Audited Supplier
Centerless Grinders Economic Servo Type PC-12S
| Model | PC-12S |
| Grinding Wheel | |
| Standard grinding range (dia.) | Ø1~Ø40 mm |
| Capacity increases with special arrangement | Ø30~Ø60 mm |
| Grinding wheel size (O.D. x width x I.D.) | Ø305 x 150 x Ø120 mm |
| Linear velocity | 33 M/s |
| Grinding wheel motor | 7.5HP x 4P (5 kW) |
| Regulating Wheel | |
| Regulating wheel size (O.D. x width x I.D.) | Ø205 x 150 x Ø90 mm |
| Regulating wheel speed | 10~300 r.p.m. (variable speed) |
| Regulating wheel motor | 1.5 kW servo motor |
| Regulating wheel tilt angle | ±5° |
| Regulating wheel swivel angle | ±5° |
| Handwheel Graduation | |
| Upper slide feed graduation | 4 mm/rev / 0.025 mm/graduation |
| Upper slide micro-feed graduation | 0.1 mm/rev / 0.001 mm/graduation |
| Lower slide feed graduation | 7 mm/rev / 0.05 mm/graduation |
| Lower slide micro-feed graduation | 0.2 mm/rev / 0.001 mm/raduation |
| Trimming device graduation | 1.25 mm/rev / 0.01 mm/graduation |
| Motor | |
| Hydraulic pump motor | 1HP x 4P |
| Coolant motor | 1/8HP x 2P |
| Lubrication | Manual Lubricator |
| Tank | |
| Coolant tank | 100 L |
| Hydraulic tank | 53 L |
| Lubrication | 0.6 L |
| Weight | |
| New weight | 1700 kgs |
Introduction
Centerless Grinders Economic Servo Type PC-12S Series is a high-quality grinder manufactured by Palmary. Different from traditional standard models, this series of grinders adopt servo motor to drive the regulating wheel speed, featuring low rotational speed and high torque. This improves the operation of the regulating wheel more precise and easier to operate. Its economical mechanical structure makes it an affordable choice for machining.
Precision Spindles
- The GW spindle and the RW spindle are precision machined and made from alley steel (SNCM-220), processed with normalization, aging, and heat treatment, then proceed to sub-zero treatment, finally finished after precision machining and grinding.
- The internal hardness of the spindle is tempered to HRC 25°~30°. The surface hardness is up to HRC 62°. The spindle is resistant to heavy cutting and precision grinding, with strong torque, durability, no deformation, and wear resistance.
Feed Screw
The feed screw is manufactured from alloy steel. It's also normalized, high frequency harden and precision ground in order to have high feeding accuracy and excellent wear resistance. 
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. 
Lubrication System
The automatic lubricator provides lubrication to the GW spindle. Also all slideways are lubricated by a centralized lubrication system, ensuring proper lubrication and feeding accuracy.
