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
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.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC BSED Cylinders
Request a Quote for Airtac BSED Clamping Double Acting Cylinder BSED125X50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.