Airtac BSE Clamp Standard Cylinder BSE50X250
The AirTAC Airtac BSE Clamp Standard Cylinder BSE50X250 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 BSE50X250
The AirTAC BSE50X250 is a double-acting ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. A collet clamps the Ø20 mm piston rod to deliver a 1400 N bidirectional static holding force. If air pressure drops or an E-stop trips, the lock engages instantly to hold the load safely in place. Operating pressure is capped at 0.7 MPa.
This fail-safe mechanism is a true holding lock, not a dynamic brake. You must engage it only after the rod stops, and release it only when pressures on both piston sides are balanced. Unlocking requires 0.15-0.7 MPa supplied to the separate G1/8 release port, with at least 0.5 s allowed for full release before moving. The cylinder itself uses a PT1/4 port and includes adjustable air cushions at both ends.
Rod Lock — 1400 N Static Holding (Ø50mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE50X250 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 BSE50X250 Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE50X250 |
|---|---|
| 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 BSE50X250
| 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 BSE50X250 Is Used
Vertical Lift Holding
Holds a 1400 N vertical lift assembly mid-stroke. If air fails, the spring collet engages to prevent a dropped load, while the drive provides 982 N push at 0.5 MPa to move the lift.
Pneumatic Tool Clamp
Secures a machining fixture. The lock maintains 1400 N of clamping force with zero live air, ensuring the tool stays fixed during an emergency exhaust.
Pallet Stop Gate
Acts as a mid-conveyor stop for pallets. The 825 N pull force at 0.5 MPa retracts the gate, and the fail-safe lock holds it open during E-stops to clear the line.
Is the Airtac BSE Clamp Standard Cylinder BSE50X250 the Right Cylinder?
Verify your suspended load does not exceed the 1400 N static holding force. If your load is lighter, the 40 mm bore offers a 628 N push at 0.5 MPa and a 900 N hold. If you need more holding power, step up to the 63 mm bore, which provides a 1559 N push at 0.5 MPa and a 2200 N hold.
Follow the safety operating rule: engage the lock only when stopped, and release it only after balancing both sides. Allow at least 0.5 s for full release before moving. This 250 mm stroke is a standard length, but for any stroke 300 mm or longer, add a guide to prevent side-load wear. To replace this unit, match the 50 mm bore, 250 mm stroke, PT1/4 port, and basic mounting. SE mounting accessories fit this body perfectly, except for FTC. This SKU has no magnet (-S), so position sensing is not available.
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 BSE50X250 FAQ
It provides a 1400 N bidirectional static holding force. The spring-applied collet clamps the rod automatically if air is lost, exhausted, or an E-stop trips, holding the load in place with no live air.
The drive force is separate from the holding force. At 0.5 MPa, push is 982 N and pull is 825 N. At the 0.7 MPa ceiling, push is 1374 N, yielding a max drive of 140 kgf. The static lock holding force remains 1400 N.
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