Manual type roundness measuring instrument
RA-220 MITUTOYO

FEATURES
*Exceptional analysis capabilities and easy
operation
* Equipped with X/Z axis fine adjustment
mechanism
* Scale is incorporated in the Z axis
* Equipped with inside/outside diameter
continuous measurement function
* Equipped with DAT function
* Employs a wide range detector
* Compact and highly accurate (equipped
with premium quality air-bearing) )

Technical Data
Turntable
Rotational accuracy
Radial: (0.04+6H/10000)μm
H: Probing height (mm)
Axial: (0.04+6X/10000)μm
X: Probing radius (mm)
Rotational speed: 6rpm
Table top diameter: 150mm
Centering range: ±3mm
Leveling range: ±1°
Maximum probing diameter: 280mm
(ø380mm: When the detector orientation is changed to
the vertical position, only samples up to 50mm from the
table top surface can be measured)
Maximum workpiece diameter: 470mm
Maximum table loading: 25kg
Vertical column (Z-axis)
Vertical travel: 280mm
Straightness (in narrow range): 0.2μm/20mm
Straightness (in entire range): 0.5μm/100mm
Parallelism with turntable axis: 0.5μm/100mm
Maximum probing height: 280mm from the turntable top
Maximum probing depth: 100mm (minimum ID: ø30mm)
Horizontal arm (X-axis)
Horizontal travel: 165mm (Including a protrusion of
25mm over the turntable axis)
Probe and stylus
Measuring range: ±1000μm (±30%)
Measuring force: 70 to 100mN (±30%)

Please refer to our website for more information.