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Sugawara Labs LWM Series Race Wavimeter – Bearing Race Waviness & Roundness Measurement System

Sugawara Laboratories Inc.
Type: Bearing Inspection & Vibration Testing
Supplier / Manufacturer: Sugawara Laboratories Inc.
Model: LWM-102 / LWM-519 / LWM-706

Precision waviness and roundness measurement system for inner and outer bearing race surfaces. Three LWM drive units cover bearing rings from miniature sizes through outer diameters up to Ø220 mm.

Industries & Applications:
R&DQuality ControlBearing ComponentsBearing TestingRoundness MeasurementWaviness Measurement
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Nanometer-Level Waviness and Roundness Measurement for Bearing Races

Sugawara Race Wavimeters provide high-precision measurement of waviness and roundness on the inner and outer race surfaces of ball-bearing rings.

A precision direct-drive spindle rotates the bearing ring while a high-sensitivity contact velocity sensor detects minute vibration generated by surface geometry. The SWA-105 Synchro Wave Analyzer synchronizes the signal with rotation and provides real-time numerical, spectral, polar-coordinate, and waveform analysis.
10 nmPractical measurement accuracy for race-surface inspection
Ø3.5–220 mmRing-size coverage across three LWM drive-unit configurations
≤10 secTypical race-setting time for efficient production inspection
7 BandsU, R, L, M, H, E, and A frequency-band analysis
Three drive-unit sizes cover miniature through large bearing rings. The LWM-102 supports compact rings, while the LWM-519 and LWM-706 extend measurement to outer diameters of 160 mm and 220 mm respectively.

10 nm Practical Accuracy

High-precision measurement enables detailed evaluation of minute waviness and roundness variations on bearing race surfaces.

Ø3.5–220 mm Coverage

Three LWM drive units cover miniature, medium, and large bearing-ring sizes.

Inner and Outer Race Inspection

Measures circumferential surface quality on the raceways of bearing inner and outer rings.

Fast Workpiece Setup

Dedicated Piloter hardware supports stable measurement with race-setting time of approximately 10 seconds or less.

Low-Vibration Spindle System

Fluid-dynamic spindle bearings and direct drive minimize mechanical vibration during measurement.

Seven Measurement Bands

Surface characteristics can be evaluated through U, R, L, M, H, E, and A frequency bands.

Real-Time Shape Analysis

SWA-105 provides numerical, spectral, polar-coordinate, and waveform displays in real time.

Pass/Fail Evaluation

Threshold-based judgment functions support repeatable bearing-part production and quality-control inspection.
Inner Race Waviness InspectionPrecision evaluation of circumferential surface geometry on bearing inner-ring raceways.
Outer Race Waviness InspectionMeasurement of surface waviness that can contribute to vibration and noise in completed bearings.
Bearing Race RoundnessNanometer-level roundness evaluation for precision bearing component manufacturing.
Bearing Manufacturing Process ControlInspection of machined and finished bearing races before final bearing assembly.
Quality ControlRepeatable comparison of race surfaces against established waviness and roundness criteria.

LWM Series Model Comparison

Specification LWM-102 LWM-519 LWM-706
Ring Size Inner Ø3.5 mm – Outer Ø22 mm Inner Ø26 mm – Outer Ø160 mm Inner Ø26 mm – Outer Ø220 mm
Maximum Width 7 mm 30 mm 50 mm
Spindle Bearing Fluid dynamic bearing (oil) Fluid dynamic bearing (oil) Fluid dynamic bearing (oil)
Drive System Direct drive Direct drive Direct drive
Dimensions 300 × 420 × 474 mm 700 × 1,330 × 830 mm 700 × 1,425 × 830 mm
Weight 80 kg 330 kg 360 kg

SWA-105 Synchro Wave Analyzer

The SWA-105 is the common analyzer for Sugawara Ball and Race Wavimeters. It provides synchronized waviness and roundness analysis with numerical, spectral, polar-coordinate, and waveform displays. Pass/fail thresholds can be configured for seven measurement bands, while measurement conditions, waveform recordings, results, and screen captures can be stored for quality-control workflows.