Cylindrical grinding machine OGC series

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INTRODUCTION
TOPKING CNC Cylindrical Grinder OGC series is designed for high-precision external cylindrical grinding of shafts and similar components. X- and Z-axes are driven by precision ball screws and servo motors. The machine integrates a high-performance CNC control with a graphical GUI to simplify programming and process setup for production environments.

▎CAPACITY — OGC-1240 | OGC-1640
Swing Over Table: Ø320 mm | Ø420 mm
Distance Between Centers: 1000 mm
Max. Grinding Diameter: Ø300 mm | Ø400 mm
Max. Grinding Length: 1000 mm
Grinding Wheel Size: Ø405 x 50 x Ø127 mm


▶ MACHINE FEATURES

USER-FRIENDLY CNC INTERFACE
▪ Built-in Mitsubishi CNC with graphical guidance to break complex components into multiple grinding processes, simplifying process editing and dressing without extensive G/M code programming.

RIGID MACHINE BASE
▪ Optimized structure for enhanced stability and repeatability in industrial use.

HYDROSTATIC LUBRICATION
▪ Automatic hydrostatic lubrication for table and wheelhead slideways to improve smoothness and feed precision.

WHEELHEAD CONSTRUCTION
▪ G.W. spindle manufactured from SNCM-220 alloy steel with heat treatments and cryogenic processing; precision ground and mirror finished, surface hardness > HRC62 for long-term accuracy.

WORKHEAD & TAILSTOCK
▪ Precision bearings
▪ Servo-driven workhead with infinite speed variation
▪ Fixed-type spindle for accuracy
▪ Tailstock with oil-bath lubrication and oil gauge for monitoring.

DIAMOND TOOL HOLDER
▪ Tailstock-mounted diamond holder; multiple dressing devices available to match component requirements.


▶ SPECIFICATIONS — OGC-1240 | OGC-1640

Capacity
- Swing Over Table: Ø320 mm | Ø420 mm
- Distance Between Centers: 1000 mm
- Max. Grinding Diameter: Ø300 mm | Ø400 mm
- Max. Grinding Length: 1000 mm
- Max. Load Held Between Centers: 100 kg | 150 kg
- Center Height (table to center tip): 160 mm | 210 mm

Grinding Wheel
- Size (O.D. x Width x I.D.): Ø405 x 50 x Ø127 mm
- Linear Velocity: 45 m/sec

Worktable
- Swiveling Angle: -3° ~ +8°

Workhead
- Swiveling Angle: -30° ~ +90°
- Center Taper: MT No. 4
- Spindle Speed: 10 ~ 300 rpm
- Max. Load of Spindle (tool holder included): 35 kg (max. length:150 mm)

X-axis Travel
- Max. Travel: 250 mm
- Rapid Feedrate Speed: 6000 mm/min
- Auto. Feeding Speed: 0.001 ~ 2000 mm/min
- Min. Feeding Setting: 0.001 mm

Z-axis Travel
- Max. Travel: 1315 mm
- Rapid Feedrate Speed: 6000 mm/min
- Auto. Feeding Speed: 0.001 ~ 2000 mm/min
- Min. Feeding Setting: 0.001 mm

Drive Motors
- Grinding Wheel Spindle: 3.75 kW (5.5 kW)
- Workhead Spindle Motor (servo motor): 1.3 kW (AC servo motor)
- Wheelhead Feed X-axis (servo motor): 1.5 kW (AC servo motor)
- Table Feed Z-axis (servo motor): 1.5 kW (AC servo motor)
- Wheel Spindle Lubrication Oil Pump: 0.18 kW
- Lubrication Oil Pump: 0.075 kW
- Coolant Pump: 0.18 kW

Tank Capacities
- Wheel Spindle Lubrication Oil Tank: 18 L
- Lubrication Oil Tank: 22 L

Machine
- Dimension (L x W x H): 4250 x 2470 x 2306 mm
- Net Weight: 4300 kg | 4500 kg
- Center Height (floor to center tip): 1095 mm | 1145 mm

* The mentioned specifications & dimensions are subject to change without notice.


▶ ACCESSORIES

STANDARD ACCESSORIES

• CNC Controller (Brand: Mitsubishi) x 1 set
• Grinding Wheel and Flange x 1 set
• Carbide Tipped Work Centers (2 pcs/set) x 1 set
• Diamond Tool Holder (tailstock mounted type) x 1 set
• Linear Scale for X-axis x 1 set
• Grinding Wheel Inverter x 1 set
• Electric System x 1 set
• Fully Enclosed Splash Guard x 1 set
• Lubrication System x 1 set
• Coolant System x 1 set
• Work Lamp x 1 set
• Tools (Leveling pad) and Tool Box x 1 set

OPTIONAL ACCESSORIES

• Internal Grinding Attachment (incl. one spindle and G.W. inverter)
• Hydraulic Tailstock
• Cam-locked Driving Dogs
• Work Holder 2 pcs/set
• 2-point Steady Rest
• Adjustable 3-point Steady Rest
• Adjustable 3-jaw Scroll Chuck
• Adjustable 4-jaw Scroll Chuck
• Wheel Balancing Stand and Arbor
• Auto. Grinding Wheel Balancer
• Spare Grinding Wheel and Flange
• Roller Dresser Device
• Touch Probe Gauge
• Auto. In-Process Gauge
• Gap Control
• Magnetic Coolant Separator
• Paper Filter
• Oil Mist Collector