Used ACCRETECH RONDCOM 72A Roundness Measuring Machine

ACCRETECH RONDCOM 72A CNC Roundness and Cylindricity Measuring Machine

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Product Highlight

Used ACCRETECH Tokyo Seimitsu RONDCOM 72A is a Japanese CNC roundness and cylindricity measuring machine designed for precision inspection of large and heavy components. Featuring a detector-rotating system, 450 mm maximum measuring diameter, 1000 mm vertical travel, and 200 kg load capacity, it offers a cost-effective solution for industrial quality control and precision measurement applications.

Product Description

Used ACCRETECH Tokyo Seimitsu RONDCOM 72A is a Japanese CNC roundness and cylindricity measuring machine featuring a detector-rotating design for large, heavy precision components. With a maximum measuring diameter of 450 mm, 1000 mm vertical travel, and 200 kg workpiece capacity, it offers a cost-effective option for automotive, machinery, and industrial quality inspection applications.

Technical Specifications

General Information

Parameter	Specification
Brand	ACCRETECH / Tokyo Seimitsu
Model	RONDCOM 72A
Manufacturer	Tokyo Seimitsu Co., Ltd.
Brand Origin	Japan
Machine Condition	Used / Pre-Owned
Machine Type	CNC Roundness and Cylindrical Form Measuring Machine
Measuring System	Detector-Rotating Type
CNC Control	7-Axis Automatic Control (original model specification)

Measuring Capacity

Parameter	Specification
Maximum Measuring Diameter	Ø450 mm
Minimum Measurable Internal Diameter	Stylus diameter + 2 mm or greater
X-Axis Travel	600 mm
Y-Axis Travel	50 mm
Z-Axis Vertical Travel	1000 mm
Maximum Loadable Workpiece Diameter	Ø900 mm
Maximum Workpiece Weight	200 kg
Table Dimensions	600 × 550 mm

Measurement Accuracy

Parameter	Specification
Rated Rotation Accuracy	0.06 µm (JIS B7451)
Straightness Accuracy	2 µm / 200 mm
Straightness Accuracy (Extended Travel)	5 µm / 600 mm
Z-Axis Parallelism Accuracy	2 µm / 100 mm

Drive and Measurement Speeds

Parameter	Specification
Rotational Measuring Speed	2 rpm
Automatic Centering Speed	10 rpm
Vertical Measuring Speeds	0.6, 1.5, 6 mm/s
Maximum Vertical Travel Speed	30 mm/s

Detector and Measurement Functions

Parameter	Specification
Detector Measuring Force	70 mN
Standard Stylus	Ø1.6 mm Carbide Ball
CNC Measurement	Supported
Automatic Centering	Supported
Automatic Tilting	Supported
Roundness Evaluation Methods	MZC, LSC, MIC, MCC, NC
Profile Analysis	Roundness, Cylindricity, Straightness, Coaxiality, Concentricity, Flatness, Runout, Squareness, Parallelism
Additional Functions	Notch Processing, Parameter Comparison, Real-Time Display, Centering Assistance
Digital Filters	2RC / Phase Compensation
Rotational Filter Cutoffs	15, 50, 150, 500, 15–150, 15–500 upr
Linear Filter Cutoffs	0.025, 0.08, 0.25, 0.8, 2.5, 8 mm

Electrical and Physical Specifications

Parameter	Specification
Original Catalog Power Supply	AC 100V, 50/60Hz
Power Supply in Seller Listing	AC 220V, 50/60Hz (requires confirmation)
Rated Power Consumption	3 kVA
Air Supply Pressure	0.5–0.7 MPa
Air Consumption	30 L/min
Original Display Specification	15-inch Color Monitor
Installation Dimensions (W × D × H)	2850 × 3300 × 3000 mm
Approximate Machine Weight	3100 kg

Technical Note: The above values represent the manufacturer's original model specifications unless otherwise stated. Actual machine accuracy, installed software, accessories, electrical configuration, and operating condition are subject to verification before purchase.

Applications & Industries

Used ACCRETECH RONDCOM 72A CNC roundness measuring machine is designed for industrial dimensional inspection and geometric form analysis of cylindrical and rotational components.

Automotive Manufacturing

Suitable for inspecting crankshafts, camshafts, transmission shafts, bearing housings, and other precision-engineered automotive components.

Bearing and Rotating Equipment Manufacturing

Used for roundness, cylindricity, and concentricity inspection of bearing rings, rotating shafts, cylindrical housings, and similar components.

Heavy Machinery and Machine Tool Manufacturing

The detector-rotating design makes the machine particularly useful for geometric inspection of large or heavy workpieces that cannot be easily rotated during measurement.

Precision Engineering and Metalworking

Supports quality inspection of precision-machined cylindrical components, sleeves, shafts, and mechanical assemblies requiring accurate form evaluation.

Industrial Quality Control and Metrology Laboratories

Suitable for dimensional verification, production quality control, and form measurement of manufactured components within the machine's rated capacity and available measurement configuration.

FAQ

What is the ACCRETECH RONDCOM 72A used for?

The ACCRETECH RONDCOM 72A is a CNC roundness and cylindrical form measuring machine used to inspect roundness, cylindricity, straightness, coaxiality, and other geometric characteristics of precision components. It is suitable for industrial quality control and dimensional inspection.

Can the used RONDCOM 72A measure large and heavy workpieces?

Yes. The RONDCOM 72A has a maximum loadable workpiece diameter of 900 mm and a rated load capacity of 200 kg. Its detector-rotating design allows workpieces to remain stationary during rotational measurement. The maximum measuring diameter is 450 mm.

What is the roundness measurement accuracy of the RONDCOM 72A?

The original manufacturer's specifications list a rotation accuracy of 0.06 µm according to JIS B7451. This is a rated specification rather than a guarantee of the current used machine's accuracy. A calibration or performance test is recommended before purchase.

Does the ACCRETECH RONDCOM 72A support automatic measurement?

Yes. The original model supports CNC measurement, automatic centering, automatic tilting, and geometric profile analysis. Buyers should confirm the working condition of the CNC system, measuring detector, and installed software before ordering.