Centerless grinding machine H-5020

workpiecehorizontalNC

INTRODUCTION
The H-5020-NC is engineered for stable, high-precision production. Featuring advanced Hydrostatic Technology on spindles and slides, its high-pressure oil film ensures non-contact operation, eliminating wear and vibration for a smooth, "stick-slip" free process.

Supporting workpieces from Ø2 to Ø75 mm, it offers a 0.0005 mm minimum infeed for micron-level precision and superior surface finish. Built with Meehanite cast iron and an intuitive graphical interface, it allows quick setup without complex coding. With built-in accumulator protection and oil cooling, it is designed for high-yield, long-life manufacturing.

CAPACITY
Standard Grinding Range (dia.): Ø2 ~ Ø75 mm
Grinding Wheel (O.D. × width × I.D.): Ø510 × 205 × Ø304.8 (7A) mm
Linear Velocity: 33 m/sec (45 m/sec)
Regulating Wheel (O.D. × width × I.D.): Ø330 × 205 × Ø177.8 (7A) mm
R.W. Speed: 10 ~ 220 rpm
Max. Infeed Length: 200 mm

MACHINE FEATURE
HIGH-PERFORMANCE GRAPHICAL USER INTERFACE
The control system with a teach-in Graphical User Interface (GUI) requires no program editing and provides a convenient operating environment. HMI with touch screen embeds shortcut keys for micro-feeding adjustment, making grinding size adjustment easy.

RIGID MACHINE BASE
The machine structure is made of high-quality Meehanite cast iron, processed after heat treatment and stress relief. Slides are hardened by high frequency and precision ground for stable, deformation-resistant, wear-resistant structure.

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 to improve stability and accuracy.
■ High-pressure oil film around the spindle suitable for high-speed rotation.
■ High-precision rotation accuracy and constant rotation.

OIL COOLANT SYSTEM
The oil coolant system includes an oil cooler to maintain constant oil temperature and prevent spindle accuracy degradation due to oil temperature changes.

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

HYDROSTATIC GUIDEWAY CONSTRUCTION
R.W. lower slider (infeed axis) uses hydrostatic guideway construction for extremely smooth and fast sliding, high feeding precision, and stable grinding accuracy. Lower feeding axis is driven by servo motor cooperating with harmonic reducer to reduce backlash, increase torque, and stabilize grinding quality. Minimum manual feeding increment: 0.001 mm; minimum numerical control feeding increment: 0.0005 mm.

STABLE GRINDING WHEEL AUTO. DRESSING UNIT (FOR 1-AXIS ABOVE)
Lower slideways of the grinding wheel dressing seat are concave dovetail structure combined with extra-large sideway to improve stability of the grinding wheel device.

DRESSING DEVICE OF R.W. & G.W. (FOR 1 AXIS)
Dressing structure made of special alloy cast iron and heat treated for wear resistance. Driven front and rear by hydraulic pressure, can be matched with servo motor for profile dressing. Variable dressing speed and adjustable for component requirements.

AXIAL COMBINATION FOR NC SERIES
■ One axis: X-axis: R.W. lower slide auto. in-feed control.
■ Two axes: Z-axis: G.W. auto. dressing (Vertical) / X-axis: R.W. lower slide auto. in-feed.

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

SPECIFICATION
Capacity
Standard Grinding Range (dia.): Ø2 ~ Ø75 mm
Max. Infeed Length: 200 mm
Auto. Infeed Min. Increment: 0.0005 mm

Grinding Wheel
Size (O.D. x width x I.D.): Ø510 x 205 x Ø304.8 (7A) mm
Linear Velocity: 33 m/sec (45 m/sec)

Regulating Wheel
Size (O.D. x width x I.D.): Ø330 x 205 x Ø177.8 (7A) mm
Speed: 10 ~ 220 rpm
Tilt Angle: +5° ~ -3°
Swivel Angle: ±5°

Hand wheel Graduation
Upper Slide Feed: 3.5 mm/rev. (0.05 mm/graduation)
Lower Slide Micro-Feed: 0.1 mm/rev. (0.001 mm/graduation)
Trimming Device: 2 mm/rev. (0.01 mm/graduation)

Drive Motors
Grinding Wheel: 11.25 kW (6P)
Regulating Wheel: 5.0 kW (servo motor)
Lower Slide Feed Motor (X-axis)(NC one axis): 1.0 kW
Lubrication Oil Pump: 1.5 kW
Coolant Pump: 0.18 kW
Hydraulic Oil Chiller: 0.37 kW

Tank Capacities
Hydraulic Oil Tank: 90 L
Coolant Tank: 160 L

Machine
Dimension (L x W x H): 3810 x 1620 x 2160 mm
Net Weight: (not specified)

caractéristiques / spécifications techniques

• Model: H-5020-NC
• Standard grinding diameter range: Ø2 ~ Ø75 mm
• Max. infeed length: 200 mm
• Minimum automatic infeed increment: 0.0005 mm
• Grinding wheel size: Ø510 × 205 × Ø304.8 (7A) mm
• Regulating wheel size: Ø330 × 205 × Ø177.8 (7A) mm
• Grinding wheel linear velocity: 33 m/sec (45 m/sec)
• Regulating wheel speed: 10 ~ 220 rpm
• Grinding wheel motor: 11.25 kW (6P)
• Regulating wheel motor: 5.0 kW (servo)
• Hydraulic oil tank: 90 L
• Coolant tank: 160 L
• Machine dimensions (L×W×H): 3810 × 1620 × 2160 mm