Airtac BSED Clamping Double Acting Cylinder BSED125X500
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X500 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, 500mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke500 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED125X500
The AirTAC BSED125X500 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 drive force of 5734 N each way at 0.5 MPa and 8028 N at 0.7 MPa. The robust collet lock provides a massive 8600 N static holding force with zero live air required.
This 125 mm bore unit uses a PT1/2 cylinder port and a separate G1/8 release port. Unlike single-rod variants, the twin-rod design prevents rod rotation and permits rear-end tooling or cam mounting. The lock engages only after motion stops and releases safely when piston sides are pressure-balanced, requiring a minimum 0.5 second delay.
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 BSED125X500 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 BSED125X500 Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X500 |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 BSED125X500
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×500 | 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 BSED125X500 Is Used
Heavy Vertical Lifts
Holds elevated platens weighing up to 8600 N securely during air loss, while providing 8028 N of equal lifting and lowering force.
Press Tooling
The rear rod supports secondary cams or tooling, with the collet lock preventing drift during heavy press operations.
Pallet Stops
Delivers 5734 N of bidirectional stopping force at 0.5 MPa, locking instantly when the conveyor E-stop trips.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X500 the Right Cylinder?
Select this 125 mm bore model when your load demands up to 819 kgf drive force symmetrically and a static hold up to 8600 N. If your load requires less hold, step down to the 100 mm bore (3681 N drive @0.5 MPa, 5500 N hold). As the largest standard bore, there is no step up; for heavier requirements, use dual cylinders. This SKU lacks a magnet, so position sensing is not available. For the 500 mm stroke, ensure external guides support side loads to prevent binding.
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 BSED125X500 FAQ
The BSED125X500 delivers an equal drive force of 5734 N at 0.5 MPa and 8028 N at 0.7 MPa (819 kgf max drive) in both directions. The integrated spring-applied rod lock provides a bidirectional static holding force of 8600 N without requiring live air.
The lock is a static hold, not a dynamic brake. Engage it only after the rod completely stops. To release, ensure both piston sides are pressure-balanced, apply air to the G1/8 release port, and allow at least 0.5 seconds before moving.
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