pcb-4520-6 PCB-4520-5

CNC Centerless Grinder

PCB-4520 / 4525


CNC Series

Dia. Ø1~80

Standard grinding range (mm)

Ø455 x 205/255 x Ø228.6

Grinding wheel size (mm)

Ø260 x 205/255 x Ø101.6

Regulating wheel size (mm)


The CNC Series Bearing Type Spindle Centerless Grinders offer high rigidity and precision with multi-axis CNC control, driven by servo motors for convenience and accurate positioning. The use of high-accuracy NN bearings in the grinding wheel spindle ensures both precision and rigidity.

Compared to the FCL series, this Centerless Grinding Machine achieves a significant 26% energy saving, reducing production costs and environmental impact. CNC technology allows flexible and efficient operation, making it suitable for various industries like machining, mold manufacturing, and automotive, providing high-quality processing solutions.

Palmary's CNC Series Bearing Type Spindle Centerless Grinder combines CNC technology and Centerless Grinding Machines, delivering high performance, accuracy, and energy efficiency for an excellent processing experience.


High accuacry

High grinding accuracy and rigidity design for max. 6 axes CNC control bearing spindle type grinder for wide range application.


High stability

The best configuration for machine bed and structural support ribs make the grinding accuracies more stability and reach higher accuracy level.


Bearing spindle type

The machine has the grinding wheel spindle single bearing holding type equipped with super precision cylindrical roller bearings make centerless grinding easier and more accurate than ever before.



For different auto application, the high speed loading & unloading attachment is optional to equop.



Model PCB-4520 PCB-4525
Grinding Wheel
Standard grinding range (dia.) Ø1~Ø80 mm
Grinding wheel size (O.D. x width x I.D.) Ø455 x 205 x Ø228.6 mm Ø455 x 255 x Ø228.6 mm
Linear velocity 45 M/s
Dressing device Single-point dressing device / (opt.)Diamond roller dressing device
Lubrication Oil mist type
Regulating Wheel
Regulating wheel size (O.D. x width x I.D.) Ø260 x 205 x Ø101.6 mm Ø260 x 255 x Ø101.6 mm
Regulating wheel speed 10~300 r.p.m. (variable speed)
Regulating wheel tilt angle ±5°
Regulating wheel swivel angle ±0.5°
Regulating wheel dressing device swivel angle ±5°
Dressing device OFFSET 0~15 mm
Lower and upper slider Square slider, Ball screw + reducer
Grinding wheel motor 15HP x 4P (11 kW) / OPT. 20HP x 4P (15 kW)
Regulating wheel motor 2 kW servo motor
Coolant motor 0.186 (wheel cooling) / 0.093 (dressing cooling) 
G.W. lubrication Oil mist type
R.W. lubrication Oil grease type
Lubrication Auto lubricator (LUBE)
Coolant tank 170 L
Grinding wheel spindle lubrication system 1.0 L
Table slide lubrication 4.0 L
New weight 3800 kgs

The mentioned specifications & dimensions are subject to change without notice.

  • FANUC CNC controller x 1
  • Regulating wheel and flange x 1
  • Grinding wheel and flange x 1
  • Thrufeed work rest x 1
  • Thrufeed carbide blade x 1
  • Infeed work rest x 1
  • Infeed carbide blade x 1
  • Diamond tools (4 pcs/set) x 1
  • Electric system x 1
  • Lubrication system for spindle x 1
  • Coolant tank with pump x 1
  • Work lamp x 1
  • Tools (Leveling pad) and tool box x 1
  • Diamond roller device
  • Diamond roller
  • Wheel balancing stand and arbor
  • JIB crane for grinding wheel change
  • Linear scale
  • Auto in-process gauge
  • Auto loading and unloading system
  • Magnetic coolant separator
  • Paper filter
  • Hydrocyclone coolant separator
  • Oil mist collector
  • Water cooler
  • Fully enclosed splash guard
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