CNC series | OGC series

OGC-1280 | OGC-1680



TOPKING CNC Cylindrical Grinder - OGC series is your best choice for high precision grinding work. The X-axis and Z-axis are both driven by precision ball screws and servo motors. They are equipped with a high-performance CNC control system and a built-in graphical (GUI) operation interface. The grinding is widely applied, making the operation and processing closer to the needs of users. 


Swivel Over Table: Ø320 / Ø420 mm
Distance Between Center: 2000 mm
Max. Grinding Dia.: Ø300 / Ø400 mm
Grinding Wheel: Ø405 x 50 x Ø127 mm

Add Inquiry (0) Catalogue



The built-in advanced CNC control system is equipped with GUI. The operator can divide the complex component into several grinding processes through the guidance of the graphic, and simplify the process editing of grinding, and dressing in a numerical way. No complicated programming (G code, M code) is required, and the most convenient operating environment is provided.


■ The machine’s structure is different from the light weight design philosophy in the past; it substantially consolidates the rigidity of machine.

■ The slideways of the table and the wheel head are lubricated by an advanced automatic hydrostatical lubrication system.
■ The lubrication performance of the worktable and the wheelhead has been significantly enhanced, showcasing exceptional grinding smoothness. Moreover, with the optimized operational fluidity, it becomes possible to achieve higher precision in the feed rate, ensuring the accuracy of the machining process.

■ The G.W. spindle is made of high-quality alloy steel SNCM-220, which has undergone multiple treatments such as normalization, quenching and tempering, carburizing heat treatment, and cryogenic treatment. Afterwards, precision grinding and mirror treatment are carried out, and the surface hardness reaches above HRC62°. Guarantee no deformation, wear resistance, high precision forever.


■ The work spindle utilizes precision-grade bearings, showcasing optimal stability.
■ The  workhead is driven by a servo motor, enabling continuous and infinitely variable speed adjustments based on demand.
■The workhead features a fixed-type work spindle, enhancing accuracy and stability.
■ The tailstock lubrication adopts an oil-bath lubrication system, ensuring consistent high precision of the tailstock at all times.
■ The lubrication system is equipped with an oil gauge for convenient monitoring of oil quantity by operators.


 (tailstock mounted type)

■ Diverse dressing device is available, adaptable to the requirements of the component.




Swing Over Table Ø320 mm Ø420 mm
Distance Between Centers 2000 mm 2000 mm
Max. Grinding Diameter Ø300 mm Ø400 mm
Max. Grinding Length 2000 mm 2000 mm
Max. Load Held Between Centers 100 kg 150 kg
Center Height (from table to center tip) 160 mm 210 mm
Grinding Wheel
Size (O.D. x Width x I.D.) Ø405 x 50 x Ø127 mm Ø405 x 50 x Ø127 mm
Linear Velocity 45 m/sec 45 m/sec
Swiveling Angle -1° ~ +7° -1° ~ +7°
Swiveling Angle -30° ~ +90° -30° ~ +90°
Center Tapper MT. No. 4 MT. No. 4
Spindle Speed 10 ~ 300 rpm 10 ~ 300 rpm
Max. Load of Spindle (tool holder included)  35 kg (max. length:150 mm) 35 kg (max. length:150 mm)
Center Tapper MT. No. 4 MT. No. 4
Center Moving Manual type Manual Type
Tailstock Stroke 25 mm 25 mm
X-axis Travel
Max. Travel 250 mm 285 mm
Rapid Feedrate Speed 6000 mm/Min 6000 mm/Min
Auto. Feeding Speed 0.001 ~ 2000 mm/Min 0.001 ~ 2000 mm/Min
Min. Feeding Setting 0.001 mm 0.001 mm
Z-axis Travel
Max. Travel 2540 mm 2540 mm
Rapid Feedrate Speed 6000 mm/Min 6000 mm/Min
Auto. Feeding Speed 0.001 ~ 2000 mm/Min 0.001 ~ 2000 mm/Min
Min. Feeding Setting 0.001 mm 0.001 mm
Drive Motors
Grinding Wheel Spindle 3.75 kW (5.5 kW) 3.75 kW (5.5 kW)
Workhead Spindle Motor (servo motor) 1.8 kW (AC servo motor) 1.3 kW (AC servo motor)
Wheelhead Feed X-axis (servo motor) 1.5 kW (AC servo motor) 1.2 kW (AC servo motor)
Table Feed X-axis (servo motor) 3.5 kW (AC servo motor) 2.5 kW (AC servo motor)
Wheel Spindle Lubricant Pump 0.18 kW 0.18 kW
Hydraulic Pump 0.37 kW 0.37 kW
Coolant Pump 0.18 kW 0.18 kW
Tank Capacities
Hydraulic Pump 18 L 18 L
Coolant Tank 60 L 60 L
Machine 7285 x 2923 x 2072 mm 7285 x 2923 x 2072 mm
Net Weight 4800 kg 4800 kg
Center Height (from floor to center tip) 1095 mm 1135 mm

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



■ 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
■ Hydraulic System x 1 set
■ Coolant System x 1 set
■ Work Lamp x 1 set
■ Tools (Leveling pad) and Tool Box x 1 set


■ 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