Used Okamoto ACC84GX Surface Grinder | 800 × 400 mm

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Product Highlight

Used Okamoto ACC84GX is a automatic precision surface grinding machine from a Japanese machine tool brand. It features an 800 × 400 mm electromagnetic chuck, hydraulic table feed, automatic vertical downfeed, and double-V guideways. Designed for flat surface grinding in toolrooms, mold making, and precision metalworking, this pre-owned machine offers an alternative to investing in new grinding equipment.

Product Description

Used ACC84GX automatic precision surface grinding machine features an 800 × 400 mm electromagnetic chuck, hydraulic table movement, automatic grinding feed, and a rigid double-V guideway design. A practical choice for mold making, toolrooms, and precision metalworking shops seeking additional grinding capacity without the cost of buying new.

Technical Specifications

Parameter	Specification
Condition	Used / Pre-Owned
Brand	Okamoto
Model	ACC84GX / ACC-84GX
Manufacturer	Okamoto Machine Tool Works, Ltd.
Brand Origin	Japan
Machine Type	Automatic Precision Surface Grinder
Grinding Method	Surface and Traverse Grinding
Table Working Area	850 × 400 mm
Electromagnetic Chuck Size	800 × 400 mm
Maximum Longitudinal Travel	950 mm
Maximum Cross Travel	440 mm
Table Load Capacity	700 kg, including magnetic chuck
Longitudinal Table Feed Speed	0.3–25 m/min
Automatic Crossfeed, Step	0.5–20 mm
Continuous Crossfeed	0.2–1.0 m/min
Automatic Vertical Downfeed	0.0001–0.03 mm
Vertical Rapid Feed	600 mm/min
Grinding Wheel Size, 50 Hz	Ø355 × 38 × Ø127 mm
Grinding Wheel Size, 60 Hz	Ø305 × 38 × Ø127 mm
Standard Wheel Speed, 50/60 Hz	1,500 / 1,800 rpm
Standard Grinding Spindle Motor	3.7 kW
Grinding Wheel-to-Table Clearance, 50 Hz	22.5–522.5 mm
Grinding Wheel-to-Table Clearance, 60 Hz	47.5–547.5 mm
Guideway Design	Double-V Longitudinal and Crossfeed Ways
Control Type	GRIND-X / Automatic Grinding Control
Machine Net Weight	Approx. 3,900 kg
Standard Machine Footprint (W × D × H)	3,330 × 2,450 × 2,120 mm
Magnetic Separator	Installed; operating condition to be confirmed
Measured Grinding Accuracy	Not Yet Verified
Power Supply	Subject to Machine Nameplate Verification
Price	Available Upon Request

Technical note: Travel, load, speed, wheel, and footprint specifications are published ACC84GX standard values, not independent test measurements of this used unit. The installed wheel, electrical configuration, accessories, and actual operating condition must be confirmed before purchase. Machine footprint excludes the coolant tank.

Applications & Suitable Industries

Used Okamoto ACC84GX is suitable for precision flat surface grinding operations in general metalworking and tool manufacturing environments.

Mold and Die Manufacturing

Grinding mold plates and die components
Surface finishing of mold bases
Machining flat reference surfaces on tooling components

Toolrooms and Precision Engineering

Surface grinding precision steel components
Finishing fixture and jig plates
Grinding parallel and flat surfaces

General Machinery Manufacturing

Finishing machine mounting surfaces
Grinding guide plates and tooling parts
Surface preparation of compatible metal components

Automotive and Industrial Component Production

Grinding suitable flat automotive components
Finishing fixtures and production tooling
Secondary surface finishing operations

Maintenance and Repair Workshops

Resurfacing compatible machine components
Repair and reconditioning of tooling plates
Small-batch precision grinding operations

The machine is particularly relevant to workshops requiring an 800 × 400 mm magnetic chuck and automatic surface grinding capability. Suitability for a specific part should be confirmed against material, size, workholding requirements, and required grinding tolerance.

FAQ

What are the grinding capacity and travel dimensions of the ACC84GX?

The ACC84GX has a standard 800 × 400 mm electromagnetic chuck and an 850 × 400 mm table working area. Its published maximum longitudinal and cross travels are 950 mm and 440 mm, respectively. The standard table load capacity is 700 kg, including the magnetic chuck.

Does this Okamoto surface grinder support automatic grinding?

Yes. The ACC84GX series is designed for hydraulic table movement, automatic crossfeed, and automatic vertical downfeed. The available automatic grinding modes and their operation on this particular used machine should be confirmed during inspection.