Palmary PCB-4525
Image: palmary.com, Palmary
Key Specifications
grinding diameter range
wheel size
wheel peripheral speed
grinding wheel dressing device
grinding wheel spindle lubrication
regulating wheel size
How much does the Palmary PCB-4525 cost?
Price estimate
We do not have a price for the Palmary PCB-4525 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 Palmary PCB-4525 is the 255 mm wheel variant of Palmary's Ø455 mm bearing-spindle CNC centerless grinder. Standard grinding range is Ø1 to Ø80 mm and wheel speed 45 m/s (8,858 ft/min).
Both wheels are wider than on the PCB-4520: the grinding wheel is Ø455 mm by 255 mm and the regulating wheel Ø260 mm by 255 mm. Nothing else in the table moves. The listed weight is the same 3,800 kg (8,377 lb), the standard motor the same 15 HP (11 kW).
That makes the optional motor the item to decide on. Palmary offers 20 HP (15 kW) for the grinding wheel, and a 255 mm wheel working across its full width at 45 m/s is where the larger motor earns its keep. For through-feed finishing of small diameters the standard motor will usually do.
The design features are those of the series. Palmary describes a grinding wheel spindle held on one side in super precision cylindrical roller bearings, a bed and rib layout arranged for stable accuracy, and CNC control of up to 6 axes. Slides are square, with ball screw and reducer. The regulating wheel runs 10 to 300 rpm on a 2 kW (2.7 hp) servo and its dressing device has 0 to 15 mm of offset. A high speed loading and unloading attachment is optional, and the controller is FANUC.
Full Specifications
| Parameter | Value |
|---|---|
| Grinding Diameter Range | Ø1~Ø80 mm |
| Wheel Size | Ø455 x 255 x Ø228.6 mm (17.9 x 10.0 x 9.0 in) |
| Wheel Peripheral Speed | 45 m/s (8,858 ft/min) |
| Grinding Wheel Dressing Device | Single-point dressing device / (opt.)Diamond roller dressing device |
| Grinding Wheel Spindle Lubrication | Oil mist type |
| Regulating Wheel Size | Ø260 x 255 x Ø101.6 mm (10.2 x 10.0 x 4.0 in) |
| Regulating Wheel Speed | 10-300 rpm (variable speed) |
| Regulating Wheel Tilt Angle | ±5° |
| Regulating Wheel Swivel Angle | ±0.5° |
| Regulating Wheel Dresser Swivel Angle | ±5° |
| Regulating Wheel Dresser Offset | 0~15 mm |
| Lower and Upper Slide | Square slider, Ball screw + reducer |
| Grinding Wheel Motor | 15 HP x 4P (11 kW) / OPT. 20 HP x 4P (15 kW) |
| Regulating Wheel Motor | 2 kW (2.7 hp) servo motor |
| Regulating Wheel Spindle Lubrication | Oil grease type |
| Slide Lubrication | Auto lubricator (LUBE) |
| CNC Control | FANUC |
| Coolant Tank | 170 L (44.9 gal) |
| Wheel Spindle Lubrication Tank | 1.0 L (0.3 gal) |
| Slide Lubrication Tank | 4.0 L (1.1 gal) |
| Machine Weight | 3,800 kg (8,377 lb) |
Specifications sourced from palmary.com — verified 2026-10-05
Strengths & Limitations
Strengths
- 255 mm wide wheels at 45 m/s (8,858 ft/min)
- Optional 20 HP (15 kW) grinding wheel motor
- Grinding wheel spindle in super precision cylindrical roller bearings, as described by Palmary
- 2 kW (2.7 hp) servo regulating wheel, 10 to 300 rpm
Limitations
- Standard motor is 15 HP (11 kW) for a wider wheel than on the PCB-4520
- Listed weight of 3,800 kg (8,377 lb) is identical to the narrower model, so confirm it
- Diamond roller dressing device is optional
- Enclosure and linear scale are options
Best For
Frequently Asked Questions
01
A Ø455 x 255 mm grinding wheel on a 228.6 mm bore and a Ø260 x 255 mm regulating wheel on a 101.6 mm bore. The grinding wheel has a linear velocity of 45 m/s (8,858 ft/min) and is dressed by a single-point device, with a diamond roller device optional.
02
The table lists 15 HP (11 kW) as standard and 20 HP (15 kW) as an option. Palmary gives no guidance on the page. Full-width infeed cuts on a 255 mm wheel load the motor far more than light through-feed passes, so base the choice on your heaviest job.
03
Not according to the table, which prints 3,800 kg (8,377 lb) in one cell for both the PCB-4520 and the PCB-4525. The coolant tank is 170 L (44.9 gal) on both.
04
Palmary describes the machine as a design for a maximum of 6 axes of CNC control and does not list the axes or their travels on this page. Ask which axes are included in the configuration quoted. The controller is a FANUC CNC.
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