Airtac BSE Clamp Standard Cylinder BSE50X250SFB
The AirTAC Airtac BSE Clamp Standard Cylinder BSE50X250SFB 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 BSE50X250SFB
The AirTAC BSE50X250SFB is a double-acting ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. A collet clamps the Ø20 mm rod to provide a bidirectional static holding force of 1400 N. If air pressure drops or an emergency stop trips, the lock engages automatically to hold the load in place without live air.
Operating pressure is capped at 0.7 MPa, and unlocking requires 0.15-0.7 MPa supplied to the separate G1/8 release port. The cylinder features adjustable air cushions at both ends and a -S magnet for CMSE or DMSE sensors. It uses an FB front-back mounting interface and SE-compatible accessories, except FTC.
Rod Lock — 1400 N Static Holding (Ø50mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE50X250SFB 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 BSE50X250SFB Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE50X250SFB |
|---|---|
| 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 BSE50X250SFB
| 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 BSE50X250SFB Is Used
Vertical Lift Hold
Holds a 1400 N vertical machining head in place during an air pressure loss, preventing a crash drop.
Tool Clamp Lock
Secures a 982 N pneumatic tool clamp at 0.5 MPa so the workpiece stays gripped if the main air supply is exhausted.
Pallet Stop Gate
Locks a 250 mm stroke pallet stop gate in the extended position during an E-stop, keeping the collet clamped with no live air.
Is the Airtac BSE Clamp Standard Cylinder BSE50X250SFB the Right Cylinder?
Verify your suspended load needs 1400 N or less of holding force. If you need less drive, the 40 mm bore provides 628 N push at 0.5 MPa and 900 N hold; for more power, the 63 mm bore offers 1559 N push at 0.5 MPa and 2200 N hold. 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. At 250 mm stroke, use a guide to prevent side-load wear on the seals.
To replace this cylinder, match the 50 mm bore, 250 mm stroke, PT1/4 port, FB mounting, and -S magnet. The drive force is 982 N push and 825 N pull at 0.5 MPa, reaching 1374 N push at 0.7 MPa.
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 BSE50X250SFB FAQ
The drive force is 982 N push and 825 N pull at 0.5 MPa, reaching 1374 N push at 0.7 MPa for a max drive of 140 kgf. The separate spring-applied rod lock provides a 1400 N static holding force with no live air.
The lock is spring-applied and fail-safe. If air is lost or exhausted, the collet clamps the rod immediately for bidirectional hold. To release it, apply 0.15-0.7 MPa to the G1/8 port, ensure pressures are balanced, and wait at least 0.5 s before moving.
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