Airtac BSED Clamping Double Acting Cylinder BSED125X175
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X175 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, 175mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke175 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED125X175
The AirTAC BSED125X175 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 drive force of 5734 N each way at 0.5 MPa. The collet lock provides a bidirectional fail-safe static holding force of 8600 N without requiring live air.
This 125 mm bore unit uses a PT1/2 cylinder port and a dedicated G1/8 release port. Operating pressure is capped at 0.7 MPa, and the extruded aluminum barrel design omits external tie rods. This specific SKU lacks a magnet, so it does not support position sensing.
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 BSED125X175 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 BSED125X175 Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X175 |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 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 BSED125X175
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×175 | 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 BSED125X175 Is Used
Heavy Machining Fixture
Clamps heavy cast iron blocks using 8028 N equal both-way force, while the 8600 N lock prevents fixture drift during high-energy cutting operations.
Vertical Pallet Lift
Lifts loaded pallets vertically with symmetric force, engaging the fail-safe collet to hold the 8600 N load securely in place during air loss events.
Pallet Stopper Gate
Uses the rear exiting rod as a mechanical stop flag, holding 8600 N against moving conveyor traffic when the air supply is removed.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X175 the Right Cylinder?
Select this 125 mm bore model when your application requires both-way symmetric force and robust fail-safe holding. The lock safely resists loads up to 8600 N when engaged correctly after motion stops. If your load is lighter, the adjacent 100 mm bore provides 3681 N drive force at 0.5 MPa and 5500 N holding force. As the largest standard bore, stepping up requires a custom solution.
To release the lock safely, ensure both piston sides are pressure-balanced and allow at least 0.5 seconds before moving. At 175 mm stroke, side-load risks are moderate, but always guide the load to prevent binding. To replace this unit, match the 125 mm bore, 175 mm stroke, PT thread, and Basic/LB/FA/TC mounting.
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 BSED125X175 FAQ
The drive force is equal both ways at 5734 N at 0.5 MPa and 8028 N at 0.7 MPa (max 819 kgf). The separate static fail-safe holding force of the spring-applied lock is 8600 N.
The spring-applied collet clamps the rod instantly, providing up to 8600 N of bidirectional holding force with no live air. It is not a dynamic brake; engage it only after the rod stops.
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