Airtac BSE Clamp Standard Cylinder BSE125X550S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X550S 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, 550mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke550 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X550S
The AirTAC BSE125X550S 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, ensuring suspended loads stay exactly where they stopped during an E-stop or pressure loss. Operating pressure is capped at 0.7 MPa.
This 125 mm bore, 550 mm stroke unit drives 8590 N of push force at 0.7 MPa while running at 30-500 mm/s. The lock uses a separate G1/8 release port and a 40 mm adjustable air cushion at both ends. Equipped with a -S magnet, it supports CMSE reed and DMSE electronic position sensing.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X550S 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 BSE125X550S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X550S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 550 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 BSE125X550S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | Bore size in mm. |
| ×550 | 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 BSE125X550S Is Used
Heavy Palletizer Arms
Secures vertical lifting arms carrying 800 kg pallets, providing 8600 N of fail-safe holding force so loads cannot plummet if the main air supply abruptly drops.
Large Press Tooling
Holds heavy stamping dies mid-stroke during maintenance; the spring-applied collet locks the 8590 N drive force in place without needing continuous live air pressure.
Overhead Crane Stops
Locks heavy material handling carriages safely at target positions during an emergency stop, preventing dangerous drift along the rail while loads are transferred.
Is the Airtac BSE Clamp Standard Cylinder BSE125X550S the Right Cylinder?
Verify your static load is safely at or below the 8600 N holding capacity. If stepping down, the 100 mm bore provides 3927 N push at 0.5 MPa and 5500 N holding force. As the largest standard size, 125 mm is your maximum option. Always engage the collet lock only after the piston rod has completely stopped moving.
For replacements, match the 125 mm bore, 550 mm stroke, PT1/2 cylinder port, and basic mounting style. Because this stroke is 550 mm, use external guide rails to prevent side-loading damage to the seal and rod. SE mounting accessories fit this body perfectly, except for 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 BSE125X550S FAQ
The integrated rod lock is spring-applied, so a loss of air pressure instantly engages the clamping collet. This provides a bidirectional static holding force of 8600 N, securely freezing the piston rod exactly where it stopped without needing live air.
At 0.5 MPa, push force is 6136 N and pull is 5734 N. At the 0.7 MPa maximum, push is 8590 N (876 kgf max drive). The separate static holding force from the rod lock is 8600 N. Release the lock via the G1/8 port only after balancing piston pressures and waiting at least 0.5 s.
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