China High Precision Accuracy Cylindrical Grinding Machine External Grinder

Features of Structure and Performance
The hydraulic driving system adopts screw pump, so the machine can run smoothly with low noise.
The wheel head uses sleeve-type hydrodynamic bearing, gaining the features of high rotation precision and rigidity.
The feeding guideway uses plastic-coated guideway, improving the stability and vibration resistance in low-speed running.
The machine has the following features: high machining accuracy, rational overall layout, attractive appearance, centralized and visualized operating handles, and simple and safe operation.
The semi-automatic machines, whose cutting grinding and longitudinal grinding can be controlled by the sizematic system or automatic gauge, are suitable for processing small-lot or batched parts. All the grinding functions and movement sequences in the machining cycle are controlled by PLC (Programmable Logic Controller).
Working Accuracy

No.
Inspection content
Sketch of test-piece and machining condition
Inspection Item
UnitMC1320Bx500x750x1000M1
Grinding accuracy of test-piece between centers L=350
d=35
Roundnessmm0.0015--L=750
d=75--0.0025L=350
d=35
Consistency of the diameter in longitudinal sectionmm0.005--L=750
d=75--0.008-
RoughnessμmRa≤0.32M2
Grinding accuracy of short test-piece fixed on the chuck L=30
d=60
Roundnessmm0.0025-
RoughnessμmRa≤0.32M3
The accuracy of test piece internal grinding on chuck L=50
d=30
Roundnessmm0.0025
Consistency of the diameter in longitudinal sectionmm0.005-
RoughnessμmRa≤0.63
Specifications

Item
UnitMC1320B5007501000Basic ParametersCenter heightmm125Distance between centersmm5207651080Max. swiveling diametermmΦ240External grinding rangemmΦ5-Φ200Internal grinding rangemmΦ13-Φ80Max. internal grinding lengthmm125Max. weight between centerskg50Max. loading on chuckkg30Worktable
Max. swing angleCounter-clockwise°987Clockwise°983Range of hydraulic moving speedm/min0.1-3Travel of worktable per revolutionmm≈10Wheel head
Max. swing angleCounter-clockwise°3Clockwise°3Overtravel movementmm≈150Manual feed travelmm70Rapid hydraulic travelmm35
Transverse feedingTravel per revolutionmm1Micro feeding amountmm0.002Internal grinding toolsRotation speed of spindler/min9245,12250,14848Grinding wheel
External grindingMax. diameter of wheelmm400Min. diameter of wheelmm280Width of wheelmm32-50Inner diameter of wheelmm203Max. linear speedm/s35Internal grinding(x)
Max. size of wheel (ODxW)mm50x32HeadstockRotation speed of spindler/min63, 125, 250, 500()Max. swing angle (Counter-clockwise)°90Spindle taperMorseNo.4TailstockRetraction of sleevemm25Taper of centerMorseNo.4Hydraulic systemFlow of pumpL/min14System working pressureMPa0.8-1Capacity of oil tankL≈140≈170≈200Coolant systemFlow of oil pumpL/min22Capacity of coolant tankL130Motors
External grinding motorPowerkW4Rotation speedr/min1500
Internal grinding motorPowerkW0.55Rotation speedr/min3000
Headstock motorPowerkW0.75Rotation speedr/min1000
Oil pump motorPowerkW1.1Rotation speedr/min1500
Coolant motorPowerkW0.125Rotation speedr/min3000OthersNet weightkg202024203000Gross weightkg273031303530
Overall dimension of the machineGrinding length 500mmmm1800x1415x1420Grinding length 750mm2290x1415x1420Grinding length 1000mm2800x1415x1420
Packing dimensionGrinding length 500mmmm2690x2000x2050Grinding length 750mm2810x2000x2050Grinding length 1000mm3950x2150x2280