Airtac BSED Clamping Double Acting Cylinder BSED50X125
The AirTAC BSED Clamping Double Acting Cylinder BSED50X125 combines a double-rod ISO 15552 cylinder — a Ø20mm rod out BOTH ends for equal force both directions — with an integrated spring-applied, air-released ROD LOCK that holds up to 1400 N in either direction if air is lost. Ø50mm bore, 125mm stroke, PT1/4 ports, G1/8 lock-release.
- BoreØ50 mm
- Stroke125 mm
- Static holding force1400 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/4
- Lock-release portG1/8
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac BSED Clamping Double Acting Cylinder BSED50X125
The AirTAC BSED50X125 is a double-acting, double-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. Because a rod exits both ends, it generates equal force in both directions—delivering 825 N each way at 0.5 MPa and 1154 N at 0.7 MPa. The rear rod is ideal for mounting cams or flags and naturally resists rotation.
The fail-safe collet lock provides a 1400 N static holding force without requiring live air. If pressure drops or an E-stop trips, the rod clamps instantly to hold position. This unit lacks a magnet (-S), so it does not support CMSE or DMSE position sensors. Unlocking requires a separate G1/8 port, and the operating pressure is capped at 0.7 MPa.
Double Rod + 1400 N Rod Lock (Ø50mm)
A rod exits both ends for symmetric force and back-rod tooling, and a spring clamps the collet so the Airtac BSED Clamping Double Acting Cylinder BSED50X125 holds its position in both directions on air loss or E-stop. Apply 0.15–0.7 MPa to the G1/8 release port to unlock. Engage only after the rod has stopped (not a dynamic brake), and release only when both piston sides are pressure-balanced; allow ≥0.5 s for full release.
Airtac BSED Clamping Double Acting Cylinder BSED50X125 Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED50X125 |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 125 mm |
| Static holding force | 1400 N |
| Cylinder port | PT1/4 |
| Lock-release port | G1/8 |
| Configuration | Double rod, double acting |
|---|---|
| Operating pressure | 0.15 – 0.7 MPa |
| Unlocking pressure | 0.15 – 0.7 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC BSED datasheet. Rod thread M16×1.5 both ends. Mounting (BSED): Basic, LB, FA, TC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø50mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 825 N |
| 0.7 MPa (max) | 1155 N |
| Max drive (@0.7 MPa) | 118 kgf |
A rod exits both ends, so force is equal on extend and retract. Drive force is separate from the 1400 N static lock holding force. Size with a safety margin.
Model Code: Airtac BSED Clamping Double Acting Cylinder BSED50X125
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 50 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Thread: PT (blank) / G. Mounting (BSED): Basic, LB, FA, TC. Related: SED (double rod, no lock), BSE (single-rod rod lock). Sensors CMSE/DMSE fit magnetic BSED.
Where the Airtac BSED Clamping Double Acting Cylinder BSED50X125 Is Used
Vertical Lift Stations
Lifts loads with 825 N of equal both-way force, while the 1400 N fail-safe collet locks the rod instantly to prevent drops during an air loss event.
Symmetric Transfer Arms
Uses the double-rod design to move parts evenly in both directions, utilizing the rear rod for anti-rotation stability and cam flags.
Mid-Stroke Machining Stops
Holds a workpiece firmly at 125 mm stroke with 1400 N of static clamping force, keeping the part secure without consuming live air.
Is the Airtac BSED Clamping Double Acting Cylinder BSED50X125 the Right Cylinder?
Select this 50 mm bore when your application requires symmetric thrust up to 1154 N alongside a 1400 N static hold. If you need less force, step down to the 40 mm bore (528 N at 0.5 MPa, 900 N hold). If your load exceeds these limits, step up to the 63 mm bore (1402 N at 0.5 MPa, 2200 N hold). Always verify your load stays under 1400 N.
Engage the lock only after the rod stops moving, and release it only when both piston sides are pressure-balanced, allowing at least 0.5 seconds. When replacing a unit, match the 125 mm stroke, PT1/4 cylinder port, M16x1.5 rod thread, and mounting choice (Basic, LB, FA, or TC). Since the stroke is 125 mm, ensure adequate guide support to prevent side-loading.
Quick checklist
- ✓ Need both symmetric force AND fail-safe hold?
- ✓ Load to hold ≤ 1400 N?
- ✓ Back-rod space for tooling/flag
- ✓ Lock engaged only when stopped
- ✓ G1/8 release-air line available
Installation & Safety Notes
- check Engage the lock only after the rod has stopped — not a dynamic brake.
- check Release only when both piston sides are pressure-balanced.
- check Allow ≥0.5 s for full release before commanding motion.
- check Feed the G1/8 release port with 0.15–0.7 MPa clean air.
- check Support both rod ends; avoid side load.
- check Use BSED mounting (Basic/LB/FA/TC).
Airtac BSED Clamping Double Acting Cylinder BSED50X125 FAQ
The integrated spring-applied collet engages automatically, providing a 1400 N static holding force to keep the rod at position. It is a fail-safe lock, not a dynamic brake, so it must engage only after the rod stops. To release, apply air to the G1/8 port after balancing piston pressure.
The drive force is equal both ways at 825 N @0.5 MPa and 1154 N @0.7 MPa, with a max drive of 118 kgf. The static holding force is 1400 N. Speed ranges from 30-800 mm/s, operating pressure is 0.15-0.7 MPa, and the lock-release port is G1/8.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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