Used MARUEI MG-300 Cylindrical Grinder

MARUEI MG-300 Manual Cylindrical Grinder

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Product Highlight

Used MARUEI MG-300 is a compact Japanese manual cylindrical grinder designed for precision OD grinding of small shafts, pins and cylindrical components. With a 300 mm distance between centers, simple conventional controls and a compact footprint, it is well suited to precision workshops, tool rooms, maintenance departments and small-batch production.

Product Description

Used MARUEI MG-300 manual cylindrical grinder made in Japan, designed for precision external grinding of small shafts, pins and cylindrical components. Its compact construction, simple manual operation and 300 mm distance between centers make it a practical choice for tool rooms, repair workshops and precision machining facilities looking for a cost-effective Japanese cylindrical grinding machine.

Technical Specifications

Specification	MARUEI MG-300
Machine Type	Manual / Conventional Cylindrical Grinder
Brand	MARUEI
Model	MG-300 / MIG-MG-300
Country of Origin	Japan
Swing Over Table	Ø170 mm
Distance Between Centers	300 mm
Maximum Grinding Diameter	Approx. Ø30 mm*
Grinding Wheel Size	Ø205 × 13 (25) × Ø50.8 mm
Grinding Wheel Peripheral Speed	33 m/s
Grinding Wheel Speed	Approx. 3,100 rpm
Workhead Spindle Speed	Up to 800 rpm
Workhead Swivel	±45°
Grinding Wheel Head Swivel	±30°
Grinding Wheel Head Travel	95 mm
Wheel Head Feed per Revolution	1 mm
Wheel Head Feed per Graduation	0.0025 mm
Center Taper	MT No.1
Tailstock Quill Travel	15 mm
Table Swivel	±6°
Grinding Wheel Motor	0.4 kW
Machine Dimensions	Approx. 1,500 × 970 mm
Approx. Net Weight	550 kg
Operation	Manual / Conventional

Applications & Suitable Uses

Used MARUEI MG-300 cylindrical grinder is suitable for precision OD grinding and finishing of small cylindrical components where dimensional accuracy and surface finish are important.

Typical applications include:

Precision shaft grinding
Pin and dowel grinding
Small spindle finishing
Tool and die component grinding
Bearing-related component finishing
Gear shaft finishing
Automotive precision parts
Aerospace precision components
Small-batch component production
Tool-room and maintenance grinding
Prototype machining
Repair and reconditioning workshops

Its relatively compact footprint makes the MG-300 particularly useful for workshops that need Japanese precision cylindrical grinding capability without installing a large CNC grinder.

FAQ

What size workpieces can the MARUEI MG-300 handle?

The MG-300 has a 300 mm distance between centers and a table swing of approximately Ø170 mm. The actual usable grinding diameter depends on the workholding method, grinding wheel setup and configuration of the individual machine.

Can the MARUEI MG-300 be used for precision shaft grinding?

Yes. The MG-300 is designed for cylindrical grinding and is suitable for grinding small shafts, pins, spindles and other rotational components that require accurate outside diameters and controlled surface finishes.

Is the MG-300 suitable for small-batch production?

Yes. Its manual operation and compact design make it especially suitable for small-batch manufacturing, prototype work, tool rooms, maintenance departments and precision component workshops.