Airtac BSE Clamp Standard Cylinder BSE125X450S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X450S 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, 450mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke450 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X450S
The AirTAC BSE125X450S is a double-acting ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. It delivers a massive 8600 N bidirectional static holding force, ensuring suspended loads remain safely locked in place even if air pressure drops. Operating pressure is capped at 0.7 MPa, and the lock is controlled via a separate G1/8 release port.
Equipped with a -S magnet for CMSE and DMSE sensors, this 125 mm bore cylinder provides 6136 N push and 5734 N pull force at 0.5 MPa. The lock is a holding device, not a dynamic brake; engage it only after the piston stops and allow at least 0.5 s for full release before cycling. SE mounting accessories fit this body entirely, except for the FTC variant.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X450S 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 BSE125X450S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X450S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 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 BSE125X450S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | Bore size in mm. |
| ×450 | 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 BSE125X450S Is Used
Heavy Vertical Lift Hold
Secures 8600 N vertical press rams or heavy lifting stages instantly if air exhausts, preventing catastrophic drops during E-stop events.
Large Injection Mold Clamp
Holds heavy injection molding platens rigidly in place during air loss, utilizing the spring-applied collet to maintain exact positioning.
Overhead Crane Stop
Locks heavy overhead crane trolleys or large automated gantry loads securely at target positions without relying on continuous live air.
Is the Airtac BSE Clamp Standard Cylinder BSE125X450S the Right Cylinder?
Verify your load stays under the 8600 N holding capacity. If you need less 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 force, this 125 mm bore is the largest available, offering an 8590 N push at 0.7 MPa and an 876 kgf max drive. Because the 450 mm stroke is long, use a guide to prevent side-load damage. To replace this unit, match the 125 mm bore, 450 mm stroke, PT1/2 port, and -S magnet. Remember to balance pressures before unlocking.
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 BSE125X450S FAQ
The spring-applied collet clamps instantly, delivering an 8600 N bidirectional static hold with no live air. It is a fail-safe lock, not a dynamic brake; engage it only after the rod stops.
At 0.5 MPa, push is 6136 N and pull is 5734 N. At 0.7 MPa, push is 8590 N, max drive is 876 kgf, and the static holding force is 8600 N.
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