Airtac BSED Clamping Double Acting Cylinder BSED40X350S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED40X350S 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, 350mm stroke, PT1/4 ports, G1/8 lock-release.
- BoreØ40 mm
- Stroke350 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 BSED40X350S
The AirTAC BSED40X350S 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. The rear rod is ideal for mounting flags or anti-rotation tooling.
This fail-safe collet lock provides a 900 N static holding force with no live air required. It engages only after the rod stops and releases via a separate G1/8 port when piston sides are pressure-balanced. The -S magnet supports CMSE reed and DMSE electronic sensors for precise position feedback.
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 BSED40X350S 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 BSED40X350S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED40X350S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 BSED40X350S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 40 | Bore size in mm. |
| ×350 | 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 BSED40X350S Is Used
Vertical Lift Stations
Holds a 900 N vertical load safely in place during air loss, while the 528 N both-way drive smoothly raises and lowers the 350 mm stroke platform.
Dual-Side Transfer
Uses the double-rod design to push and pull a workpiece with equal 528 N force, engaging the fail-safe lock to secure the part mid-transfer.
Machining Fixtures
Clamps a part using the rear rod for tooling while the 900 N collet lock resists machining vibration, keeping the 350 mm extension rigidly fixed.
Is the Airtac BSED Clamping Double Acting Cylinder BSED40X350S the Right Cylinder?
Select this 40 mm bore when an application requires both symmetric drive and 900 N static holding. If your load needs less force, the 32 mm bore offers 345 N drive at 0.5 MPa and 600 N holding. For heavier loads, the 50 mm bore provides 825 N drive and 1400 N holding. Always confirm your load is under 900 N before relying on the lock.
With a 350 mm stroke, use a guide to prevent side-loading and protect the seal package. To release the lock safely, ensure both cylinder sides are pressure-balanced and allow at least 0.5 seconds before moving. Replacement matches require the 40 mm bore, 350 mm stroke, PT1/4 port, and -S 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 BSED40X350S FAQ
The drive force is equal both ways at 528 N @0.5 MPa and 739 N @0.7 MPa, with a max drive of 75 kgf. The static fail-safe holding force of the rod lock is 900 N.
The spring-applied collet clamps the rod immediately, providing up to 900 N of static holding force without live air. It is not a dynamic brake; engage it only after the rod stops, and release it via the G1/8 port after balancing piston pressure for at least 0.5 seconds.
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