Airtac BSE Clamp Standard Cylinder BSE125X350
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X350 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, 350mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke350 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X350
The AirTAC BSE125X350 is a double-acting, single-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. It delivers a massive 8590 N push force at 0.7 MPa while providing a bidirectional fail-safe holding force of 8600 N. Because the collet clamp engages automatically upon air loss, suspended loads remain safely locked in place without consuming live air.
This 125 mm bore, 350 mm stroke unit uses a separate G1/8 release port to overcome the locking spring, requiring balanced piston pressures and at least 0.5 seconds before commanding motion. The extruded aluminum barrel body accepts SE-compatible mounting accessories (except FTC), and this specific SKU omits the magnetic piston, meaning no CMSE or DMSE position sensing is installed.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X350 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 BSE125X350 Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X350 |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 BSE125X350
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | Bore size in mm. |
| ×350 | 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 BSE125X350 Is Used
Heavy Press Tooling Clamp
Secures large stamping dies and heavy press rams. The 8600 N fail-safe lock prevents the tool from dropping if factory air supply is suddenly exhausted during mid-cycle E-stops.
Palletizer Lift Arm
Holds a suspended 350 kg load vertically during transfer. The spring-applied collet locks instantly on air loss, preventing catastrophic drops while the 8590 N drive force handles the lift.
Automated Stop Gate
Acts as a physical barrier on heavy-duty material handling lines. The lock maintains the gate rigidly in the extended position with zero live air, enduring repeated impact loads from passing product.
Is the Airtac BSE Clamp Standard Cylinder BSE125X350 the Right Cylinder?
Verify your required holding load does not exceed the 8600 N static rating. If your application demands less drive power, stepping down to the 100 mm bore yields a 3927 N push at 0.5 MPa and a 5500 N hold. Conversely, this 125 mm bore is the maximum standard size, offering the highest available 6136 N push at 0.5 MPa alongside its 8600 N hold. Always engage the lock only after the rod has completely stopped, and release it only when pressures are balanced.
For this 350 mm stroke, ensure external guide rails are used to prevent excessive side-loading on the piston rod, which could bind the collet mechanism. When replacing a unit, match the 125 mm bore, 350 mm stroke, PT1/2 cylinder port, and mounting style. Note that operating pressure is capped at 0.7 MPa, lower than standard non-locking cylinders.
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 BSE125X350 FAQ
The drive force at 0.5 MPa is 6136 N push and 5734 N pull. At the 0.7 MPa operating ceiling, push is 8590 N (876 kgf max drive). The static fail-safe holding force of the rod lock is 8600 N, which is entirely separate from the pneumatic drive force.
The lock is spring-applied, meaning a collet clamps the rod instantly in both directions if air is lost or exhausted, holding the load up to 8600 N. It is not a dynamic brake; you must engage it only after the rod stops, and release it only when piston pressures are balanced, allowing at least 0.5 seconds before moving.
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