Cylindrical Grinder



NC Series

400 mm

Distance between centers

Ø210 mm

Swivel over table

Ø200 mm

Max. external grinding dia.


PALMARY high precision cylindrical grinders are unmatched in structural rigidity and stability, grinding accuracy and operational convenience. Each machine provides maximum operational flexibility thereby allowing for various grinding operations. You will get extra value when putting a PALMARY cylindrical grinder on your production line.


Stable and rigid spindle head

The spindle runs on precision bearings, assuring maximum spindle stability. It guarantees outstanding grinding accuracy for external dia., internal dia. (optional) & end face.


Special hydrostatic bearing

The wheel spindle runs by using a special hydrostatic bearing and is especially ideal for precision grinding work. It features high speed, no friction between metals, no heat generation, deformation-free, extra high accuracy and continual use.

Precision wheel head

Precision wheel head

The grinding wheel spindle is precision machined from high quality alloy steel, normalized, tempered, carburized and sub-zero treated, precision ground and mirror-effect treated.


Various grinding application

One grinder allows straight plunge grinding, shoulder grinding, traverse grinding, end face grinding, taper grinding & internal grinding (optional) functions for different machining purpose.



Model GU20x40NC
Swivel over table Ø210 mm
Distance between centers 400 mm
Max. external grinding diameter Ø200 mm
Max. load of centers 60 kgs
Grinding wheel
O.D. x width x I.D. Ø355 x 38 x Ø127 mm
Linear velocity 45 M/s
Grinding wheel - X axis
Manual distance 135 mm
Auto. rapid advance 25 m/min
Max. stroke 185 mm
Min. setting unit 0.001 mm
One turn of handwheel (graduation) 2 (0.005) mm
Table - Z axis
Traverse speed 1.5 m/min
Max. stroke 480 mm
Auto. reciprocate min. stroke 8 mm
Feed of one turn of handwheel (2-step) 20 mm (2 mm)
Swivel angle -3° , +12°
Work spindle head
Swivel angle -30° ~ +90°
Center taper M.T. No. 3
Spindle speed (variable) 10~300 r.p.m.
Max. load of spindle (tool holder included) 15 kgs (max. length: 100 mm)
Center taper M.T. No. 3
Stroke 20 mm
Fine adjustment range ±0.03 mm
Wheel spindle 2.2 kW (4P)
Work spindle (AC Servo Motor) 0.37 kW (4P) Frequency 
Hydraulic pump 0.37 kW (4P)
Wheel spindle lubrication pump 0.18 kW (4P)
Coolant pump 0.18 kW (2P)
Internal grinding spindle (opt.) 0.18 kW (2P)
Total voltage 7 KVA
Wheel spindle lubricant tank 7 L
Hydraulic tank 46 L
Coolant tank 110 L
Machine weight
New weight 2000 kgs

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

  • Grinding wheel and flange x 1
  • Grinding wheel inverter x 1
  • Diamond tool holder (table mounted type) x 1
  • Carbide tipped work centers x 2
  • Electric system x 1
  • Hydraulic tank with pump x 1
  • Coolant tank with pump x 1
  • Work lamp x 1
  • Tools (Leveling pad) and tool box x 1
  • Internal grinding attachment (included one spindle)
  • Diamond tool holder for internal and external grinding wheel dressing (upward open type)
  • Diamond tool holder (tailstock mounted type)
  • Diamond tool holder for internal and external grinding wheel dressing (sideward open type)
  • Angle trimming device
  • Radius trimming device
  • Cam locked driving dogs (6 pcs/set)
  • Work steady rest (2 pcs/set)
  • 2-point steady rest
  • 3-point steady rest
  • Adjustable 3-jaw scroll chuck
  • Adjustable 4-jaw scroll chuck
  • Magnetic coolant separator
  • Magnetic coolant separator with paper filter
  • Wheel forming device (Manual type, without auto. compensation)
  • Wheel forming device (For NC model, with auto. compensation)
  • Wheel balancing stand and arbor
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