Airtac BSE Clamp Standard Cylinder BSE125X250
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X250 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 BSE125X250
The AirTAC BSE125X250 is a double-acting, single-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. It provides a massive 8600 N bidirectional static holding force, ensuring suspended loads remain exactly where they stopped if air pressure is lost or an E-stop is triggered. Operating pressure is capped at 0.7 MPa, and it utilizes a separate G1/8 release port to unlock the clamping collet.
This 125 mm bore unit delivers a drive force of 8590 N at 0.7 MPa, completely separate from the 8600 N static holding force of the lock. It features a 32 mm rod, an M27x2 rod-end thread, PT1/2 cylinder ports, and a 40 mm adjustable air cushion at both ends. This specific SKU lacks a magnet (-S), so position sensing via CMSE or DMSE sensors is not supported. SE-compatible mounting accessories fit this body perfectly, with the sole exception of the FTC foot mount.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X250 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 BSE125X250 Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X250 |
|---|---|
| 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 BSE125X250
| 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 BSE125X250 Is Used
Heavy Vertical Lift Hold
Secures 8600 N vertical loads on large machining center elevators, preventing catastrophic drops when main air supply is exhausted during an emergency stop.
Overhead Tool Clamp
Locks heavy machining fixtures in place with 8600 N of fail-safe force, ensuring a multi-ton casting does not shift or fall if the pneumatic supply drops unexpectedly.
Press Safety Gate
Holds massive industrial press safety gates firmly shut against 8590 N of drive force, keeping the barrier immobile during cycle entry and air loss events.
Is the Airtac BSE Clamp Standard Cylinder BSE125X250 the Right Cylinder?
Verify your load does not exceed the 8600 N holding force. If you need less force, step down to the 100 mm bore, which offers a 3927 N push at 0.5 MPa and a 5500 N hold. If you require more, the 125 mm is the largest standard BSE bore available. Always engage the lock only after the rod has completely stopped, and release it only when pressures on both sides of the piston are balanced, allowing at least 0.5 seconds for full release before moving. Since this 250 mm stroke is under 300 mm, side-load risks are minimal, but proper ISO 15552 mounting alignment remains essential. To replace this unit, match the 125 mm bore, 250 mm stroke, PT1/2 port, basic mounting, and no-magnet configuration.
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 BSE125X250 FAQ
The rod lock is spring-applied and air-released, meaning a loss of air pressure instantly engages the clamping collet. It provides an 8600 N bidirectional static hold with no live air, keeping the rod fixed in its stopped position. It is a holding lock, not a dynamic brake, so it must only be engaged after the rod has ceased moving.
The drive force is separate from the holding force. At 0.5 MPa, push is 6136 N and pull is 5734 N. At the 0.7 MPa ceiling, push is 8590 N, yielding a max drive of 876 kgf. The static holding force of the spring-applied lock is 8600 N.
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