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Product Overview

 

This CNC cylindrical grinding machine is engineered for high-precision external diameter, step, and tapered face grinding on rotational components. Built on a cast Meehanite iron bed with finite element analysis (FEA) optimization, the machine structure absorbs high cutting forces while maintaining thermal equilibrium. Linear axes (X and Z) are driven by closed-loop AC servo motors coupled directly to precision preloaded ball screws, achieving a positioning accuracy of 0.001 mm and a repeatability of 0.0005 mm.

 
 
Key Features

Hydrodynamic Wheel Spindle

Supported by multi-point hydrodynamic oil film bearings, isolating the grinding wheel from vibration and maintaining a radial runout below 0.001 mm.

B-Axis Wheelhead Swivel

Programmable B-axis positioning enables automated angular transitions for multi-diameter stepped shafts without manual fixture adjustments.

Integrated Acoustic Emission (AE) Sensor

Detects initial wheel-to-workpiece contact and monitors dress intervals in real-time, reducing idle cycle times by up to 18%.

Full Enclosure Coolant Management

External chiller units regulate coolant temperature within +/- 0.5 degrees C of ambient workspace temperature to prevent thermal expansion of the workpiece.

 

Machining Capabilities
 

Dimensional Tolerance

IT5 to IT6 cylindrical accuracy.

Surface Finish

Achievable roughness down to Ra 0.2 um (material dependent).

Workpiece Capacity

Maximum swing diameter 320 mm to 500 mm; distance between centers from 1000 mm to 2000 mm.

Max Workpiece Weight

Up to 150 kg between centers.

 

Machine Configuration
1

CNC System

FANUC 0i-TF Plus or Siemens Sinumerik 828D with conversational grinding cycles.

2

Drive Motors

Fanuc absolute encoder servo motors on X and Z axes.

3

Workhead

Variable speed spindle driven by an AC inverter (10 to 500 RPM).

4

Tailstock

Hydraulic quill actuation with adjustable thrust force to prevent workpiece distortion.

 

Application

 

 

Automotive

Transmission shafts, camshafts, CV joint components, and rotor shafts.

 

Aerospace

Landing gear struts, hydraulic actuators, and turbine shafts.

 

Industrial Power

Electric motor rotors, precision ball screws, and hydraulic pump spools.

 

 

 

How to Choose

Determine Workpiece Geometry: Match maximum length and swing diameter requirements against table travel limits and center height.


Evaluate Material Removal Rate (MRR): Select wheel spindle power (7.5 kW to 18.5 kW) based on stock allowance and hardness of hardened alloy steels (HRC 55-65).


Define Automation Level: Choose between manual loading for low-volume toolrooms or gantry loader / robotic integration for continuous cell production.

CNC Cylindrical Grinder

 

 
 
Manufacturing & Quality Control

Bed Casting Aging

Meehanite iron castings undergo thermal annealing and natural seasoning for 90 days to eliminate internal residual stress prior to precision guideway grinding.

Laser Interferometer Calibration

Every machine axis is laser-calibrated for pitch, yaw, and linear displacement errors to conform to ISO 230-2 standards.

Ballbar Testing

Circular interpolation tests are executed on X and Z axes to verify contouring accuracy and eliminate servo mismatch.

72-Hour Burn-in Test

Continuous dry-run testing under simulated load conditions validates thermal stability and hydraulic circuit integrity before crating.

 

Optional Configuration

In-Process Gauging

Marposs or Renishaw measuring heads for automatic size control without retracting the wheel.

High-Speed CBN Wheel Package

Wheel peripheral speed up to 80 m/s with dedicated high-pressure coolant filtration system (10 bar).

Automatic Balancing System

Dynamic balancing head on the wheel spindle to neutralize vibration from wheel wear during heavy stock removal.

 

 

 

FAQ

 

 

Q: What is the standard delivery lead time for a customized cylindrical grinder?

A: Standard configurations ship within 90 to 120 days. Custom tailstock designs, specialized steady rests, or integrated robotic loading cells require 150 to 180 days from drawing sign-off.

Q: How do you prevent thermal distortion during continuous multi-shift production?

A: The machine incorporates a chilled hydraulic oil station and a separate spindle coolant loop. Temperature sensors monitor bed and headstock thermal growth, feeding real-time compensation values directly into the CNC offset register.

Q: What is the minimum resolvable increment on the X-axis feed?

A: The X-axis employs a direct-couple optical scale system with a feedback resolution of 0.0001 mm (0.1 um), allowing strict control over radial infeed steps during plunge grinding.

Q: Can this machine handle both live-center and dead-center grinding operations?

A: Yes. The workhead spindle can be locked for dead-center grinding (to maintain absolute concentricity against a stationary center) or unlocked for live-center rotation driven by a faceplate dog.

Q: What power supply and pneumatic requirements are necessary for installation?

A: The machine requires 380V +/- 10%, 50/60 Hz, 3-phase power (total connected load approx. 25 kVA) and an incoming dry air supply at 0.6 MPa with a flow rate of 250 L/min.

Q: What factory acceptance testing (FAT) documentation is provided prior to shipment?

A: Clients receive a complete geometric inspection report (ISO 230-1), laser calibration charts, circular test graphs, material certificates for major castings, and a 72-hour test run log.

As one of the most professional cylindrical grinding machine manufacturers in China, we're featured by quality products and good price. Please rest assured to buy high-grade cylindrical grinding machine for sale here from our factory. If you have any enquiry about cooperation, please feel free to email us.

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