Airtac BSE Clamp Standard Cylinder BSE40X125
The AirTAC Airtac BSE Clamp Standard Cylinder BSE40X125 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 Ø16mm rod and holds up to 900 N in either direction — no drift. Ø40mm bore, 125mm stroke, PT1/4 cylinder ports, G1/8 lock-release port.
- BoreØ40 mm
- Stroke125 mm
- Static holding force900 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/4
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE40X125
The AirTAC BSE40X125 is a double-acting, single-rod ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. It delivers a 900 N bidirectional static holding force to secure loads in place with no live air required. Operating pressure is capped at 0.7 MPa, and the lock utilizes a dedicated G1/8 release port entirely separate from the PT1/4 cylinder drive ports.
This fail-safe collet mechanism engages automatically if air pressure is lost, exhausted, or an emergency stop is triggered. The lock is not a dynamic brake: it must be engaged only after the piston rod has completely stopped. To release the clamp safely, balance pressures on both sides of the piston and allow at least 0.5 seconds before commanding movement.
Rod Lock — 900 N Static Holding (Ø40mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE40X125 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 BSE40X125 Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE40X125 |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Static holding force | 900 N |
| Cylinder port | PT1/4 |
| Lock-release port | G1/8 |
| Rod thread | M12×1.25 |
|---|---|
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 800 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa (max) | 880 N | — |
| Max drive (@0.7 MPa) | 90 kgf | |
Drive force is separate from the 900 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 BSE40X125
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 40 | 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 BSE40X125 Is Used
Palletizer Head Hold
Secures a vertical palletizer head mid-stroke, using the 900 N holding force to prevent gravity-driven drift during an air pressure loss event.
Drill Spindle Clamp
Locks a 628 N drill spindle at a precise 125 mm depth, ensuring the collet holds the tool rigidly when the main air supply is exhausted.
Pneumatic Stop Gate
Holds a conveyor diverter gate firmly in position during E-stop activation, relying on the spring-applied collet rather than live air pressure.
Is the Airtac BSE Clamp Standard Cylinder BSE40X125 the Right Cylinder?
Verify your suspended load requires less than the 900 N static holding force to prevent drift. If you need less clamping force, step down to the BSE32 bore, which offers a 402 N push at 0.5 MPa and a 600 N hold. If your load exceeds 900 N, step up to the BSE50, providing a 982 N push at 0.5 MPa and a 1400 N hold.
When replacing this unit, match the 40 mm bore, 125 mm stroke, PT1/4 port thread, and basic mounting style. Note that standard SE mounting accessories fit this ISO 15552 body perfectly, except for the FTC variant. This specific SKU lacks a magnet (-S), so it does not support CMSE or DMSE position sensors.
Quick checklist
- ✓ Load to hold ≤ 900 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 BSE40X125 FAQ
The lock is spring-applied and fail-safe. Upon air loss or E-stop, the collet clamps the 16 mm rod, providing a 900 N bidirectional static hold. It is not a dynamic brake; the rod must be stopped before engagement.
The drive force is separate from the 900 N holding force. At 0.5 MPa, push is 628 N and pull is 528 N. At the 0.7 MPa ceiling, push is 879 N, yielding a maximum drive force of 90 kgf.
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