Dual-spindle rotating bending fatigue testing machine

Model : YRB300L

High Efficiency

GIGA QUAD® is convenient to get a number of fatigue test data very quickly, because four specimens can be tested simultaneously.
In order to obtain one S-N curve, four specimens can be tested at different stress levels by giving different weights for the respective specimens. Thus, S-N property of a definite material can be obtained within the reasonable short period.
From this point of view, the present machine of GIGA QUAD® has a significant performance of the high efficiency.

eX) Time needed for Giga-Cycle fatigue test data collection for Metal M.

Chart Comparison of Single and Dual-Spindle Testing Period

Easy operation

In this testing machine, collet nuts and collet chucks are used to fix and remove the specimens.
When the user wants to fix a specimen, the specimen is inserted into the collet chuck as indicated in this figure, and he tightens the collet nut by using a spanner.
And when he wants to remove the specimen, he loosens the collet nut by the spanner, and pull out it by fingers.

About the collet chucks, different inner diameters such as 6mm, 8mm and 10mm are prepared in advance.
Thus, the user can choose the most convenient size of the collet chuck depending on their own requirements.

Small eccentricity

The advantage is to use high performance collet chuck and nut. Thus, small eccentricity of the specimen after chucking was realized.
Such a small eccentricity is fundamentally important to perform the fatigue tests in rotating bending.
If the eccentricity becomes large, problems of vibration and noise take place in the fatigue tests and, therefore, some extent of error is included in the applied stress.

According to preliminary experiments, no effect of the eccentricity was found for fatigue test data to obtain the S-N property, if the eccentricity is kept within ±30μm.
This is the reason why eccentricity is focused as an important subject as a ROTATING BENDING FATIGUE TESTING MACHINE.
From this point of view, the eccentricity was kept within ±30μm.

One handed type

Plating, heat treatment, thermal spray, shot peening, laser, coating….
GIGA QUAD® is suitable for any kind of research and studies for metal fatigue characteristics with surface modification.

Because the effective volume of the specimen in the cantilever bending(One-handed type) is much smaller than that in the uniform bending(both-handed type).

This means that it is small percentage that the specimen is broken by material inner defect in the case of one-handed type.

High weight type

YRB300L is a higher weight model adapted for metal fatigue strength characteristics with high intensity and with heat treatment. It is designed with safety for higher weight.
YRB300L can be loaded to 85kg per one specimen.

Specification (for Japan)

YRB300L : the type of higher weight and underneath motor

Spindle spindle number 2
spindle speed rpm:500~4000
motor kW:0.4kW-4P
Capacitance V:200
Bearing spindle Angular contact ball bearing
specimen Deep groove ball bearing
Collet chuck chuck size mm:φ5~20
Maximum load kg:85X4
Maximum bending moment (in case of our specimen)
Belt type V belt A
Size of device weight kg:about 450
size mm:890X805X1260
Adjust boad of standard type
Service life year:3
Guaranteed term year:1

※ It is possible to change the specification for the other country.
※ Product specifications and appearance may be changed for the improvement. We appriciate your understanding.


Name Quantity Outline
Adapter 4 weight holding part from φ5~20mm
Weight 1 variety pack ※0.1kg~
Weight Holder 4
Corrosive environmental unit 1 in case of desire for doing test under an adverse corrosive condition

GIGA QUAD® Line up

It is possible to transfer the data to a PC via the in-house-developed wireless-measurement system which includes measuring instrument and transmitter built inside the tool holder.

Dual-spindle rotating bending fatigue testing machine for low load type


YRB200 was to be produced at high levels with high precision, high efficiency and less space.
It is suitable for the testing of giga-cycle fatigue characteristics which are supposed to take long time. It also has a variety of functions.

Dual-spindle rotating bending fatigue testing machine for high load type


YRB300L is a higher weight model adapted for metal fatigue strength characteristics reserch with high intensity and with heat treatment.
It is designed with safety for higher weight.

Corrosion environmental testing unit

Corrosion environmental testing unit YRB200-010

YRB200-010 can easily make corrosive environment and adapt to the test following actual environment. It is possible to perform rotating bending fatigue test under the corrosive environment.
The perfect antiscattering design of corrosive solution is being applied for a patent.

High temperature environmental testing unit (Halogen Lamp) for GIGA QUAD®

High temperature environmental testing unit(Halogen Lamp)

It is necessary to clarify the reliability property of structural materials at high environmental temperature.A spot light-condensed heating method is adopted in the developed high temperature unit. The light emitted from the halogen lamp is reflected and condensed to the small spot in the center of specimen.