Airtac BSE Clamp Standard Cylinder BSE125X50
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X50 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 Ø32mm rod and holds up to 8600 N in either direction — no drift. Ø125mm bore, 50mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke50 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X50
The AirTAC BSE125X50 is a double-acting ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. It provides a massive 8600 N bidirectional static holding force with zero live air, ensuring suspended loads stay exactly where they stopped during E-stop or pressure loss. Operating pressure is capped at 0.7 MPa, and the lock is released via a dedicated G1/8 port.
This 125 mm bore unit uses a Ø32 mm rod with an M27x2 thread and PT1/2 cylinder ports. Because it uses the standard SE body, all SE mounting accessories fit perfectly except the FTC variant. This specific SKU lacks a magnet, so it does not support CMSE or DMSE position sensors.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X50 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 BSE125X50 Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X50 |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 50 mm |
| Static holding force | 8600 N |
| Cylinder port | PT1/2 |
| Lock-release port | G1/8 |
| Rod thread | M27×2 |
|---|---|
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa (max) | 8590 N | — |
| Max drive (@0.7 MPa) | 876 kgf | |
Drive force is separate from the 8600 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 BSE125X50
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | Bore size in mm. |
| ×50 | 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 BSE125X50 Is Used
Injection Mold Platens
Holds heavy injection molding platens safely mid-cycle. The 8600 N lock engages instantly on air loss, preventing the 8590 N drive force from drifting under gravity.
Palletizer Lift Carriage
Secures a vertical palletizer lift carriage during an E-stop. The fail-safe collet clamps the Ø32 mm rod, stopping uncontrolled descent of heavy pallet loads.
Press Tool Clamp
Locks a heavy stamping press tool firmly in position. If shop air drops, the spring-applied collet maintains the hold without relying on the 40 mm air cushions.
Is the Airtac BSE Clamp Standard Cylinder BSE125X50 the Right Cylinder?
Verify your load stays below the 8600 N holding limit. If you need less holding force, step down to the 100 mm bore (3927 N push @0.5 MPa, 5500 N hold). If you need more drive, note this 125 mm bore is the largest available (6136 N push @0.5 MPa, 8600 N hold). The lock is a static hold, not a dynamic brake: engage it only after the rod stops, and release it only when piston pressures are balanced, allowing at least 0.5 s before moving. Match replacement parts by confirming the 50 mm stroke, PT port thread, and mounting code.
Quick checklist
- ✓ Load to hold ≤ 8600 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 BSE125X50 FAQ
The drive force is 6136 N push and 5734 N pull at 0.5 MPa, reaching 8590 N push (876 kgf) at 0.7 MPa. The separate static holding force of the rod lock is 8600 N, which holds the load with no live air.
The spring-applied collet fails safe, instantly clamping the rod bidirectionally up to 8600 N. To release it, supply 0.15-0.7 MPa to the G1/8 release port, ensure piston pressures are balanced, and wait at least 0.5 s before moving.
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