Airtac BSE Clamp Standard Cylinder BSE125X25S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X25S 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, 25mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke25 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X25S
The AirTAC BSE125X25S is a double-acting ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A collet clamps the 32 mm rod to deliver a bidirectional static holding force of 8600 N with zero live air required. Operating pressure is capped at 0.7 MPa, and the lock uses a dedicated G1/8 release port.
This fail-safe mechanism ensures the rod stays exactly where it stopped during an E-stop or pressure loss. The lock is not a dynamic brake; engage it only after the rod fully stops, balance pressures, and allow at least 0.5 s for release. The -S magnet supports CMSE reed and DMSE electronic sensors for position feedback.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X25S 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 BSE125X25S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X25S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 25 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 BSE125X25S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | Bore size in mm. |
| ×25 | 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 BSE125X25S Is Used
Heavy Vertical Press
Holds an 8600 N vertical press platen securely in place during an emergency air loss, preventing a catastrophic drop on the tooling below.
Large Injection Mold Clamp
Keeps a heavy injection mold halved shut with no live air required, ensuring the collet lock engages safely once the machine cycle stops.
Overhead Crane Stop
Locks the 32 mm rod to freeze a heavy material transfer carriage instantly during a facility E-stop, relying on the fail-safe collet rather than air cushions.
Is the Airtac BSE Clamp Standard Cylinder BSE125X25S the Right Cylinder?
Verify your suspended load requires a holding force at or below 8600 N. If your application needs less drive force, stepping down to the 100 mm bore yields a 3927 N push at 0.5 MPa and a 5500 N hold. If you need more drive power, the 125 mm bore is the largest available, providing a maximum drive of 876 kgf at 0.7 MPa.
When replacing a unit, match the 125 mm bore, 25 mm stroke, PT1/2 cylinder port, and your specific mounting hardware. SE mounting accessories fit this body perfectly, except for the FTC combination. Always balance piston pressures before supplying air to the G1/8 release port.
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 BSE125X25S FAQ
The spring-applied collet immediately clamps the rod, providing a bidirectional static holding force of 8600 N with no live air. The rod stays locked in both directions until air is restored to the G1/8 release port.
The drive force is separate from the holding force. At 0.5 MPa, push is 6136 N and pull is 5734 N. At 0.7 MPa, push is 8590 N, yielding a max drive of 876 kgf. The static holding force of the lock is 8600 N.
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