Airtac BSE Clamp Standard Cylinder BSE125X250S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X250S is a genuine double-acting ISO 15552 cylinder with an integrated spring-applied, air-released ROD LOCK. If air is cut or an E-stop is hit, the collet clamps the Ø32mm rod and holds up to 8600 N in either direction — no drift. Ø125mm bore, 250mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke250 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X250S
The AirTAC BSE125X250S is a double-acting ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. A collet clamps the 32mm rod instantly upon air loss or E-stop activation, delivering a bidirectional static holding force of 8600 N without requiring live air. Operating pressure is capped at 0.7 MPa, and unlocking requires 0.15-0.7 MPa supplied to the separate G1/8 release port.
This model includes a magnet for position sensing with CMSE reed or DMSE electronic sensors. The lock is a fail-safe holding device, not a dynamic brake; it must engage only after the rod stops, and you must allow at least 0.5 s for full release after balancing piston pressures before moving. The 40mm adjustable air cushions absorb end-of-stroke impact, but the collet lock provides the actual holding force.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X250S holds its position in both directions when air is lost, exhausted or an E-stop trips. Apply 0.15–0.7 MPa to the G1/8 release port to unlock. Engage the lock only after the rod has stopped (it is not a dynamic brake), and release only when the pressures on both sides of the piston are balanced. Allow at least 0.5 s for full release before moving.
Airtac BSE Clamp Standard Cylinder BSE125X250S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X250S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 250 mm |
| Static holding force | 8600 N |
| Cylinder port | PT1/2 |
| Lock-release port | G1/8 |
| Rod thread | M27×2 |
|---|---|
| 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 |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC BSE datasheet. The lock uses the SE standard body; SE mounting accessories fit BSE except FTC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa (max) | 8590 N | — |
| Max drive (@0.7 MPa) | 876 kgf | |
Drive force is separate from the 8600 N static holding force of the lock. BSE operates up to 0.7 MPa. Size with a safety margin.
Model Code: Airtac BSE Clamp Standard Cylinder BSE125X250S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Thread: PT (blank) / G. Mounting (BSE): Basic, LB, FA, FB, CA, CB, CR, TC (FTC is not available on BSE). Related: SE (no lock), BSED (double-rod rod lock). Sensors CMSE/DMSE fit magnetic BSE.
Where the Airtac BSE Clamp Standard Cylinder BSE125X250S Is Used
Heavy Press Ram Hold
Secures a 500kg metal-stamping ram mid-stroke. The 8600 N collet lock engages instantly on air loss, preventing the heavy tooling from crashing down on operators.
Injection Mold Clamp
Holds a mold-half positioning actuator firmly during machine maintenance. The fail-safe spring-applied collet sustains the load even when the main plant air is exhausted.
Automated Welding Gate
Locks a 250mm stroke welding partition in the open position. The 8590 N drive force easily moves the heavy shield, while the lock keeps it stationary during E-stop cycles.
Is the Airtac BSE Clamp Standard Cylinder BSE125X250S the Right Cylinder?
Verify your suspended load stays below the 8600 N static holding limit and that the required motion force is within the 8590 N push at 0.7 MPa. If your load is lighter, stepping down to the 100mm bore offers 3927 N push at 0.5 MPa and 5500 N holding force. As the largest standard bore, there is no larger option; if 8600 N is insufficient, you must redesign the mechanical leverage. The -S magnet on this unit supports CMSE and DMSE sensors. When replacing, match the 125mm bore, 250mm stroke, PT1/2 cylinder port, and mounting style. All SE mounting accessories fit except FTC. For this 250mm stroke, use guide rails to prevent side-load wear on the barrel and collet.
Quick checklist
- ✓ Load to hold ≤ 8600 N?
- ✓ Fail-safe hold on air loss / E-stop needed
- ✓ Lock engaged only when stopped
- ✓ G1/8 release-air line available
- ✓ Magnet (-S) for CMSE/DMSE sensors?
Installation & Safety Notes
- check Engage the lock only after the rod has stopped — not as 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 Add safety-rated controls for man-rated / overhead loads.
- check Use SE mounting accessories (FTC excepted).
Airtac BSE Clamp Standard Cylinder BSE125X250S FAQ
The drive force is 6136 N push and 5734 N pull at 0.5 MPa, and 8590 N push at 0.7 MPa (max 876 kgf drive). The integrated spring-applied rod lock provides a separate bidirectional static holding force of 8600 N with no live air.
The lock is spring-applied and air-released via the G1/8 port. To release safely, first balance the air pressure on both sides of the piston, then supply 0.15-0.7 MPa to the release port. Always allow at least 0.5 seconds for the collet to fully disengage before commanding cylinder motion.
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