Specifications

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SHENYANG MACHINE TOOL CO., LTD 31
5.2.5 Tailstock
The machine can be provided with three types of tailstock, i.e. manual tailstock,
hydraulic tailstock and pneumatic tailstock.
The manual tailstock is the same as the one used for the universal lathes, it is locked to
the bed by the principle of eccentricity, and by help of turning handwheel by hand to
make the leadscrew drive the tailstock can obtain tailstock spindle advancing and
backing.
Advancing and backing of the hydraulic tailstock and pneumatic tailstock are realized
according to the hydraulic principle and pneumatic principle. The limit switch used by
the tailstock base body can prevent the carriage from bumping with the tailstock.
5.2.6 Hydraulic System
5.2.6.1 Hydraulic Chuck and Tailstock
The machine can be provided with hydraulic chuck with changeable-clamping-force
and hydraulic tailstock to increase automation of the machine. The hydraulic tank is set
on the side of the headstock, and all hydraulic elements are produced by Taiwan
Northman Company. The hydraulic control valves with overlad type are mounted in
front of the oil tank, having compact in structure and convenient for installation.
 Major specifications of hydraulic system
Hydraulic motor
： Y90L－4（B5） 1.5 kW 1450 r/min
Hydraulic pump
： VPVC-F-20-A-2-02
Rated pressure: 1.5~3.5 Mpa
Delivery flow: 11.1 ml/r
Volume of oil tank
：90 L
Pressure of hydraulic system
：2.5 MPa
Overall dimension of oil tank
：600 mm × 460 mm × 800 mm
For hydraulic transmission principle, please refer to Fig. 5: Drawing of hydraulic
principle.
Hydraulic system of the machine is divided into two kinds: one is hydraulic chuck
with changeable-clamping-force and hydraulic tailstock, and the other is hydraulic
chuck with unchange-clamping-force and hydraulic tailstock. Users can select any
of them according to their own requirements. For the machine without hydraulic
tailstock, all other parts are the same with the machine that has the hydraulic
tailstock, except the overlad return of tailstock that should be got rid of
accordingly.
 Oil resource
The hydraulic system adopts VPVC variable blade pump made by Taiwan