KAAST CRG 250/500
Image: kaast-usa.com, KAAST
Key Specifications
control
swing over table
max grinding diameter
distance between centers
max load between centers
infeed angle
How much does the KAAST CRG 250/500 cost?
Price estimate
We do not have a price for the KAAST CRG 250/500 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 KAAST CRG 250/500 is a CNC cylindrical grinder for work up to Ø250 mm (10 in) in diameter and 500 mm (20 in) between centers, with a load limit of 80 kg (175 lb) between centers. It has 2 CNC axes under a Fanuc control, with Mitsubishi or Siemens listed as options.
The grinding wheel is Ø455 x 50 x Ø127 mm (18 x 2 x 5 in), with a 20 x 2 x 6 in wheel listed as an option, and it is driven by a 5.5 kW (7.5 hp) motor at 1,400 rpm. The table gives that one wheel speed and no range, so ask whether the speed can be varied if constant surface speed on a worn wheel matters for the job. An infeed angle of 60° is also listed.
The workhead runs from 10 to 600 rpm with infinitely variable speed on a 0.75 kW (1 hp) motor, and it swivels through 90°. Workhead and tailstock both take MT 3 centers. The tailstock quill travels only 25 mm (1 in), enough to load and release a part but not to cover a change in part length, which means moving the tailstock body. For shallow tapers the table swivels ±7°.
Both axes have a minimum increment of 0.0002 mm (0.000008 in). X travel is 200 mm (7.8 in) with a rapid of 6 m/min (236 in/min); Z travel is 750 mm (29.5 in) with a rapid of 8 m/min (316 in/min). The Z stroke is longer than the 500 mm (20 in) between centers, which leaves room to run the wheel clear of the part at both ends. The machine weighs 3,100 kg (6,840 lb).
Full Specifications
| Parameter | Value |
|---|---|
| CNC Control | Fanuc (2 axes); Mitsubishi or Siemens optional |
| Swing Over Table | Ø250 mm (10 in) |
| Max Grinding Diameter | Ø250 mm (10 in) |
| Distance Between Centers | 500 mm (20 in) |
| Max Load Between Centers | 80 kg (175 lb) |
| Infeed Angle | 60° |
| Wheel Size | Ø455 x 50 x Ø127 mm (18 x 2 x 5 in) (opt. 20 x 2 x 6 in) |
| Wheel Motor Power | 5.5 kW (7.5 hp) |
| Wheel Speed | 1,400 rpm |
| Workhead Swivel Angle | 90° |
| Workhead Speed | 10-600 rpm (infinitely variable) |
| Workhead Motor Power | 0.75 kW (1 hp) |
| Workhead Center Taper | MT 3 |
| Tailstock Quill Travel | 25 mm (1 in) |
| Tailstock Center Taper | MT 3 |
| X Axis Travel | 200 mm (7.8 in) |
| X Axis Rapid | 6 m/min (236 in/min) |
| X Axis Min Increment | 0.0002 mm (0.000008 in) |
| Z Axis Travel | 750 mm (29.5 in) |
| Table Swivel Angle | ±7° |
| Z Axis Rapid | 8 m/min (316 in/min) |
| Z Axis Min Increment | 0.0002 mm (0.000008 in) |
| Machine Weight | 3,100 kg (6,840 lb) |
Specifications sourced from kaast-usa.com — verified 2026-09-25
Strengths & Limitations
Strengths
- Minimum increment of 0.0002 mm (0.000008 in) on both X and Z
- 750 mm (29.5 in) of Z travel for 500 mm (20 in) between centers, so the wheel can run off both ends of the part
- Workhead speed is infinitely variable from 10 to 600 rpm, and the workhead swivels through 90°
- Table swivels ±7° for setting shallow tapers
- Ø455 x 50 x Ø127 mm (18 x 2 x 5 in) wheel on a 5.5 kW (7.5 hp) motor, with a 20 x 2 x 6 in wheel as an option
Limitations
- Load between centers is limited to 80 kg (175 lb)
- Tailstock quill travel is 25 mm (1 in), so a change in part length means moving the tailstock body
- The listed figures give one wheel speed, 1,400 rpm, with no range
- Mitsubishi and Siemens controls are options, not part of the base machine
Best For
Frequently Asked Questions
01
Up to Ø250 mm (10 in) in grinding diameter, which is also the swing over the table, and 500 mm (20 in) between centers. The load between centers is limited to 80 kg (175 lb). Both the workhead and the tailstock take MT 3 centers.
02
The listed wheel is Ø455 x 50 x Ø127 mm (18 x 2 x 5 in), with a 20 x 2 x 6 in wheel as an option. The wheel motor is 5.5 kW (7.5 hp) and the wheel speed is given as 1,400 rpm.
03
KAAST lists a Fanuc control with 2 axes, and Mitsubishi or Siemens as options. The two axes are X, with 200 mm (7.8 in) of travel, and Z, with 750 mm (29.5 in). Each has a minimum increment of 0.0002 mm (0.000008 in).
04
The listed figures give two swivels for it. The table swivels ±7°, the usual way to set a shallow taper on a part held between centers, and the workhead swivels through 90° for steeper angles. An infeed angle of 60° is also listed; ask KAAST how it applies to your part.
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