Airtac BSED Clamping Double Acting Cylinder BSED40X350
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED40X350 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 BSED40X350
The AirTAC BSED40X350 is a double-acting, double-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. Because a rod exits both ends, it delivers equal force in both directions—generating 528 N each way at 0.5 MPa and 739 N at 0.7 MPa. The rear rod is ideal for mounting flags or cams while resisting rotational torque.
This fail-safe collet lock provides a 900 N static holding force with zero live air required. If pressure drops or an E-stop trips, the rod is clamped securely at position. It engages only after the rod stops and releases via a dedicated G1/8 port once piston sides are pressure-balanced. Note this SKU lacks a magnet, so it does not support CMSE or DMSE position sensors.
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 BSED40X350 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 BSED40X350 Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED40X350 |
|---|---|
| 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 BSED40X350
| 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 BSED40X350 Is Used
Vertical Lift Holding
Raises and lowers a 60 kg work carrier with 739 N of equal both-way force, engaging the 900 N fail-safe collet lock to prevent gravity drops during an air loss event.
Symmetric Transfer Unit
Shifts a dual-sided pick-and-place head along a 350 mm stroke, using the double-rod design for equal push/pull speed and mounting a rear cam for end-of-travel flags.
Mid-Stroke Machining Stop
Positions a clamping fixture and holds it against vibration using the 900 N static lock, keeping the load fixed without consuming continuous live air during the work cycle.
Is the Airtac BSED Clamping Double Acting Cylinder BSED40X350 the Right Cylinder?
Select this 40 mm bore when an application requires both-way symmetry and reliable mid-stroke holding. Verify your load stays under the 900 N static holding force. If you need less drive force, the 32 mm bore offers 345 N at 0.5 MPa and 600 N hold; if you need more, step up to the 50 mm bore providing 825 N at 0.5 MPa and 1400 N hold. Operating pressure is capped at 0.7 MPa.
At 350 mm stroke, the extended rod is susceptible to bending under side loads—always use external guide rails to support the load. To safely release the lock, ensure both cylinder sides are pressure-balanced and wait at least 0.5 seconds before stroking. When replacing, match the 40 mm bore, 350 mm stroke, PT1/4 cylinder port, and mounting choice (Basic, LB, FA, or 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 BSED40X350 FAQ
This cylinder provides equal drive force in both directions: 528 N at 0.5 MPa and 739 N at 0.7 MPa (max 75 kgf). The integrated fail-safe rod lock provides a separate 900 N static holding force with no live air required.
The spring-applied collet lock is not a dynamic brake. You must first restore pressure to balance both sides of the piston, then supply air to the dedicated G1/8 release port. Allow at least 0.5 seconds for the collet to disengage before commanding cylinder movement.
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