Airtac BSED Clamping Double Acting Cylinder BSED125X80
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X80 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, 80mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke80 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED125X80
The AirTAC BSED125X80 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 extruded aluminum barrel provides ISO 15552 dimensional interchangeability without external tie rods.
This unit provides a bidirectional fail-safe static holding force of 8600 N with no live air required. The lock engages via a collet mechanism when air is lost or an E-stop is tripped. It features a separate G1/8 release port, a 40 mm adjustable air cushion at both ends, and a PT1/2 cylinder port. This specific SKU lacks a magnet, meaning it is not compatible with 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 BSED125X80 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 BSED125X80 Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X80 |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 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 BSED125X80
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×80 | 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 BSED125X80 Is Used
Heavy Press Clamping
Clamps large metal castings with 8028 N of equal both-way drive force and secures the 819 kgf load safely with an 8600 N fail-safe collet lock during air pressure drops.
Vertical Lift Stations
Holds elevated heavy tooling platforms securely in place with zero live air using the 8600 N static lock, while the double-rod resists rotational torque.
Overhead Crane Stops
Positions heavy overhead crane components bidirectionally and locks the 32 mm rod instantly during an E-stop, preventing catastrophic uncommanded drops.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X80 the Right Cylinder?
Select this 125 mm bore model when your application demands both symmetric heavy thrust and a high fail-safe hold. Verify your static load does not exceed the 8600 N holding capacity. If you need less force, the adjacent 100 mm bore provides 3681 N at 0.5 MPa and 5500 N of holding force. If you require more, step up by consulting AirTAC for larger custom solutions. Always engage the lock only after the rod completely stops, and release it only when both piston sides are pressure-balanced, allowing at least 0.5 seconds.
For replacement, match the 125 mm bore, 80 mm stroke, PT1/2 port thread, and the Basic, LB, FA, or TC mounting style. Because this SKU has no -S magnet suffix, it cannot support position sensing. Although the 80 mm stroke is short, always verify your guidance to handle potential side loads effectively.
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 BSED125X80 FAQ
The spring-applied collet immediately clamps the rod, providing a bidirectional fail-safe static holding force of 8600 N with no live air. It is a holding lock, not a dynamic brake, so it must only engage after the rod stops. For overhead or man-rated loads, always use separate safety-rated controls.
The double-rod design provides equal force both ways: 5734 N at 0.5 MPa, 8028 N at 0.7 MPa, and a maximum drive of 819 kgf. To release the 8600 N lock, apply pressure to the separate G1/8 release port only after both piston sides are pressure-balanced, allowing at least 0.5 seconds for the collet to disengage.
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