BASE

• Machine structure made of high-quality Meehanite cast iron, heat treated and stress relieved before machining.
• Slides hardened by high frequency and precision ground; material provides stability, low deformation risk, and excellent wear resistance.

ADVANTAGE OF HYDROSTATIC SPINDLE AND SLIDE RAIL

• No metal-to-metal abrasion, improving machine service life.
• Extremely low metal friction and low temperature rise during processing, reducing deformation and improving processing stability and component accuracy.
• High-pressure oil film around the spindle suitable for high-speed rotation.
• High-precision application and constant rotation ensure rotation accuracy.

OIL COOLANT SYSTEM

• Equipped with an oil cooler to maintain constant oil temperature and prevent spindle accuracy loss due to oil temperature variation.

ACCUMULATOR FOR PROTECTION DEVICE

• Special pressure accumulator design allows hydrostatic oil to return to the main shaft hydrostatic system when pressure drops (e.g., power failure), avoiding damage from momentary loss of static pressure oil film while the spindle is running at high speed.

HYDROSTATIC GUIDEWAY CONSTRUCTION

• R.W. lower slider (infeed axis) uses hydrostatic guideway design for extremely smooth and fast sliding, high precision feeding accuracy, and stable grinding accuracy.
• Lower feeding axis driven by servo motor with harmonic reducer to reduce backlash, increase torque, improve grinding efficiency, and stabilize precision.
• Minimum manual micro-adjustment feeding: 0.001 mm; minimum NC feeding increment can be set to 0.0005 mm.

STABLE GRINDING WHEEL AUTO. DRESSING UNIT (FOR 1-AXIS AND ABOVE)

• Lower slideways of the grinding wheel dressing seat designed as a concave dovetail structure combined with an extra-large sideway to improve device stability.

DRESSING DEVICE OF R.W. & G.W. (FOR 1 AXIS)

• Dressing structure made of special alloy cast iron and heat treated for wear resistance.
• Dressing device driven front and rear by hydraulic pressure and can be matched with a servo motor for profile dressing.
• Variable dressing speed; R.W. dressing device adjustable to ensure cylinder accuracy.

AXIAL COMBINATION FOR CNC SERIES

• Z-axis: Grinding wheel auto. dressing (Vertical)
• Y-axis: Grinding wheel auto. dressing (Horizontal)
• A-axis: Regulating wheel auto. dressing (Vertical)
• B-axis: Regulating wheel auto. dressing (Horizontal)
• C-axis: Regulating wheel auto. upper slide auto. infeed
• X-axis: Regulating wheel auto. lower slide auto. infeed

SPECIFICATION
Capacity | H-5020-CNC | H-5025-CNC
Standard Grinding Range (dia.) | Ø2 ~ Ø75 mm | Ø2 ~ Ø75 mm
Max. Infeed Length | 200 mm | 250 mm
Auto. Infeed Min. Increment | 0.0005 mm | 0.0005 mm
Grinding Wheel - Size (O.D. x width x I.D.) | Ø510 x 205 x Ø304.8(7A) mm | Ø510 x 255 x Ø304.8(7A) mm
Linear Velocity | 33 m/sec (45 m/sec) | 33 m/sec (45 m/sec)
Regulating Wheel - Size (O.D. x width x I.D.) | Ø330 x 205 x Ø177.8(7A) mm | Ø330 x 255 x Ø177.8(7A) mm
Regulating Wheel Speed (page entries) | 10 ~ 2200 rpm (also listed in table as 10 ~ 220 rpm) | 10 ~ 2200 rpm (also listed in table as 10 ~ 220 rpm)
Tilt Angle | +5° ~ -3° | +5° ~ -3°
Swivel Angle | ±5° | ±5°
Hand wheel Graduation - Upper Slide Feed | 3.5 mm/rev. (0.05 mm/graduation) | 3.5 mm/rev. (0.05 mm/graduation)
Lower Slide Micro-Feed | 0.1 mm/rev. (0.001 mm/graduation) | 0.1 mm/rev. (0.001 mm/graduation)
Trimming Device | 2 mm/rev. (0.01 mm/graduation) | 2 mm/rev. (0.01 mm/graduation)
Drive Motors - Grinding Wheel | 11.25 kW (6P) | 11.25 kW (6P)
Drive Motors - Regulating Wheel | 5.0 kW (servo motor) | 5.0 kW (servo motor)
Lower Slide Feed Motor (X-axis) | 1.0 kW | 1.0 kW
Lubrication Oil Pump | 1.5 kW | 1.5 kW
Coolant Pump | 0.18 kW | 0.18 kW
Hydraulic Oil Chiller | 0.37 kW | 0.37 kW
Hydraulic Oil Tank | 90 L | 90 L
Coolant Tank | 160 L | 160 L
Machine Dimension (L x W x H) | 3580 x 2160 x 2020 mm | 3580 x 2160 x 2020 mm
Net Weight | 6140 kg | 6140 kg

STANDARD ACCESSORIES

• Grinding Wheel and Flange x 1 set
• Regulating Wheel and Flange x 1 set
• Infeed Work Rest and Carbide Blade x 1 set
• Thrufeed Work Rest and Carbide Blade x 1 set
• Diamond Tools (2 pcs/set) x 1 set
• Electric System x 1 set
• Lubrication System (with an oil coolant and an accumulator) x 1 set
• Coolant System x 1 set
• Work Lamp x 1 set
• Tools (Leveling Pad) and Tool Box x 1 set

OPTIONAL ACCESSORIES

• Wheel Balancing Stand & Arbor
• Profile Grinding Attachment
• Grinding Wheel Ionization Dressing Device
• Hydraulic Work Ejector (Infeed Grinding)
• Manual Feeder For Infeed Grinding (Up and Down)
• Auto. Loading Attachment (Thrufeed Grinding)
• Automatic Feeder (Thrufeed Grinding)
• Auto. Unloading Attachment (Thrufeed Grinding)
• V Type Supporter for Long Bar Grinding
• Auto. Loading and Unloading Attachment (Infeed Grinding)
• Vibratory Feeder (Thrufeed Grinding)
• Fully Splash Guard
• Magnetic Coolant Separator
• Paper Filter
• Hydro cyclone Coolant Separator
• Jig Crank for Grinding Wheel

VIDEO
Embedded product video available.

Caractéristiques / spécifications techniques

• Series: H Series (Hydrostatic CNC series)
• Standard grinding diameter: Ø2 ~ Ø75 mm
• Max infeed: 200 mm (H-5020-CNC), 250 mm (H-5025-CNC)
• Auto infeed minimum increment: 0.0005 mm
• Grinding wheel sizes: Ø510 x 205 / 255 x Ø304.8(7A) mm
• Linear velocity: 33 m/sec (optionally 45 m/sec)
• Regulating wheel sizes: Ø330 x 205 / 255 x Ø177.8(7A) mm
• Regulating wheel speed (page entries): 10 ~ 2200 rpm; spec table lists 10 ~ 220 rpm
• Grinding wheel motor: 11.25 kW
• Regulating wheel motor: 5.0 kW (servo)
• Hydraulic oil tank: 90 L; Coolant tank: 160 L
• Machine dimension: 3580 x 2160 x 2020 mm; Net weight: 6140 kg