Centerless Grinder

GC-5020 / 5025


Manual Servomotor

Dia. Ø1~80

Standard grinding range (mm)

Ø510 x 205/255 x Ø304.8

Grinding wheel size (mm)

Ø305 x 205/255 x Ø127

Regulating wheel size (mm)


If you are serious about grinding accuracy and efficiency, the centerless grinders from PALMARY will meet your stringent challenges. The NC-controlled model is quality constructed throughout for delivering the operational performance that you expect.

The machine structure is manufactured from high-quality Meehanite cast iron, heat treated and stress relieved before machining, to make sure the high rigidity.


Precision Spindles

The GW spindle and the RW spindle are precision machined and made from alley steel, processed with normalization, aging, and heat treatment, then proceed to sub-zero treatment, finally finished after precision machining and grinding.


Pressure Switch

When starting the GW and RW spindle, this pressure switch allows starting only when oil enters into bearings thereby providing safety protection for the spindle bearings.


Feed Screw

The feed screw is manufactured from alloy steel. It's also normailzed, high frequency harden and precision ground in order to have high feeding accuracy and excellent wear resistance.


Lubrication system

The automatic lubricator provides lubrication to the GW spindle. Also all slideways are lubricated by a centerlized lubrication system, ensuring proper lubrication and feeding accuracy.



Model GC-5020 GC-5025
Grinding Wheel
Standard grinding range (dia.) Ø1~Ø80 mm
Capacity increases with special arrangement Ø40~Ø150 mm
Grinding wheel size (O.D. x width x I.D.) Ø510 x 205 x Ø304.8 mm Ø510 x 255 x Ø304.8 mm
Linear velocity 33 M/s
Grinding wheel motor 20HP x 4P (15 kW)
Regulating Wheel
Regulating wheel size (O.D. x width x I.D.) Ø305 x 205 x Ø127 mm Ø305 x 255 x Ø127 mm
Regulating wheel speed 10~300 r.p.m. (variable speed)
Regulating wheel motor 3 kW servo motor
Regulating wheel tilt angle ±5°
Regulating wheel swivel angle ±5°
Handwheel Graduation
Upper slide feed graduation 3.5 mm/rev / 0.05 mm/graduation
Upper slide micro-feed graduation 0.1 mm/rev / 0.001 mm/graduation
Lower slide feed graduation 9 mm/rev / 0.05 mm/graduation
Lower slide micro-feed graduation 0.2 mm/rev / 0.001 mm/graduation
Trimming device graduation 2 mm/rev / 0.01 mm/graduation
Hydraulic pump motor 1HP x 4P
Coolant motor 1/4HP x 2P
Lubrication Manual Lubricator
Coolant tank 170 L
Hydraulic tank 88 L
Lubrication 0.6 L
New weight 4400 kgs

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

  • Regulating wheel and flange x 1
  • Grinding wheel and flange x 1
  • Infeed work rest and carbide blade x 1
  • Thrufeed work rest and carbide blade x 1
  • Electric system x 1
  • Hydraulic tank with pump x 1
  • Coolant tank with pump x 1
  • Diamond tools (2 pcs/set) x 1
  • Work lamp x 1
  • Tools (Leveling pad) and tool box x 1
  • Spare grinding wheel flange
  • Spare regulating wheel flange
  • Large work rest (thrufeed grinding) L : 250~500 mm
  • Infeed grinding large workrest
  • Wheel balancing stand and arbor
  • Profile grinding attachment
  • Auto. infeed attachment
  • Manual feeder for infeed grinding (up and down)
  • Hydraulic work ejector (infeed grinding)
  • Auto. loading and unloading attachment (infeed grinding)
  • Auto. loading attachment (thrufeed grinding) (Ø5~20 mm, L100~600 mm)
  • Auto. unloading attachment (thrufeed grinding)
  • Auto. feeder for thrufeed grinding (hopper type) (Ø2~8 mm, L50~180 mm)
  • Vibratory feeder (thrufeed grinding)
  • V type supporter for long bar grinding (Ø2~14 mm)
  • Magnetic coolant separator
  • Paper filter
  • Hydrocyclone coolant separator
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