Airtac BSE Clamp Standard Cylinder BSE50X300S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE50X300S 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, 300mm stroke, PT1/4 cylinder ports, G1/8 lock-release port.
- BoreØ50 mm
- Stroke300 mm
- Static holding force1400 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/4
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE50X300S
The AirTAC BSE50X300S is a double-acting ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. It provides a bidirectional static holding force of 1400 N with no live air, delivering true fail-safe drift protection for suspended or vertical loads. Operating pressure is capped at 0.7 MPa, and the cylinder runs at speeds of 30-800 mm/s.
The lock uses a clamping collet actuated by a spring, released via a separate G1/8 port supplying 0.15-0.7 MPa. This mechanism is distinct from the adjustable air cushions at both ends, which absorb end-of-stroke impact but do not hold the load. The -S magnet option supports CMSE reed and DMSE electronic sensors for position feedback.
Rod Lock — 1400 N Static Holding (Ø50mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE50X300S 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 BSE50X300S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE50X300S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 300 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 BSE50X300S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 50 | Bore size in mm. |
| ×300 | 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 BSE50X300S Is Used
Vertical Pneumatic Lift
Holds a 140 kg vertical lift stage mid-travel. The 1400 N fail-safe collet engages instantly on air loss, preventing gravity-driven drift.
Machine Tool Clamp
Secures a machined part during CNC milling. If shop air drops, the spring-applied lock maintains 1400 N of clamping force without live air.
Pallet Stop Gate
Acts as a mid-process stop gate on a conveyor. The lock holds the 300 mm extended rod rigid against 982 N of drive force during an E-stop.
Is the Airtac BSE Clamp Standard Cylinder BSE50X300S the Right Cylinder?
Verify your load does not exceed the 1400 N holding force. If you need less force, step down to the 40 mm bore, which offers 628 N push at 0.5 MPa and 900 N holding. If you need more, step up to the 63 mm bore, providing 1559 N push at 0.5 MPa and 2200 N holding. Ensure the lock is engaged only after the rod completely stops, and release it only when piston pressures are balanced, allowing at least 0.5 s before moving.
For a drop-in replacement, match the 50 mm bore, 300 mm stroke, PT1/4 cylinder port, and your specific mounting choice. Note that SE mounting accessories fit this ISO 15552 body perfectly, except for FTC. Because the stroke is 300 mm, use a guide to prevent excessive side-load moments on the extended rod.
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 BSE50X300S FAQ
The spring-applied collet engages immediately on air loss, providing 1400 N of bidirectional static holding force. The drive forces are separate: 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.
Balance the pressures on both sides of the piston first. Then supply 0.15-0.7 MPa to the separate G1/8 release port. Allow at least 0.5 seconds for the collet to fully retract before commanding cylinder movement to prevent dynamic braking damage.
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