Airtac BSED Clamping Double Acting Cylinder BSED125X225
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X225 combines a double-rod ISO 15552 cylinder — a Ø32mm rod out BOTH ends for equal force both directions — with an integrated spring-applied, air-released ROD LOCK that holds up to 8600 N in either direction if air is lost. Ø125mm bore, 225mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke225 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED125X225
The AirTAC BSED125X225 is a double-acting, double-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A rod exits both ends, delivering equal force in both directions—about 5734 N each way at 0.5 MPa. The internal collet lock provides a robust 8600 N static holding force, keeping the load fixed if air pressure drops.
This 125 mm bore unit uses a PT1/2 cylinder port alongside a dedicated G1/8 lock-release port. Because this specific SKU lacks the -S magnet option, it does not support CMSE or DMSE position sensors. The lock is a static holding device, not a dynamic brake; engage it only after the rod stops and release it only when piston sides are pressure-balanced.
Double Rod + 8600 N Rod Lock (Ø125mm)
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 BSED125X225 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 BSED125X225 Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X225 |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 mm |
| Static holding force | 8600 N |
| Cylinder port | PT1/2 |
| 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 – 500 mm/s |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC BSED datasheet. Rod thread M27×2 both ends. Mounting (BSED): Basic, LB, FA, TC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø125mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 5734 N |
| 0.7 MPa (max) | 8027 N |
| Max drive (@0.7 MPa) | 819 kgf |
A rod exits both ends, so force is equal on extend and retract. Drive force is separate from the 8600 N static lock holding force. Size with a safety margin.
Model Code: Airtac BSED Clamping Double Acting Cylinder BSED125X225
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×225 | 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 BSED125X225 Is Used
Heavy Press Ejector
Ejects and retracts heavy stamping blanks with 8028 N of equal both-way force, while the 8600 N lock holds the heavy tooling rigidly in place during the press cycle.
Vertical Lift Platform
Raises a 125 mm bore lift stage in both directions using the dual rods, engaging the fail-safe collet to hold the 8600 N load securely if air supply is interrupted.
Multi-Position Stopper
Uses the rear rod for cam actuation while the front rod stops large pallets, locking instantly with 8600 N of static hold when the system hits E-stop.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X225 the Right Cylinder?
Select this 125 mm bore actuator when your application demands symmetric both-way force and fail-safe holding up to 8600 N. To size correctly, verify your load to be held is within the 8600 N limit and your drive requirement matches the 5734 N at 0.5 MPa or 8028 N at 0.7 MPa. If you need less force, the neighboring 100 mm bore provides 3681 N at 0.5 MPa (5500 N holding force). As the largest standard bore, there is no larger step up—if 8600 N holding force is insufficient, you must redesign the mechanical leverage or split the load across multiple cylinders.
Always allow at least 0.5 seconds for the lock to engage or release after stopping or pressure-balancing. For replacement matching, confirm the 225 mm stroke, PT1/2 port, M27x2 rod thread, and your preferred mounting style (Basic, LB, FA, or TC). Although this 225 mm stroke is under 300 mm, always ensure adequate guide support to prevent side loads from damaging the internal collet mechanism.
Quick checklist
- ✓ Need both symmetric force AND fail-safe hold?
- ✓ Load to hold ≤ 8600 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 BSED125X225 FAQ
The integrated spring-applied collet immediately clamps the 32 mm rod, providing a bidirectional static holding force of 8600 N with no live air. It is a fail-safe holding device, not a dynamic brake, so it only engages after the rod has stopped moving.
The double-rod design provides equal drive force in both directions: 5734 N at 0.5 MPa and 8028 N at 0.7 MPa, with a maximum drive force of 819 kgf. This drive force is separate from the 8600 N static holding force of the rod lock.
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