Airtac BSED Clamping Double Acting Cylinder BSED40X250S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED40X250S combines a double-rod ISO 15552 cylinder — a Ø16mm rod out BOTH ends for equal force both directions — with an integrated spring-applied, air-released ROD LOCK that holds up to 900 N in either direction if air is lost. Ø40mm bore, 250mm stroke, PT1/4 ports, G1/8 lock-release.
- BoreØ40 mm
- Stroke250 mm
- Static holding force900 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/4
- Lock-release portG1/8
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac BSED Clamping Double Acting Cylinder BSED40X250S
The AirTAC BSED40X250S is a double-acting, double-rod ISO 15552 cylinder with an integrated spring-applied, air-released rod lock. Because a rod exits both ends, it delivers equal force and speed in both directions, generating 528 N each way at 0.5 MPa. The rear rod is ideal for mounting a flag or cam and naturally resists rotation.
A separate G1/8 release port controls the fail-safe collet, which provides a 900 N bidirectional static holding force with zero live air. The lock engages only after the rod stops and requires >=0.5 s to release once piston sides are pressure-balanced. It is a static holding device, not a dynamic brake.
Double Rod + 900 N Rod Lock (Ø40mm)
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 BSED40X250S 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 BSED40X250S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED40X250S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Static holding force | 900 N |
| Cylinder port | PT1/4 |
| 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 – 800 mm/s |
| Max stroke | Up to 800 mm |
Specifications follow the official AirTAC BSED datasheet. Rod thread M12×1.25 both ends. Mounting (BSED): Basic, LB, FA, TC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø40mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa (max) | 739 N |
| Max drive (@0.7 MPa) | 75 kgf |
A rod exits both ends, so force is equal on extend and retract. Drive force is separate from the 900 N static lock holding force. Size with a safety margin.
Model Code: Airtac BSED Clamping Double Acting Cylinder BSED40X250S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 40 | Bore size in mm. |
| ×250 | 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 BSED40X250S Is Used
Pneumatic Vertical Lift
Lifts 75 kgf loads using 739 N of both-way force. The 900 N spring-lock engages instantly if air pressure drops, preventing uncommanded falls.
Multi-Position Machining Stop
Uses the rear rod for an anti-rotation cam. The collet locks the 250 mm stroke rigidly during machining, holding without consuming live air.
Diversion Gate Control
Drives a conveyor sorting gate with equal speed both ways. The fail-safe lock holds the gate open or closed securely during E-stops.
Is the Airtac BSED Clamping Double Acting Cylinder BSED40X250S the Right Cylinder?
Choose this 40 mm bore when an application requires 528 N of both-way drive force at 0.5 MPa alongside a 900 N fail-safe hold. If your load requires less force, the 32 mm bore offers 345 N drive and 600 N holding; if you need more, step up to the 50 mm bore for 825 N drive and 1400 N holding. Always verify the load to hold is <=900 N and ensure the rod is fully stopped before engaging the lock. For safety-rated or man-rated overhead loads, use certified external safety controls.
This configuration includes a -S magnet for CMSE reed or DMSE electronic sensors, a 250 mm stroke, and a PT1/4 cylinder port. Because the stroke is 250 mm, use a guide rail to prevent side-load wear on the seals and barrel.
Quick checklist
- ✓ Need both symmetric force AND fail-safe hold?
- ✓ Load to hold ≤ 900 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 BSED40X250S FAQ
The drive force is equal both ways: 528 N at 0.5 MPa and 739 N at 0.7 MPa (max 75 kgf). The integrated rod lock provides a separate 900 N bidirectional static holding force with no live air.
The lock is spring-applied and air-released via the G1/8 port. Release it only when both piston sides are pressure-balanced, allowing at least 0.5 seconds before moving. It is a static lock, so engage it only after the rod stops.
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