Campbell Grinder CRG4000
Image: campbellgrinder.com, Campbell Grinder
Key Specifications
max part diameter
max grind length
max part weight
x axis accuracy
y axis accuracy
z axis accuracy
How much does the Campbell Grinder CRG4000 cost?
Price estimate
We do not have a price for the Campbell Grinder CRG4000 that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
The Campbell Grinder CRG4000 is a heavy-duty CNC horizontal cylindrical OD grinder for long, heavy shafts: parts up to 1,000 mm (40 in) in diameter, grind lengths up to 5,080 mm (200 in) and part weights of 4,530 kg (10,000 lbs).
It is the one horizontal machine in a range of vertical grinders, and Campbell lists it among its custom machines. The machine has three main sections: a bed carrying the linear axes, a fixed headstock that rotates the part, and a tailstock. The headstock spindle is belt driven, and its speed and load are monitored on the control. The tailstock rides on roller guideways, is moved along the bed by rack and pinion and a hand wheel, and is clamped manually at the length of the part.
Campbell states an accuracy of 5 microns (0.0002 in) for each of the X, Y and Z axes. The axes have linear drives and absolute scales, and the least command increment of the Fanuc CNC is 0.0001 mm. The control stores 2 Mb of part programs, takes standard G-code and comes with a remote hand pendant.
The standard feature list is short: roller ways and linear scales on all axes, a single point dresser, an ID grinding spindle and a full enclosure. What turns it into a specific machine is the option list, which includes a B-axis spindle turret indexer, C-axis headstock positioning, a headstock mounted disk dresser, a wheel balancer, automatic steady rests, probing for part and wheel, and coolant filtration and chilling.
Full Specifications
| Parameter | Value |
|---|---|
| Max Part Diameter | up to 1,000 mm (40 in) |
| Max Grind Length | up to 5,080 mm (200 in) |
| Max Part Weight | 4,530 kg (10,000 lbs) |
| X Axis Accuracy | 5 microns (0.0002 in) |
| Y Axis Accuracy | 5 microns (0.0002 in) |
| Z Axis Accuracy | 5 microns (0.0002 in) |
| Min Programmable Increment | 0.0001 mm (0.00001 in); 0.0001 degrees |
| Part Program Storage | 2 Mb |
| CNC Control | FANUC CNC |
Specifications sourced from campbellgrinder.com — verified 2026-10-05
Strengths & Limitations
Strengths
- Grind length up to 5,080 mm (200 in)
- Carries parts of 4,530 kg (10,000 lbs) and up to 1,000 mm (40 in) in diameter
- X, Y and Z accuracy of 5 microns (0.0002 in)
- Fanuc CNC with a least command increment of 0.0001 mm
Limitations
- A custom machine: the catalogue gives no standard wheel size, spindle power or speed
- The tailstock is positioned by hand wheel and clamped manually
- Steady rests, wheel balancing, probing and the C-axis headstock are options
Best For
Frequently Asked Questions
01
Up to 1,000 mm (40 in) in part diameter, up to 5,080 mm (200 in) in grind length and up to 4,530 kg (10,000 lbs) in part weight. Automatic steady rests are available as an option to support long parts against the forces of the grinding wheel.
02
In three main sections: a bed with the linear axes, a fixed headstock for part rotation and a tailstock. The headstock is belt driven. The tailstock is supported on a slide with roller guideways and is moved by a precision gear rack and pinion and a hand wheel, then locked with manual clamps.
03
A Fanuc CNC. Campbell lists a least command increment of 0.0001 mm (0.00001 in) and 0.0001 degrees, 2 Mb of part program storage, custom macro and inch/metric conversion. A remote hand pendant is supplied.
04
The catalogue gives 5 microns (0.0002 in) for the X axis, the Y axis and the Z axis. All axes have linear scales. Indicator tracks are supplied for taper measurements, and the tailstock is of a split design that allows taper adjustment during grinding.
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