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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
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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