Airtac BSED Clamping Double Acting Cylinder BSED40X125S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED40X125S 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, 125mm stroke, PT1/4 ports, G1/8 lock-release.
- BoreØ40 mm
- Stroke125 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 BSED40X125S
The AirTAC BSED40X125S is a double-acting, double-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released collet rod lock. A rod exits both ends, delivering equal force in both directions—528 N each way at 0.5 MPa and 739 N at 0.7 MPa. The integrated lock provides a 900 N bidirectional static holding force with no live air required.
This extruded aluminum VDMA 24562 profile body has no external tie rods and includes a 16 mm rod with an M12x1.25 thread. The -S magnet option supports CMSE reed and DMSE electronic sensors. A separate G1/8 port controls the lock release, and the cylinder port is PT1/4. The lock engages only after the rod stops and requires at least 0.5 s to release once both 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 BSED40X125S 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 BSED40X125S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED40X125S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 BSED40X125S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 40 | Bore size in mm. |
| ×125 | 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 BSED40X125S Is Used
Vertical Lift Interlock
Holds a 900 N vertical load in place during an E-stop or air loss, while the 739 N both-way drive force raises and lowers the tooling.
Pallet Stopper Gate
Uses the dual rods to push and retract a stop blade with equal 528 N force at 0.5 MPa, locking the blade securely against 900 N of pallet impact force.
Mid-Stroke Machining Clamp
Provides a rigid 16 mm rod clamp for machining operations, engaging the 900 N collet lock only after the 125 mm stroke motion fully stops.
Is the Airtac BSED Clamping Double Acting Cylinder BSED40X125S the Right Cylinder?
Select this 40 mm bore when an application needs symmetric both-way force and a 900 N fail-safe hold. If your load requires less holding or drive force, step down to the 32 mm bore (345 N drive force at 0.5 MPa, 600 N holding force). If you need more capacity, step up to the 50 mm bore (825 N drive force at 0.5 MPa, 1400 N holding force). Always verify your load does not exceed the 900 N static holding limit.
For safe operation, never engage the lock dynamically; engage it only after the rod stops moving. Release the lock only when both piston sides are pressure-balanced, allowing at least 0.5 s for the transition. When replacing a unit, match the 40 mm bore, 125 mm stroke, PT1/4 port, and -S magnet. For this 125 mm stroke, ensure external guides are used to prevent side-load wear on the seals.
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 BSED40X125S FAQ
The BSED40X125S delivers a drive force of 528 N at 0.5 MPa and 739 N at 0.7 MPa (max 75 kgf), which is equal in both directions due to the double-rod design. The integrated fail-safe rod lock provides a bidirectional static holding force of 900 N with no live air required.
The lock is a spring-applied, air-released collet, not a dynamic brake. You must engage the lock only after the rod completely stops moving. To release it, ensure both piston sides are pressure-balanced, apply air to the G1/8 release port, and allow at least 0.5 seconds for the collet to disengage before moving the rod.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC BSED Cylinders
Request a Quote for Airtac BSED Clamping Double Acting Cylinder BSED40X125S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.