Airtac BSE Clamp Standard Cylinder BSE125X400
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X400 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, 400mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke400 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X400
The AirTAC BSE125X400 is a double-acting ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A collet mechanism delivers a bidirectional static holding force of 8600 N. If air pressure drops or an emergency stop triggers, the lock engages automatically to hold the load safely in place without requiring live air.
This 125 mm bore unit operates at 0.15-0.7 MPa and includes a separate G1/8 release port to disengage the lock. The cylinder itself uses a PT1/2 port, a Ø32 mm rod with an M27x2 thread, and adjustable air cushions at both ends. Note that this specific SKU lacks a magnet, meaning position sensing via CMSE or DMSE sensors is not supported.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X400 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 BSE125X400 Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X400 |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 400 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 BSE125X400
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | Bore size in mm. |
| ×400 | 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 BSE125X400 Is Used
Injection Mold Platens
Secures heavy mold platens mid-stroke. The 8600 N collet lock prevents sudden drops if factory air fails, safely holding the 8590 N max drive load.
Automated Press Rams
Maintains press ram position during material loading. The fail-safe spring-applied lock engages instantly on E-stop, securing the load without live air.
Pallet Stopper Gates
Holds heavy pallets on an inclined conveyor. The bidirectional lock resists 8600 N of static force, ensuring the gate stays shut even if the air supply is exhausted.
Is the Airtac BSE Clamp Standard Cylinder BSE125X400 the Right Cylinder?
Verify your suspended load stays below the 8600 N holding capacity, and compare it against the drive forces: 6136 N push and 5734 N pull at 0.5 MPa, or 8590 N push at 0.7 MPa (max 876 kgf drive). If you need less force, the adjacent 100 mm bore provides 3927 N push at 0.5 MPa with a 5500 N hold. Since the BSE125X400 is the largest standard bore, it is the maximum capacity option available in this series.
For safe operation, engage the lock only after the piston rod has completely stopped moving. Release the lock only when pressures on both sides of the piston are balanced, allowing at least 0.5 seconds before resuming motion. At 400 mm stroke, ensure external guides are used to prevent side-load wear on the seals. This unit uses a PT1/2 cylinder port, a G1/8 release port, and no magnet. It accepts all SE-compatible mounting accessories except FTC.
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 BSE125X400 FAQ
The lock is spring-applied and air-released, meaning it fails safe. On air loss, a collet clamps the rod with 8600 N of static holding force. The drive forces are 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, with a max drive of 876 kgf.
No, this specific SKU does not include a magnet (-S option), so CMSE reed and DMSE electronic sensors cannot be used for position detection. You would need an S-suffix variant for sensing capabilities.
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