Airtac BSED Clamping Double Acting Cylinder BSED40X400S
The AirTAC BSED Clamping Double Acting Cylinder BSED40X400S 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, 400mm stroke, PT1/4 ports, G1/8 lock-release.
- BoreØ40 mm
- Stroke400 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 BSED40X400S
The AirTAC BSED40X400S 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—about 528 N each way at 0.5 MPa—making it ideal for symmetrical tooling or mounting a rear cam. The integrated collet lock provides a bidirectional static holding force of 900 N without requiring live air.
This 40 mm bore, 400 mm stroke model includes a magnetic piston (-S) for use with CMSE reed or DMSE electronic sensors. Operating pressure is capped at 0.7 MPa, and the lock mechanism uses a separate G1/8 release port. It is a fail-safe holding device, not a dynamic brake; engage it only after the rod stops and allow at least 0.5 seconds for release once piston sides are pressure-balanced.
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 BSED40X400S 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 BSED40X400S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED40X400S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 BSED40X400S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 40 | Bore size in mm. |
| ×400 | 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 BSED40X400S Is Used
Vertical Lift Stops
Holds a 900 N vertical load safely in place during air loss or E-stop, while the 528 N both-way drive smoothly raises and lowers the platform.
Symmetric Transfer Unit
Uses the double-rod design for equal push and pull speed across a 400 mm stroke, mounting a rear flag for mid-travel position confirmation.
Machining Head Index
Locks a 75 kgf tooling head rigidly in place against vibration once positioned, releasing only after both cylinder sides are pressure-balanced.
Is the Airtac BSED Clamping Double Acting Cylinder BSED40X400S the Right Cylinder?
Select this model when your application requires both symmetric drive force and fail-safe holding. Verify your load does not exceed the 900 N static holding force. If you need less force, the 32 mm bore offers 345 N drive at 0.5 MPa and 600 N holding. If you need more, step up to the 50 mm bore, which provides 825 N drive at 0.5 MPa and 1400 N holding.
When ordering a replacement, match the 40 mm bore, 400 mm stroke, PT1/4 cylinder port, and the -S magnet option. Because this stroke is 400 mm, ensure adequate external guide support to prevent side loads from binding the rod. Mounting options include Basic, LB, FA, and TC.
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 BSED40X400S FAQ
The spring-applied collet immediately engages, providing a 900 N static holding force to keep the load in position without live air. It is a fail-safe lock, not a dynamic brake, so it must only be engaged after the rod stops moving.
The double-rod design provides equal drive force both ways: 528 N at 0.5 MPa and 739 N at 0.7 MPa, with a maximum drive of 75 kgf. This is separate from the 900 N static holding force of the rod lock.
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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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