Airtac BSED Clamping Double Acting Cylinder BSED125X225S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X225S 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 BSED125X225S
The AirTAC BSED125X225S is a double-acting double-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A rod exits both ends, yielding equal force in both directions—about 5734 N each way at 0.5 MPa. The fail-safe collet mechanism provides an 8600 N static holding force, clamping the rod securely whenever air pressure is removed.
This extruded aluminum body lacks external tie rods and operates at 0.15-0.7 MPa. Equipped with a magnet (-S), it supports CMSE reed and DMSE electronic sensors. It features a PT1/2 cylinder port, a separate G1/8 lock-release port, and 40 mm adjustable air cushions at both ends. Engage the lock only after the rod stops, and release it 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 BSED125X225S 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 BSED125X225S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X225S |
|---|---|
| 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 BSED125X225S
| 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 BSED125X225S Is Used
Heavy Vertical Lifts
Holds elevated platens weighing up to 8600 N securely in place during air loss, utilizing the 8028 N equal both-way drive to raise and lower heavy tooling.
Large Press Tooling
Provides symmetric clamping force from both rods for heavy press dies, engaging the fail-safe collet to lock the 32 mm rod instantly when an E-stop is triggered.
Pallet Stopping
Acts as a heavy-duty stop gate on high-mass conveyors, using the rear rod for cam tracking while the spring-applied lock resists bidirectional pallet impacts.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X225S the Right Cylinder?
Select this 125 mm bore when you need massive symmetric thrust and fail-safe holding. The drive force is 5734 N at 0.5 MPa and 8028 N at 0.7 MPa (819 kgf max), while the static lock holds up to 8600 N. If your load requires less force, the next size down is the 100 mm bore (3681 N at 0.5 MPa, 5500 N holding force); as this is the largest standard bore, there is no larger option. Ensure your load does not exceed 8600 N, and verify your safety controls for overhead loads.
When replacing a unit, match the 225 mm stroke, PT1/2 port, and mounting choice (Basic, LB, FA, or TC). Because this is a double-rod cylinder, the rear rod can mount a flag or cam for anti-rotation. Always allow at least 0.5 seconds after stopping before engaging the lock, and balance pressure before releasing.
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 BSED125X225S FAQ
If air is lost, the spring-applied collet immediately clamps the rod, providing a bidirectional static holding force of 8600 N. It is a fail-safe lock, not a dynamic brake, so it only engages after the rod stops. The lock releases when pressure is restored to the G1/8 port and both piston sides are balanced.
The drive force is equal both ways: 5734 N at 0.5 MPa and 8028 N at 0.7 MPa, with a max drive of 819 kgf. The static holding force of the lock is 8600 N. Operating pressure is capped at 0.7 MPa, and speed is 30-500 mm/s.
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