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- Hydrostatic Centerless Grinder | CNC series
- CENTERLESS GRINDER｜H-5020-CNC | H-5025-CNC
Hydrostatic Centerless Grinder | CNC series
CENTERLESS GRINDER｜H-5020-CNC | H-5025-CNC
CENTERLESS GRINDING MACHINESINTRODUCTION
The H Series is built around static pressure 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. This prevents mechanical wear and maintains high precision even during extended use.
Its high rigidity and damping characteristics effectively reduce vibration, enhancing stability and surface quality during machining. The minimum feed rate is as low as 0.0005mm, ensuring excellent roundness, surface quality, and dimensional accuracy of the workpiece.
| CAPACITY
Standard Grinding Range (dia.): 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: 10 ~ 220 rpm
Max. Infeed Length: 200 / 250 mm
MACHINE FEATURE
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HIGH-PERFORMANCE GRAPHICAL USER INTERFACE
■ The control system with a teach-in Graphical User Interface(GUI) without program editing, provides the most convenient operate environment.
■ HMI with touch screen, user interface embeds shortcut keys for micro-feeding adjustment. It’s easy to adjust the grinding size.
RIGID MACHINE BASE
■ The machine structure is made of high-quality Meehanite cast iron, which is processed after being heat treated and stress relieved before machining. The slide is hardened by high frequency and precision ground. The material of the machine structure is stable, has no doubt of deformation, and has excellent wear resistance.
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HYDROSTATIC SPINDLE
Both grinding and regulating wheel spindles use hydrostatic support, with pressurized oil forming a stable film for smooth rotation and reduced mechanical wear.■ Stable Spindle Rotation: Maintains smooth rotation across a wide speed range. and component accuracy.
■ Reduced Mechanical Wear: Non-contact oil film minimizes metal-to-metal contact and wear.
■ Lower Friction & Heat: Reduces friction and heat generation, supporting long-term spindle stability and grinding accuracy.
OIL COOLANT SYSTEM
■ The oil coolant system is equipped with an oil cooler to effectively maintain a constant oil temperature and prevent the spindle from affecting the machining accuracy due to changes in oil temperature.
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ACCUMULATOR FOR PROTECTION DEVICE
■ The special pressure accumulator design can make the hydrostatic oil return to the hydrostatic system of the main shaft when the pressure drops due to power failure. It can avoid the damage caused by the momentary loss of static pressure oil film caused by power failure when the spindle is running at high speed.
HYDROSTATIC INFEED SYSTEM
Hydrostatic guideways provide smooth, low-friction movement of the regulating wheel slide. Combined with a servo motor and harmonic reducer, the system supports precise infeed control with minimal backlash.
■ Smooth Infeed Motion: Hydrostatic guideways reduce friction and ensure stable slide movement.
■ Reduced Backlash: A servo motor with a harmonic reducer minimizes drive backlash and increases torque.
■ Fine Infeed Control: Manual fine adjustment of 0.001 mm and a minimum programmable NC infeed increment of 0.0005 mm.
GRINDING WHEEL DRESSER
The dresser features heat-treated alloy cast iron and a recessed dovetail slideway with a wide bearing surface for improved rigidity, wear resistance, and dressing stability. Hydraulic traverse is standard, with optional servo-driven profile dressing and continuously adjustable dressing speed.
REGULATING WHEEL DRESSER
The dresser uses heat-treated alloy cast iron for wear resistance and structural stability. Adjustable dressing angles accommodate different workpiece requirements, while hydraulic traverse with continuously adjustable speed or optional servo-driven profile dressing helps maintain workpiece cylindricity.
AXIAL COMBINATION FOR CNC SERIES
GRINDING WHEEL DRESSING
Z and Y axes control vertical and horizontal grinding wheel dressing, enabling programmed profiles such as steps, radii, and chamfers through coordinated two-axis movement.
■ Z-axis: Vertical Dressing
■ Y-axis: Horizontal Dressing
REGULATING WHEEL DRESSING
A and B axes control vertical and horizontal regulating wheel dressing, allowing profile adjustments for different grinding requirements and synchronous dressing during multi-step infeed grinding.
■ A-axis: Vertical Dressing
■ B-axis: Horizontal Dressing
REGULATING WHEEL INFEED
C and X axes control the upper and lower regulating wheel slides. C handles upper slide positioning and infeed for selected applications, while X provides fine infeed and size adjustment.
■ C-axis: Upper Slide Positioning & Infeed
■ X-axis: Lower Slide Fine Infeed & Size Adjustment
SPECIFICATION
| Capacity | H-5020-CNC | H-5025-CNC |
|---|---|---|
| Standard Grinding Range (dia.) | Ø2 ~ Ø75 mm | Ø2 ~ Ø75 mm |
| Max. lnfeed 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 | 33m/sec (45 m/sec) | 33m/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 |
| Speed | 10 ~ 220 rpm | 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) |
| Regulating Wheel | 5.0 kW (servo motor) | 5.0 kW (servo motor) |
| Lower Slide Feed Motor (X-axis)(NC one 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 |
| Tank Capacities | ||
| Hydraulic Oil Tank | 90 L | 90 L |
| Coolant Tank | 160 L | 160 L |
| Machine | ||
| Dimension (L x W x H) | 3560 x 2960 x 2100 mm | 3560 x 2960 x 2100 mm |
| Net Weight | 6140 kg | 6140 kg |
* The mentioned specifications & dimensions are subject to change without notice.
ACCESSORIES
STANDARD ACCESSORIES
■ Grinding Wheel and Flange x 1 set
■ Regulating Wheel and Flange x 1set
■ In-feed Work Rest and Carbide Blade x 1 set
■ Thru-feed 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 Pads) and Tool Box x 1 set
OPTIONAL ACCESSORIES
■ Wheel Balancing Stand & Arbor
■ Profile Grinding Attachment
■ Diamond Roller Dressing Device
■ Free Abrasive Type Diamond G.W. Dressing Device
■ Hydraulic Work Ejector (In-feed Grinding)
■ Manual Feeder For In-feed Grinding (Up and Down)
■ Auto. Loading Attachment (Thru-feed Grinding)
■ Automatic Feeder (Thru-feed Grinding)
■ Auto. Unloading Attachment (Thru-feed Grinding)
■ V Type Supporter for Long Bar Grinding
■ Auto. Loading and Unloading Attachment (In-feed Grinding)
■ Vibratory Feeder (Thru-feed Grinding)
■ Fully Enclosed Splash Guard
■ Magnetic Coolant Separator
■ Paper Filter
■ Hydro cyclone Coolant Separator
■ X axis Linear Scale
■ Jig Crank for Grinding Wheel
