The CRYSTA-Apex V series

RA-120 /120P – Roundness

The Mitutoyo Roundtest RA-120/120P is a compact, affordable, and user-friendly roundness measurement solution designed for measuring part geometry directly on the shop floor. It offers simplicity in operation while providing accurate measurements of roundness for effective quality control.
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Product Features 

Digital Adjustment Table (DAT) function for convenient display of centering and leveling adjustments on the turntable, simplifying workpiece placement.

Large color backlit LCD screen to easily view measurement results, graphs, and facilitate form assessment and notch processing.

Notch processing feature to exclude data from notches or scratches if desired.
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Model RA-120 includes a built-in high-grade thermal printer for instant measurement analysis results, graphs, and comments.

Model RA-120P is PC-based with a Windows graphical interface, providing excellent usability and advanced functions.

Technical Specifications

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Benefits

Technical Data

Dimensions

Benefits
The Roundtest RA-120/120P roundness measuring instrument is equipped with a wide range detector of ±1000μm and a precision turntable, delivering exceptional rotational accuracy that surpasses other compact roundness measuring instruments. 

The dedicated processor, controlled through a control panel on the main unit, handles all measurements and operations for streamlined functionality.
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Technical Data
Bearing Type:
Air

Rotating Speed:
6rpm

Table Diameter:
5.9" / 150mm

Table Centering Range (With DAT function):
± .12" / ± 3mm

Table Leveling Range:
±1°

Max Table Loading:
55lbs / 25kg

Table Max Probing Diameter:
11" / 280mm

Table Max Loading Diameter:
17.3" / 440mm

Column Traverse Method:
Manual

Coarse Manual feed:
1.18" / 30mm

Fine Manual feed:
.039" / 1mm

Column Traverse Range:
11" / 280mm

Column Max Probing Depth:
3.94" (min. ID: 1.18”) / 100mm (min. ID: 30mm)

Radial Traverse Method:
Manual

Radial Traverse Range:
6.5" / 165mm

Detector Measuring Force:
100 (± 30%) mN

Detector Stylus Tip:
Carbide ball diameter 0.06" / Carbide ball diameter 1.6mm

Detector Measuring Range:
± .04μin / ±1000μm

Detector Measuring Direction:
Dual direction

Stylus Angle Adjustment:
±45°

Data Sampling Points:
3600/rev

Analysis Measuring Range:
± .0004, ± .004, ± .04μin / ± 10, ± 100, ± 1000μm

Analysis Full Scale Range:
± .0002, ± .0004, ± .0008, ± .002, ± .004, ± .008, ± .02, ± .04μin / ± 10, ± 100, ± 1000, ± 20, ± 200, ± 5, ± 50, ± 500μm

Filter Type:
2CR50, 2CR75, 2CRPC50, 2CRPC75, Gaussian, Off

Reference Circle for Evaluation:
LSC, MCC, MIC, MZC

Data Analysis Items:
Circular runout (axial), Circular runout (radial), Coaxiality, Concentricity, Flatness, Parallelism, Roundness, Squareness (against axis), Squareness (against plane), Thickness deviation

Data output:
RS-232C, SPC, USB

Air pressure:
.39 Mpa

Base size:
17.7x14.2" / 450x360mm

Main Unit Dimensions:
17.7x14.2x25" / 450x360x636mm

Main Unit Mass:
70.5lbs / 32kg
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