Airtac BSE Clamp Standard Cylinder BSE50X250S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE50X250S 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 Ø20mm rod and holds up to 1400 N in either direction — no drift. Ø50mm bore, 250mm stroke, PT1/4 cylinder ports, G1/8 lock-release port.
- BoreØ50 mm
- Stroke250 mm
- Static holding force1400 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/4
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE50X250S
The AirTAC BSE50X250S is a double-acting, single-rod ISO 15552 profile cylinder equipped with an integrated spring-applied, air-released rod lock. It delivers a drive force of 982 N push and 825 N pull at 0.5 MPa, operating within a 0.15-0.7 MPa pressure ceiling. A separate G1/8 release port supplies air to unlock the clamping collet.
This fail-safe mechanism provides a 1400 N bidirectional static holding force with no live air. If pressure drops, the collet immediately clamps the 20 mm rod, securing the load at its stopped position. The -S magnet enables position detection with CMSE reed or DMSE electronic sensors.
Rod Lock — 1400 N Static Holding (Ø50mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE50X250S 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 BSE50X250S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE50X250S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 250 mm |
| Static holding force | 1400 N |
| Cylinder port | PT1/4 |
| Lock-release port | G1/8 |
| Rod thread | M16×1.5 |
|---|---|
| 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 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa (max) | 1374 N | — |
| Max drive (@0.7 MPa) | 140 kgf | |
Drive force is separate from the 1400 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 BSE50X250S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 50 | Bore size in mm. |
| ×250 | 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 BSE50X250S Is Used
Vertical Pneumatic Lifts
Secures elevated platens carrying 100 kg workpieces, using the 1400 N holding force to prevent uncontrolled drops during an E-stop or sudden air loss.
Pallet Stop Gates
Holds indexing conveyor pallets firmly in place during robotic machining, relying on the spring-applied collet to maintain position if air exhausts.
Tooling Clamp Stations
Maintains clamping pressure on machined parts on overhead gantries, locking the 20 mm rod instantly when the 0.7 MPa supply is interrupted.
Is the Airtac BSE Clamp Standard Cylinder BSE50X250S the Right Cylinder?
Verify your load requires 1400 N or less of holding force. If you need less, the 40 mm bore offers 628 N push at 0.5 MPa and 900 N hold. If your load exceeds 50 mm capacity, step up to the 63 mm bore, providing 1559 N push at 0.5 MPa and 2200 N hold. Always engage the lock only after the rod fully stops, and release it only when piston pressures are balanced, allowing at least 0.5 s before moving. For this 250 mm stroke, ensure adequate side-load protection using external guide rails. Replace using 50 mm bore, 250 mm stroke, PT1/4 port, and your specific SE-compatible mounting (except FTC).
Quick checklist
- ✓ Load to hold ≤ 1400 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 BSE50X250S FAQ
The integrated rod lock is spring-applied, so a loss of air causes the collet to clamp the rod instantly. It provides a 1400 N bidirectional static holding force, maintaining the load position without live air until pressure is restored.
The drive force is 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, with a maximum drive of 140 kgf. The separate static holding force of the lock is 1400 N.
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