Used Sumitomo CNC Vertical Grinder | 2000mm Table

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Product Highlight

This used SUMITOMO twin-wheelhead CNC vertical grinding machine from Japan is designed for precision grinding of large and heavy workpieces. Equipped with a 2000 mm rotary table, up to 2500 mm external grinding diameter, 400–2000 mm internal grinding capacity, and a 3500 kg table load, it is suitable for ID, OD, face, taper and profile grinding in one large-capacity machine.

Product Description

Used SUMITOMO twin-wheelhead CNC vertical grinding machine from Japan is designed for precision grinding of large and heavy workpieces. Equipped with a 2000 mm rotary table, up to 2500 mm external grinding diameter, 400–2000 mm internal grinding capacity, and a 3500 kg table load, it is suitable for ID, OD, face, taper and profile grinding in one large-capacity machine.

The twin grinding-head configuration makes it particularly suitable for large bearing rings, gear components, precision rings and other heavy industrial parts where multiple grinding operations are required.

Technical Specifications

Specification	Details
Machine Type	CNC Vertical Grinding Machine
Configuration	Twin Grinding Heads / Twin Wheelheads
Brand	SUMITOMO*
Country of Origin	Japan
Condition	Used / Pre-owned
Rotary Table Diameter	2,000 mm
Maximum External Grinding Diameter	2,500 mm
Internal Grinding Diameter	400–2,000 mm
Maximum Machining Height	700 mm, including approx. 200 mm tooling height
Maximum Table Load	3,500 kg
Table Rotation Speed	1–30 rpm
Table Rotation	Forward / Reverse
Approx. Machine Footprint	7,600 × 6,000 mm
Approx. Machine Height	5,000 mm
Approx. Machine Weight	55,000 kg
Grinding Capability	ID, OD, face, taper, angled bore and profile grinding

Left Grinding Head

Specification	Details
Grinding Wheel Size	Ø450 × 125 × Ø203.2 mm
Maximum Wheel Width	Up to 270 mm
Wheel Discard Diameter	Approx. Ø350 mm
Spindle Speed	1,500–2,500 rpm
Vertical Travel	1,090 mm
Grinding Head Swivel Angle	±15°
Swivel Speed	1–80°/min
Horizontal Travel Reference	Up to approx. 1,950 mm toward left from table center
Horizontal Feed Speed	1–6,000 mm/min
Vertical Feed Speed	1–1,500 mm/min
Handwheel Increment ×1	0.001 mm/div
Handwheel Increment ×10	0.01 mm/div
Handwheel Increment ×100	0.1 mm/div

Right Grinding Head

Specification	Details
Grinding Wheel Size	Ø450 × 125 × Ø203.3 mm
Spindle Speed	1,500–2,500 rpm
Vertical Travel	820 mm
Horizontal Travel from Table Center	Approx. 1,700 mm right / 70 mm left
Horizontal Feed Speed	1–6,000 mm/min
Vertical Feed Speed	1–1,500 mm/min
Handwheel Increment ×1	0.001 mm/div
Handwheel Increment ×10	0.01 mm/div
Handwheel Increment ×100	0.1 mm/div

Auxiliary Grinding / Dressing System

Specification	Details
Auxiliary Feed Speed	1–500 mm/min
Maximum Auxiliary Travel	120 mm
Dresser Swivel Range	±90°
Maximum Dressing Travel	55 mm
Angular Handwheel Increment ×1	0.001°/div
Angular Handwheel Increment ×10	0.01°/div
Angular Handwheel Increment ×100	0.1°/div

CNC & Electrical System

Specification	Details
CNC Brand	FANUC
Current Control Shown in Machine Photo	FANUC Series 31i-MODEL B
Original Manual Reference	FANUC 16TB, 2-system, 8-axis
Simultaneously Controlled Axes	3 axes according to original documentation
Minimum Linear Setting Unit	0.001 mm
Minimum Rotary Setting Unit	0.001°
Main Power Supply	3-phase AC 200 V, 50 Hz
Main Circuit	3-phase AC 200 V, 50 Hz
Control Circuit	Single-phase AC 100 V, 50 Hz
Total Electrical Capacity	Approx. 130 kVA
Maximum Demand Factor	70%
Table Drive Motor	11 kW
Left Grinding Spindle Motor	22 / 30 kW
Right Grinding Spindle Motor	15 / 18.5 kW

Grinding Functions & Applications

This large used Japanese vertical grinder is designed for customers who need to process large-diameter, heavy and high-precision components without moving the workpiece between several machines.

Typical grinding operations include:

Internal diameter grinding – ID grinding
External diameter grinding – OD grinding
Flat and face grinding
Taper grinding
Angled bore grinding
Profile and contour grinding
Plunge grinding
Traverse grinding
Radius and form dressing

The twin-wheelhead design can reduce repeated workpiece clamping and is especially useful when several surfaces on the same large component require precision grinding.

Suitable Workpieces

This machine is particularly suitable for:

Large bearing rings and races
The 2000 mm rotary table and 2500 mm maximum external grinding capacity make the machine suitable for large bearing components requiring ID, OD and face finishing.

Slewing rings and large precision rings
Suitable for heavy ring-shaped components used in construction machinery, energy equipment and large mechanical assemblies.

Large gears and gear rings
Useful for precision finishing of cylindrical, internal and end-face surfaces on large gear components.

Large flanges and circular components
The 3500 kg table capacity allows machining of relatively heavy circular parts.

Heavy machinery precision components
Suitable for components requiring multiple precision surfaces to be ground on one machine.

Why Buyers Consider This Used Vertical Grinder

For manufacturers that need large grinding capacity but want to avoid the investment and lead time associated with purchasing a comparable new machine, this used SUMITOMO CNC vertical grinder provides a practical option.

Its key advantages include a 2-meter rotary table, 2.5-meter external grinding capacity, twin grinding heads, large internal grinding range, 3.5-ton workpiece capacity and FANUC CNC control.

For buyers processing large bearing rings, gear rings and heavy precision components, these specifications can significantly expand in-house large-diameter grinding capability.

FAQ

Can this used SUMITOMO vertical grinder perform both ID and OD grinding?

Yes. According to the supplied machine specifications, it can perform internal and external cylindrical grinding, together with face, taper, angled and profile grinding. Its internal grinding range is approximately 400–2000 mm, while the maximum external grinding diameter is approximately 2500 mm.

What is the largest workpiece this vertical grinding machine can handle?

The machine has a 2000 mm diameter rotary table, a maximum external grinding diameter of approximately 2500 mm, a maximum machining height of around 700 mm, and a maximum table load of 3500 kg.

Does this used vertical grinder have a FANUC CNC control?

Yes. The current machine photo shows a FANUC Series 31i-MODEL B control panel. The supplied original Japanese documentation references a FANUC 16TB 8-axis system, so buyers should confirm the final installed control configuration before purchase.

Is this machine suitable for grinding large bearing rings?

Yes. Large bearing rings are one of the main applications for this type of large CNC vertical grinding machine. The combination of a large rotary table, ID/OD grinding capability and twin grinding heads is well suited to large bearing rings, precision rings and similar circular components.