Yamato Electric
Yamato Electric RBR/ RBS Series Rotary Base Connector

Manufacturer: Yamato Electric Co., Ltd.
Model: RBR/ RBS Series
Rotary Base Connector RBR/ RBS Series
An ultra-thin, high-performance rotating base, ideal for connecting control boxes, monitors, and other devices.
- Extremely Thin Exposed Height
- The exposed height of the rotating part is a minimal 10.7 mm and is extremely thin. (When mounted on the bottom side, with a casing plate thickness of 2.3 mm)
- Bidirectional Load Compatibility
- Can be used for bidirectional loads (both compression and tension).
- Eccentric Load Compatibility
- Can be used even under eccentric load conditions due to the slide plate structure.
- Tight Space Compatibility
- The RBS type, which has the center flange cut off, can also be installed in narrow spaces.
- Various Rotation Angles
- The rotation angles are set at 45∘ intervals and can be used at any desired angle.
If it is before installation, it is possible to change the rotation angle settings. (Refer to “Regarding the Rotation Angle”)


Usage Method
The center flange can be mounted on both the top and bottom sides of the casing surface.

Regarding the Rotation Angle
This product has screws for setting the rotation angle arranged on the bottom flange at 45∘ intervals. Although the angle stopper screw is set at the 180∘ position at the time of shipment, please use it at any desired position. (The actual rotation angle will be approximately 14∘ narrower for 50A and 12∘ narrower for 70A.)

Precautions for Installation and Use
- When using under an eccentric load, please consider the strength of the mounting surface, such as that of a control panel.
- Fix using four M6 screws.
- Applying a strong impact to the stopper pin (screw) may cause the pin to break, so please be careful.
Round Flange Type Rotary Base Connector RBR
An ultra-thin, high-performance rotating base, ideal for connecting control boxes, monitors, and other devices.


Unit: mm
| Nominal Size | Code | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| A | B | C | D | P1 | P2 | Maximum Vertical Load N | Eccentric Load (N·m) | Mass (g) | ||
| RBR-50A | 50 | 90 | 90 | 120 | 78 | 106 | 500 | 60 | 1150 | |
| 70A | 70 | 110 | 110 | 140 | 98 | 126 | 700 | 80 | 1480 | |
| Material | Main Part: Steel | |||||||||
| Remarks | ||||||||||
Square Flange Type Rotary Base Connector RBS
- An ultra-thin, high-performance rotating base, ideal for connecting control boxes, monitors, and other devices.
- Since the center flange is cut on four sides (squaring it), it can also be installed in narrow spaces.


Unit: mm
| Nominal Size | Code | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | B | C | D | P1 | P2 | □E | Max Vertical Load (N) | Eccentric Load (N·m) | Mass (g) | ||
| RBS-50A | 50 | 90 | 90 | 120 | 78 | 106 | 98 | 500 | 60 | 1060 | |
| 70A | 70 | 110 | 110 | 140 | 98 | 126 | 118 | 700 | 80 | 1370 | |
| Material | Main Part: Steel | ||||||||||
| Remarks | |||||||||||
Connector Mounting Dimension Diagram

Mounting bolts are not included.
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