This centerless grinding machine is applicable for centerless through-feed grinding of cylindrical part, and in-feed grinding of cone and rotary part. It's applicable for mass production. It can also be used for centerless in-feed grinding of cone-shaped parts with conicity no more than 1:20 and the formed rotational parts once the in-feed grinding mechanism is added.
I. Structural Characteristics and Performance of Machine Tools
1. Grinding wheel’s spindle bearing is a five-piece dynamic-pressure sliding bearing, with large bearing capacity and high rigidity;
2. Guide wheel’s spindle bearing is a 1: 30 integral sliding bearing, with large bearing capacity and high precision;
3. Variable speed of guide wheel adopts AC frequency conversion speed regulation, which can realize stepless speed adjustment;
4. Trimming machines for both grinding wheel and guide wheel adopt hydraulic transmission and stepless speed adjustment.
5. The machine tool is equipped with automatic cutting grinding device, able to execute semi-automatic and automatic cycle work.
| Diameter of grinding | Through-feed grinding | 5～50mm |
| In-feed | 7～50mm | |
| Max grinding length（standard bracket） | Through-feed grinding | 120mm |
| In-feed | 120mm | |
| Specification of grinding wheel | P400x150x230mm | |
| Specification of guide wheel | PSA300×150×127mm | |
| Rotation speed of grinding wheel | 1668r/min | |
| Rotation speed of guide wheel (stepless speed) | 20～200r/min | |
| Rotation angle of guide wheel | In vertical plane | -2°～ +5° |
| In horizontal plane | -1°～ +3° | |
| Feed rate of feed hand wheel per division | 0.002mm | |
| In-feed travel amount | Total stroke volume | 3.5mm |
| Fast speed stroke volume | 2～3.5mm | |
| Low speed stroke volume | 0～1.5mm | |
| Distance from the center of grinding wheel and regulating wheel to the bottom surface of bracket | 220mm | |
| Total power (13.81kw) | Motor for grinding wheel | 11kw |
| Motor for guide wheel | 1.5kw | |
| Hydraulic motor | 1.1kw | |
| Lubrication motor | 0.09kw | |
| Cooling motor | 0.12kw | |
| Power source | 3N～50Hz 380V | |
| Machine tool’s overall dimension | 1920x1681x1479mm | |
| Net weight of machine tool | 2800kg | |
| Work accuracy (Standard test piece Φ20x90mm,45# steel) |
Roundness | 0.002mm |
| Cylindricity | 0.003mm | |
| Roughness | Ra0.32μm | |