Wide-Wheel CNC Centerless Grinder

Wide-wheel CNC centerless grinders hold an irreplaceable position in machining long shaft parts because their core innovation-widening the grinding wheel-overcomes the three major bottlenecks of efficiency, precision, and surface quality faced by traditional narrow-wheel grinding machines.

 

The MX-MK11250 series wide-wheel CNC centerless grinder is mainly used for through-grinding of various cylindrical parts, annular parts, and long rods. Cut-in grinding of cones with a cone less than 1:20 and various formed rotating parts.

 

 

 

• Increased Production Efficiency (Multiple Steps)

* One-Pass Grinding: For shaft parts with lengths between 500mm and 1500mm, traditional machine tools may require multiple passes or extremely slow feeds, while wide-wheel grinding machines can complete the grinding in a single high-speed pass.

* Reduced Cycle Time: Compared to conventional machine tools, centerless grinders typically achieve a significant improvement in processing efficiency, reaching three to five times that of conventional machine tools. For mass production of automotive half-shafts, hydraulic rods, etc., this is key to cost reduction.

 

• Superior Geometric Precision

* Elimination of "Center Concavity": In the traditional narrow-wheel grinding of long shafts, due to changes in workpiece weight and grinding force, the middle part is easily over-ground while the ends are under-ground, forming a center concavity phenomenon similar to a waist drum or saddle shape. When using a wide grinding wheel, the longer guide reference effectively suppresses deformation caused by temperature changes, resulting in more precise control of cylindricity, typically achieving a standard within 0.002mm/500mm.

* High Straightness: Continuous support and grinding ensure the straightness of the long axis, reducing subsequent straightening processes.

 

• Perfect Surface Quality

* No Chatter Marks/Chatter Marks: Narrow grinding wheels are prone to chatter marks during feeding due to vibration or uneven feed. Wide grinding wheels, with their large contact area and smooth process, produce a uniform surface texture without chatter marks.

* Mirror Finish: Through precision grinding, a mirror finish with Ra 0.1 - 0.2 μm can be achieved, which is particularly suitable for applications with extremely high surface finish requirements, such as hydraulic seals.

 

• Excellent Process Stability

* Strong Anti-interference Capability: The large mass of the grinding wheel and the hydrostatic spindle system constitute a high-inertia, high-damping system, exhibiting extremely low sensitivity to external vibrations and fluctuations in blank allowance, resulting in a relatively stable machining process.

* Long Grinding Wheel Life: Although the amount removed in a single dressing cycle is large, the grinding load is distributed across a larger grinding wheel surface, reducing the wear rate per unit area, improving wheel shape retention, and extending dressing intervals.

 

• Automation Ready

* Continuous Flow Production: Wide-wheel through-grinding is naturally suited to a continuous production model of "one-end in, one-end out," easily integrating with automated feeders, gantry robots, or other robotic systems to create unmanned, lights-out factories.

 

 

Product Name	Wide-Wheel CNC Centerless Grinder
Model	MX-MK11250
Plunge-feed
Grinding Diameter	10-250mm
Max. Grinding Length	590mm
Through-feed
Grinding Diameter	10-250mm
Grinding Wheel Specification	P600x600x305mm
Regulating Wheel Specification	P350x600x203mm
Grinding Wheel Speed	1110r/min
Regulating Wheel Speed (stepless)	10-200r/min
Regulating Wheel Frame Swivel Angle
Vertical	-2°- +4°
Horizontal	0°- +3°
Grinding Wheel Frame Min Feed Amount	0.001mm
Regulating Wheel Frame Min Feed Amount	0.01mm
Grinding Wheel Dresser Feed Amount/Division	0.01mm
Regulating Wheel Dresser Feed Amount/Division	0.01mm
Height From Centerline of Gri. Wheel & Reg. Wheel To Work Rest	290mm
Total Power
Grinding Wheel Motor	45KW
Regulating Wheel Motor	3KW
Power Supply	3N 50Hz 380V
Machine Dimension (LxWxH)	3700x1850x1820mm
Machine Weight	About 11000Kg
Accuracy (Standard Bars)
Roundness	0.002mm
Cylindricity	0.005mm
Roughness	Ra0.32μm

 

 

Comparison Dimensions	Ordinary Centerless Grinding Machine (Narrow Grinding Wheel)	Wide-Wheel CNC Centerless Grinder	Advantages
Applicable Workpiece Length	Short shafts (<300mm) or long shafts requiring reciprocating grinding	Long shafts (500mm - 2000mm+)	Specializes in long shaft challenges
Machining Method	Plunge method or low-speed through-feed	High-speed through-feed	Efficiency improvement 3-5 times
Cylindricity Accuracy	Long shafts are prone to concave/conical shapes	Extremely high, excellent consistency throughout	More stable accuracy
Surface Texture	Prone to spiral patterns	Uniform and delicate, no texture	Higher quality
Spindle Configuration	Primarily rolling bearings	Primarily hydrostatic bearings	Stronger rigidity, less vibration
Unit Cost	Higher (time-consuming)	Extremely low (high efficiency)	High overall benefit

 

The appearance design of the MX-MK11250 wide-wheel CNC centerless grinder follows the principles of "safe enclosure, convenient operation, clear vision, and easy maintenance." It departs from the image of traditional open machine tools covered in oil stains, becoming a highly integrated, intelligent, modern precision manufacturing unit that meets the standards of a garden-style factory.

 

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