Airtac BSED Clamping Double Acting Cylinder BSED125X150
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X150 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, 150mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke150 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED125X150
The AirTAC BSED125X150 is a double-acting, double-rod ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. A rod exits both ends, providing equal drive force of 5734 N each way at 0.5 MPa and a maximum of 8028 N at 0.7 MPa. The rear rod can mount tooling or a flag cam while resisting rotation.
This unit delivers a bidirectional fail-safe static holding force of 8600 N with no live air required. If pressure drops or an E-stop trips, the collet clamps the rod and holds the load. The lock is engaged only after the rod stops and released when both piston sides are pressure-balanced, requiring at least 0.5 seconds. It features a separate G1/8 release port, a 40 mm cushion length both ends, and a PT1/2 cylinder port. This SKU has no magnet, so it does not support CMSE or DMSE position sensors.
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 BSED125X150 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 BSED125X150 Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X150 |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 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 BSED125X150
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×150 | 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 BSED125X150 Is Used
Heavy Machining Clamps
Secures heavy cast iron blocks during CNC milling. The double-rod delivers 8028 N of equal clamping pressure both ways, while the 8600 N fail-safe lock prevents the workpiece from shifting if shop air drops.
Vertical Pallet Stops
Halts heavy pallets on an overhead conveyor. The spring-applied collet engages when the rod stops, holding the 8600 N load securely without continuous air, while the double-rod resists rotational torque.
Press Feed Ejectors
Ejects formed parts from a press with equal force in both directions. The fail-safe lock freezes the rod instantly during an E-stop, protecting the die and operators from uncontrolled motion.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X150 the Right Cylinder?
Select this 125 mm bore model when your application requires symmetric both-way force and a massive 8600 N fail-safe hold. Verify your load to be held is 8600 N or less. If you need less force, the next bore down is 100 mm, offering 3681 N at 0.5 MPa and a 5500 N holding force. If you require more drive power, 125 mm is the largest standard bore available. Operating pressure is capped at 0.7 MPa, and the lock-release port is always G1/8.
Ensure you match the exact replacement attributes: 125 mm bore, 150 mm stroke, PT1/2 port thread, and no magnet. Because this is a static lock and not a dynamic brake, engage it only after the rod stops. For any stroke length 300 mm or longer, add external guide rails to manage side loads and prevent binding. Recommend safety-rated controls for any man-rated or overhead loads.
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 BSED125X150 FAQ
The integrated spring-applied collet clamps the rod and provides a bidirectional static holding force of 8600 N with no live air. The lock is a fail-safe holding device, not a dynamic brake, so it must be engaged only after the rod stops.
The double-rod design provides equal drive force both ways: 5734 N at 0.5 MPa and 8028 N at 0.7 MPa, with a maximum drive of 819 kgf. This drive force is separate from the 8600 N static holding force of the lock.
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