Airtac BSED Clamping Double Acting Cylinder BSED125X50
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X50 combines a double-rod ISO 15552 cylinder — a Ø32mm rod out BOTH ends for equal force both directions — with an integrated spring-applied, air-released ROD LOCK that holds up to 8600 N in either direction if air is lost. Ø125mm bore, 50mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke50 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- 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 BSED125X50
The AirTAC BSED125X50 is a double-acting, double-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A Ø32 mm rod exits both ends, yielding equal drive force of 5734 N each way at 0.5 MPa. The rear rod extension is ideal for mounting external flags or tooling while resisting rotational torque.
This fail-safe collet lock clamps bidirectionally with a static holding force of 8600 N, maintaining position without live air during an E-stop or pressure loss. Operating pressure is capped at 0.7 MPa, and a dedicated G1/8 release port isolates the unlock circuit from the PT1/2 cylinder ports. This SKU ships without a magnet, so it does not support reed or electronic position sensors.
Double Rod + 8600 N Rod Lock (Ø125mm)
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 BSED125X50 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 BSED125X50 Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X50 |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 50 mm |
| Static holding force | 8600 N |
| Cylinder port | PT1/2 |
| 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 – 500 mm/s |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC BSED datasheet. Rod thread M27×2 both ends. Mounting (BSED): Basic, LB, FA, TC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø125mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 5734 N |
| 0.7 MPa (max) | 8027 N |
| Max drive (@0.7 MPa) | 819 kgf |
A rod exits both ends, so force is equal on extend and retract. Drive force is separate from the 8600 N static lock holding force. Size with a safety margin.
Model Code: Airtac BSED Clamping Double Acting Cylinder BSED125X50
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×50 | 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 BSED125X50 Is Used
Heavy Vertical Lifts
Holds elevated platens carrying heavy molds securely at 8600 N during air loss, while providing 8028 N of equal both-way force to raise and lower the mass smoothly.
Multi-Station Machining
Uses the rear rod extension for cam-actuated sequencing while the front rod clamps parts in place, leveraging the anti-rotation properties of the dual-rod design.
Pallet Stop Gates
Arrests heavy pallet traffic using the spring-applied collet, maintaining a rigid stop with zero live air while the double-rod body cycles the gate at high speed.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X50 the Right Cylinder?
Select this 125 mm bore when an application demands both-way symmetric thrust up to 8028 N at 0.7 MPa and a static hold up to 8600 N. If your load requires less force, the neighboring 100 mm bore provides 3681 N at 0.5 MPa with a 5500 N holding force. If you need more, the 125 mm is the largest standard BSED size available.
Verify your load stays within the 8600 N holding limit and engage the lock only after the rod completely stops. Release the lock only when both piston sides are pressure-balanced, allowing at least 0.5 seconds for the collet to clear. For exact replacement matching, confirm the 50 mm stroke, PT1/2 port thread, and your chosen mounting style (Basic, LB, FA, or TC).
Quick checklist
- ✓ Need both symmetric force AND fail-safe hold?
- ✓ Load to hold ≤ 8600 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 BSED125X50 FAQ
The drive force is equal in both directions at 5734 N at 0.5 MPa and 8028 N at 0.7 MPa (max 819 kgf). The integrated spring-applied rod lock provides a bidirectional static holding force of 8600 N with no live air.
The lock is a fail-safe collet that clamps the rod if air pressure is lost. It is not a dynamic brake, so engage it only after the rod stops. To release, apply air to the G1/8 release port only after both cylinder sides are pressure-balanced, allowing at least 0.5 seconds for the collet to retract.
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