Airtac BSE Clamp Standard Cylinder BSE125X400S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X400S 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, 400mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke400 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X400S
The AirTAC BSE125X400S is a double-acting single-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A collet clamps the Ø32 mm rod to deliver 8600 N of bidirectional static holding force without requiring live air. Operating pressure is capped at 0.7 MPa, and the lock is released via a separate G1/8 port.
This 125 mm bore, 400 mm stroke unit achieves a push force of 6136 N at 0.5 MPa and a maximum drive force of 8590 N at 0.7 MPa. The lock is fail-safe: if air is lost or an E-stop trips, the collet clamps and holds the load. Engage the lock only after the rod stops, and allow at least 0.5 s for full release before moving. The -S magnet supports CMSE reed and DMSE electronic sensors.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X400S 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 BSE125X400S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X400S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 400 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 BSE125X400S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | Bore size in mm. |
| ×400 | 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 BSE125X400S Is Used
Heavy Press Tool Clamp
Holds a massive 8600 N press fixture securely in place. If shop air drops, the spring collet engages instantly to prevent the tool from crashing into the workpiece.
Palletizer Vertical Lift
Drives a 8590 N vertical lift and locks the 400 mm stroke at any height. The fail-safe collet prevents a suspended pallet from falling during an emergency stop.
Automated Welding Gate
Positions a heavy welding guard with 6136 N push force. The spring-applied lock keeps the 400 mm gate fixed during air loss, protecting operators from moving parts.
Is the Airtac BSE Clamp Standard Cylinder BSE125X400S the Right Cylinder?
Verify your load does not exceed the 8600 N holding force and that the 876 kgf drive force is sufficient. If you need less drive and hold, the 100 mm bore neighbor offers 3927 N push at 0.5 MPa and a 5500 N hold. If you need more, step up to the 125 mm bore which already provides the maximum 8600 N hold and 6136 N push at 0.5 MPa. Because this 400 mm stroke is long, use a guide to prevent side-load damage to the seals and barrel.
The lock is a holding device, not a dynamic brake. Engage it only after the rod stops, and release it only when pressures on both sides of the piston are balanced. Allow at least 0.5 s for full release before commanding motion. When replacing, match the 125 mm bore, 400 mm stroke, PT1/2 cylinder port, and -S magnet. SE mounting accessories fit this body, except FTC.
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 BSE125X400S FAQ
The drive force is 6136 N push and 5734 N pull at 0.5 MPa, with a maximum push of 8590 N (876 kgf) at 0.7 MPa. The integrated rod lock provides a separate 8600 N bidirectional static holding force with no live air.
The lock is spring-applied, so if air is lost or exhausted, a collet clamps the Ø32 mm rod to hold the load in both directions. To release it safely, balance pressures on both sides of the piston and supply 0.15-0.7 MPa to the G1/8 release port, allowing at least 0.5 s before moving.
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