Airtac BSED Clamping Double Acting Cylinder BSED40X250
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED40X250 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 BSED40X250
The AirTAC BSED40X250 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 force in both directions at 528 N each way at 0.5 MPa. The integrated collet lock provides a 900 N static holding force, securing the load safely if air pressure drops.
This extruded aluminum profile body has no external tie rods and uses a separate G1/8 release port to disengage the lock. The cylinder operates at 0.15-0.7 MPa with a 30 mm adjustable air cushion at both ends. This specific SKU lacks a magnet, meaning position sensors like CMSE or DMSE cannot be used without a model change.
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 BSED40X250 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 BSED40X250 Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED40X250 |
|---|---|
| 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 BSED40X250
| 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 BSED40X250 Is Used
Pneumatic Vertical Lift
Raises and lowers 50 kg work platforms with 528 N both-way force, engaging the 900 N fail-safe collet to prevent uncontrolled drops during an E-stop.
Dual-End Tooling Station
Mounts a processing tool on the front rod and a mechanical flag on the rear rod, utilizing equal 739 N drive force at 0.7 MPa for precise machining strokes.
Pallet Transfer Stopper
Halts moving pallets on a conveyor using symmetric push/pull power, locking the 900 N collet instantly to hold the pallet securely during workpiece loading.
Is the Airtac BSED Clamping Double Acting Cylinder BSED40X250 the Right Cylinder?
Select this 40 mm bore when an application requires 528 N of symmetric drive force at 0.5 MPa alongside a 900 N fail-safe hold. If your load requires less force, step down to the 32 mm bore offering 345 N drive and 600 N holding force. For heavier loads, step up to the 50 mm bore providing 825 N drive and 1400 N holding force. Always verify your load to hold is 900 N or less.
Engage the lock only after the rod completely stops moving, and release it only when both piston sides are pressure-balanced, allowing at least 0.5 seconds for the transition. The lock is a static holding device, not a dynamic brake. Because the 250 mm stroke increases side-load leverage, use external guide rails to prevent rod binding. Replacement parts must match the 40 mm bore, 250 mm stroke, PT1/4 port, and lack of magnet.
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 BSED40X250 FAQ
The integrated collet lock is spring-applied and engages automatically, providing a 900 N static holding force to keep the rod at its position. It requires air pressure via the G1/8 release port to unlock.
The double-rod design provides equal drive force in both directions: 528 N at 0.5 MPa and 739 N at 0.7 MPa, with a maximum drive force of 75 kgf. The static fail-safe holding force of the lock is 900 N.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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