gc-4520

Centerless Grinder

GC-4520 / 4525

GC

Manual Servomotor

Dia. Ø1~80

Standard grinding range (mm)

Ø455 x 205/255 x Ø228.6

Grinding wheel size (mm)

Ø255 x 205/255 x Ø111.2

Regulating wheel size (mm)

INTRODUCTION

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.

 
FEATURES
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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.

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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.

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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.

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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.

VIDEO

CENTERLESS GRINDER

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SPECIFICATIONS
Model GC-4520 GC-4525
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.) Ø455 x 205 x Ø228.6 mm Ø455 x 255 x Ø228.6 mm
Linear velocity 33 M/s
Grinding wheel motor 15HP x 4P (11 kW)
Regulating Wheel
Regulating wheel size (O.D. x width x I.D.) Ø255 x 205 x Ø111.2 mm Ø255 x 255 x Ø111.2 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
Motor
Hydraulic pump motor 1HP x 4P
Coolant motor 1/4HP x 2P
Lubrication Manual Lubricator
Tank
Coolant tank 170 L
Hydraulic tank 88 L
Lubrication 0.6 L
Weight
New weight 3700 kgs

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

STANDARD
ACCESSORIES
  • 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
OPTIONAL
ACCESSORIES
  • 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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