GU-NC
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.
The spindle runs on precision bearings, assuring maximum spindle stability. It guarantees outstanding grinding accuracy for external dia., internal dia. (optional) & end face.
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.
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.
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 |
|---|---|
| Capacity | |
| 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) |
| Tailstock | |
| Center taper | M.T. No. 3 |
| Stroke | 20 mm |
| Fine adjustment range | ±0.03 mm |
| Motor | |
| 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) |
| Power | |
| Total voltage | 7 KVA |
| Tank | |
| 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.
