Wide-Wheel Centerless Grinding Machine

The MX-M11100 series wide-wheel centerless grinding machine is mainly used to grind the outer ring surfaces of various bearings with a diameter of φ10~100mm and the outer surfaces of various other similar parts with equal diameters. The wide-wheel centerless grinder also has an automatic cutting mechanism and a hydraulic and electrical control system for the manipulator. Therefore, after being equipped with the necessary manipulator loading and unloading devices and other special devices, the machine can also be used for cutting and forming grinding.

 

 

The MX-M11100 wide-wheel centerless grinding machine utilizes ultra-wide grinding wheels (typically over 300mm wide, even reaching 600mm-1000mm) specifically designed to solve the challenges of efficient, high-precision grinding of long shaft parts.

 

* Pain Point: Ordinary centerless grinders use narrower grinding wheels (typically 150-200mm), requiring multiple reciprocating passes or extremely slow feed rates when grinding long shafts, resulting in low efficiency and a tendency to produce chatter marks.

 

* Solution: By widening the grinding wheel, a longer workpiece area can be covered in a single pass. Combined with optimized guide wheel angles and a rigid structure, this achieves "one-pass, full-process forming," significantly improving production efficiency and ensuring cylindricity.

 

 

• Ultra-Wide Grinding Wheel Spindle System

* Grinding Wheel Size: Standard grinding wheel width is typically between 300mm and 600mm, with custom widths exceeding 1000mm. Outer diameter is typically 600mm to 900mm.

* Spindle Rigidity: Due to the wide and heavy grinding wheels and the wide distribution of grinding forces, the spindle must employ an ultra-large diameter design. It is typically equipped with hydrostatic bearings or extremely high-precision dynamically balanced rolling bearings to resist the enormous radial loads and prevent spindle bending deformation.

* Drive Power: To ensure that the wide grinding wheel maintains a constant linear velocity under full-width contact, the main motor power typically needs to be significantly increased to 30kW to 75kW or more.

 

• Widened Guide Rollers and Tilting Mechanism

* Guide Roller Width: The guide roller width is increased (200mm - 400mm) to ensure stable drive for long workpieces.

* Large Tilting Angle Capability: To match the grinding efficiency of wide grinding wheels, the guide roller head typically has a larger tilt angle adjustment range (0° - 6° or even greater), precisely controlled by a servo motor to adjust the feed rate.

 

• High-Rigidity Bed and Workrest Plate

* Bed Structure: Typically made of mineral castings or thickened stiffened cast iron, with a significantly increased length to support the wide grinding wheel assembly and the grinding stroke of long workpieces.

* Extended Workrest Blade: The workrest blade is much longer than that of ordinary models and must possess extremely high straightness and wear resistance. It is usually made entirely of carbide or inlaid with carbide strips to prevent long workpieces from sagging or vibrating under their own weight during grinding.

 

• Powerful Cooling and Chip Removal System

* Multi-point Spray: Due to the large grinding contact area and high heat generation, the cooling system uses multiple sets of high-pressure nozzles to spray evenly along the width of the grinding wheel, ensuring that the coolant can penetrate deep into the grinding zone and prevent workpiece burns.

* Large-capacity Filtration: The large amount of grinding chips generated requires a large magnetic separator, paper tape filter, or centrifugal separator to keep the coolant clean.

 

 

 

* Ultra-High Efficiency: Wide grinding wheels allow for larger guide wheel angles, resulting in faster axial feed rates. For long shafts, efficiency can be 3-5 times higher than conventional centerless grinders.

* Excellent Cylindricity: The wide grinding wheel acts as an extra-long "guide reference," effectively suppressing workpiece vibration and bending during grinding, ensuring the straightness and cylindricity of long shafts (typically within 0.002mm/300mm).

* Good Surface Quality Consistency: Avoids the marks caused by multiple tool cuts with narrow grinding wheels, resulting in uniform surface roughness across the entire workpiece, free of spiral marks.

* Long Grinding Wheel Life: Although the grinding wheel is larger and more expensive, the grinding load is distributed over a larger area, reducing wear per unit area and decreasing the frequency of dressing, resulting in a longer overall service life.

 

 

Wide-wheel centerless grinding machines are key equipment in the following industries:

Automotive Industry	* Driveshafts: Automotive half-shafts, steering tie rods, shock absorber piston rods (length often reaches 500mm-1000mm). * Engine Components: Long valve lifters, camshaft blank pretreatment.
Hydraulic and Pneumatic Industry	* Hydraulic cylinder piston rods: This is the most typical application, requiring extremely high straightness and surface finish; lengths are often over 1 meter. * Cylinder rods: Pneumatic rods in various engineering machinery.
Textile Machinery	* Long rollers, spindles, and other slender precision shafts on spinning machines.
Bearing Industry	* Batch grinding of long cylindrical rollers and railway bearing rollers.
Other General Machinery	* Various long pins, smooth shafts, and guide shafts.

 

 

 

Product Name	Wide-Wheel Centerless Grinding Machine
Model	MX-M11100
Plunge-feed
Grinding Diameter	10-100mm
Max. Grinding Length	390mm
Through-feed
Grinding Diameter	10-100mm
Grinding Wheel Specification	P500x400x305mm
Regulating Wheel Specification	P350x400x203mm
Grinding Wheel Speed	1330r/min
Regulating Wheel Speed (stepless)	10-200r/min
Regulating Wheel Frame Swivel Angle
Vertical	-2°- +4°
Horizontal	-2°- +4°
Grinding Wheel Frame Min Feed Amount	0.002mm
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	22KW
Regulating Wheel Motor	2.2KW
Power Supply	3N 50Hz 380V
Machine Dimension (LxWxH)	3500x1850x1720mm
Machine Weight	About 10000Kg
Accuracy (Standard Bars)
Roundness	0.002mm
Cylindricity	0.005mm
Roughness	Ra0.32μm

 

Wide-wheel centerless grinding machines are the "king of efficiency" for mass production of long shaft parts. They offer unparalleled efficiency and geometric precision in long shaft machining. For companies producing standard long shafts, such as automotive half-shafts and hydraulic rods, they are core equipment for improving production capacity and competitiveness.

 

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