Used OKAMOTO PSG-105DX Automatic Surface Grinder | Japan

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Product Highlight

Used OKAMOTO PSG-105DX is a Japanese automatic precision surface grinder with a 1016 × 500 mm worktable, hydraulic table movement, and adjustable grinding feeds. Designed for precision flat grinding, it is a cost-effective option for mold manufacturing, toolrooms, and industrial metalworking applications.

Product Description

Used OKAMOTO PSG-105DX features a 1016 × 500 mm worktable, 1150 × 540 mm table travel, and automatic grinding feeds. With hydraulic table movement, fine vertical infeed control, and a rated table load of 700 kg including the magnetic chuck, it is a practical choice for mold making, precision tooling, and industrial flat grinding applications.

Technical Specifications

General Information & Grinding Capacity

Parameter	Specification
Brand	OKAMOTO
Manufacturer	Okamoto Machine Tool Works, Ltd.
Model	PSG-105DX
Series	GRIND-X
Machine Type	Automatic Precision Surface Grinder
Condition	Used / Second-Hand
Brand Origin	Japan
Worktable Size (L × W)	1016 × 500 mm
Table Travel (Longitudinal × Cross)	1150 × 540 mm
Standard Magnetic Chuck Dimensions	1000 × 500 × 100 mm
Rated Maximum Table Load	700 kg (including magnetic chuck)
Standard Magnetic Chuck Weight	320 kg
Distance from Table Surface to Wheel Bottom (50 Hz)	22.5–522.5 mm
Distance from Table Surface to Wheel Bottom (60 Hz)	47.5–547.5 mm

Table Movement & Feed System

Parameter	Specification
Table T-Slots	3 slots × 17 mm width
Longitudinal Table Speed	3–25 m/min
Longitudinal Manual Feed per Handwheel Revolution	47 mm
Cross Manual Feed per Handwheel Revolution	5.0 mm
Cross Feed Dial Graduation	0.02 mm
Automatic Crossfeed – Intermittent Increment	0.5–20 mm
Automatic Crossfeed – Continuous Speed	0.2–1.0 m/min

Grinding Wheelhead & Vertical Feed

Parameter	Specification
Automatic Rough Grinding Infeed	0.001–0.03 mm (12 steps)
Automatic Fine Grinding Infeed	0.0001–0.01 mm (11 steps)
Manual Vertical Infeed per Handwheel Revolution	0.01 / 0.1 / 1.0 mm (selectable)
Vertical Feed Dial Graduation	0.0001 / 0.001 / 0.01 mm
Spark-Out Cycles	0–5
Rapid Vertical Feed Speed	600 mm/min

Grinding Wheel Specifications

Parameter	Specification
Grinding Wheel Size (50 Hz)	Ø355 × 38 × Ø127 mm
Grinding Wheel Size (60 Hz)	Ø305 × 38 × Ø127 mm
Grinding Wheel Speed (50 Hz)	1500 rpm
Grinding Wheel Speed (60 Hz)	1800 rpm

Motors & Electrical System

Parameter	Specification
Grinding Spindle Motor	3.7 kW, 4-pole
Hydraulic Pump Motor	2.2 kW, 4-pole
Vertical Rapid Feed / Infeed Motor	0.4 kW AC servo motor
Air-Cooled Oil Cooler Power (50 Hz)	90 W
Air-Cooled Oil Cooler Power (60 Hz)	105 W
Power Supply Option 1	3-phase, 200V ±10%, 50/60 Hz
Power Supply Option 2	3-phase, 220V ±10%, 60 Hz
Rated Power Requirement	11 kVA

Machine Dimensions & Weight

Parameter	Specification
Machine Length	4524 mm
Machine Width	2546 mm
Machine Height	Approx. 2059 mm
Machine Weight	Approx. 4800 kg

Technical note: Specifications represent the stated machine-model configuration. The actual magnetic chuck, accessories, electrical setup, machine condition, and achievable grinding accuracy should be confirmed for the specific used unit. Feed increments are control specifications, not guaranteed machining tolerances.

Applications & Industries

Used OKAMOTO PSG-105DX is designed for precision flat grinding of medium to large metal components. Its 1016 × 500 mm worktable, hydraulic table movement, and adjustable automatic grinding feeds make it suitable for a variety of industrial machining applications.

Mold and Die Manufacturing

Suitable for flat grinding of mold plates, die components, and precision tooling surfaces requiring consistent machining and surface finishing.

Precision Machinery Manufacturing

Used for grinding machine guide plates, steel plates, fixtures, and other mechanical components requiring accurately finished flat surfaces.

Tool and Fixture Production

A practical solution for toolrooms producing or maintaining precision fixtures, tooling plates, and suitable hardened steel components.

Industrial Component Reconditioning

Suitable for resurfacing and finishing selected machine components during equipment maintenance, repair, and rebuilding operations.

General Metalworking Workshops

Well suited to job shops and industrial manufacturers looking for automatic surface grinding capability and a large working table without the higher initial investment associated with a comparable new machine.

Typical Workpieces:

Mold and die plates
Precision steel plates
Machine guide plates
Tooling components
Industrial fixtures
Suitable hardened steel parts
Flat mechanical components

Workpiece compatibility depends on material, geometry, grinding wheel selection, workholding method, and machine condition.

FAQ

What is the maximum workpiece weight the PSG-105DX can handle?

The PSG-105DX has a rated maximum table load of 700 kg, including the magnetic chuck. With the specified 320 kg standard chuck, approximately 380 kg of rated load capacity remains before accounting for any additional fixtures. The actual allowable workpiece weight should be confirmed based on the installed equipment and machine condition.

What are the table and magnetic chuck dimensions of this surface grinder?

The PSG-105DX has a 1016 × 500 mm worktable and a table travel of 1150 × 540 mm. The specified standard magnetic chuck dimensions are 1000 × 500 × 100 mm. Buyers should confirm the actual chuck configuration and included accessories before purchasing.

Can the used OKAMOTO PSG-105DX grind hardened steel and precision mold components?

Yes, the PSG-105DX is suitable for flat grinding of appropriate hardened steel parts, mold plates, and precision tooling components when the correct grinding wheel and operating conditions are used. Actual grinding accuracy and surface finish depend on the machine condition, material, tooling, and grinding setup.