Airtac BSE Clamp Standard Cylinder BSE125X900
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X900 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, 900mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke900 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X900
The AirTAC BSE125X900 is a double-acting ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. It delivers a massive 8600 N bidirectional static holding force with zero live air, securing heavy suspended loads the moment pressure is lost or an E-stop trips. Operating pressure is capped at 0.7 MPa, and the cylinder runs at speeds of 30-500 mm/s.
The lock uses a mechanical collet that clamps the Ø32 mm piston rod, completely separate from the adjustable air cushions at both ends. A dedicated G1/8 release port unlocks the collet when supplied with 0.15-0.7 MPa. Because this SKU lacks the -S magnet option, it does not support CMSE or DMSE position sensors.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X900 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 BSE125X900 Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X900 |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 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 BSE125X900
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | Bore size in mm. |
| ×900 | 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 BSE125X900 Is Used
Heavy Vertical Press
Holds an 8600 N vertical press assembly in place instantly if shop air drops, preventing the ram from slipping downward.
Large Stamp Tooling
Clamps heavy stamping tooling securely during an E-stop, keeping the 8590 N drive force from drifting mid-cycle.
Overhead Crane Stop
Locks a suspended 900 mm stroke gate on an overhead conveyor firmly in both directions when the air supply is exhausted.
Is the Airtac BSE Clamp Standard Cylinder BSE125X900 the Right Cylinder?
Verify your load stays below the 8600 N holding force and matches the drive requirements: 6136 N push at 0.5 MPa, 5734 N pull at 0.5 MPa, and 8590 N push at 0.7 MPa (max 876 kgf). If you need less force, the adjacent 100 mm bore offers 3927 N push at 0.5 MPa and a 5500 N hold. If you need more, step up to a larger custom unit.
Engage the lock only after the rod fully stops, and release it only when pressures on both sides are balanced, allowing at least 0.5 s before moving. At this 900 mm stroke, use a guide rail to prevent side-load damage to the seals. This model uses a PT1/2 cylinder port, M27x2 rod thread, and accepts all SE mounting accessories except FTC.
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 BSE125X900 FAQ
The spring-applied collet clamps the rod instantly, providing 8600 N of bidirectional static holding force with no live air. It is a fail-safe hold, not a dynamic brake, so engage it only after the rod stops.
Drive force is 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, and max 876 kgf drive. The separate static holding force of the lock is 8600 N.
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