Airtac BSE Clamp Standard Cylinder BSE125X125S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X125S 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, 125mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke125 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X125S
The AirTAC BSE125X125S is a double-acting ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. A collet mechanism delivers a bidirectional static holding force of 8600 N to prevent drift on air loss. Operating pressure is capped at 0.7 MPa, and the separate G1/8 release port unlocks the clamp when balanced.
This 125 mm bore unit provides a drive force of 8590 N at 0.7 MPa, completely separate from the holding force. The S suffix indicates a magnet for CMSE reed or DMSE electronic sensors. SE mounting accessories fit this body, except FTC.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X125S 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 BSE125X125S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X125S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 BSE125X125S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | Bore size in mm. |
| ×125 | 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 BSE125X125S Is Used
Heavy Vertical Lifts
Secures 8600 N suspended machinery assemblies on vertical stages, preventing catastrophic drops during air loss.
Large Press Hold
Clamps heavy stamping dies with 8590 N drive force, locking the tool safely mid-cycle if E-stop is hit.
Overhead Crane Stop
Holds heavy factory door loads firmly in place at 125 mm stroke without relying on continuous live air pressure.
Is the Airtac BSE Clamp Standard Cylinder BSE125X125S the Right Cylinder?
Verify your load stays under the 8600 N holding force. If you need less drive, the 100 mm bore offers 3927 N push at 0.5 MPa and a 5500 N hold. For more force, this 125 mm is the largest standard size. Engage the lock only after the rod stops, and allow at least 0.5 s for release before moving. Match the 125 mm stroke, PT1/2 port, and magnet option for replacements.
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 BSE125X125S FAQ
The drive force is 6136 N push and 5734 N pull at 0.5 MPa, or 8590 N push at 0.7 MPa (876 kgf max drive). The static holding force of the rod lock is 8600 N.
The lock is spring-applied, so losing air causes the collet to clamp the rod instantly, holding the load in both directions. Release it via the G1/8 port only after pressures are balanced.
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