Airtac BSE Clamp Standard Cylinder BSE125X350S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X350S 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, 350mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke350 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X350S
The AirTAC BSE125X350S is a double-acting ISO 15552 profile cylinder featuring a 125mm bore, 350mm stroke, and an integrated spring-applied, air-released rod lock. A collet clamps the Ø32mm piston rod, delivering a 8600N bidirectional static holding force with zero live air. Operating pressure is capped at 0.15-0.7 MPa.
This fail-safe lock engages automatically if air is exhausted or an E-stop trips, securely holding the load at its stopped position. Unlocking requires 0.15-0.7 MPa supplied to the separate G1/8 release port. The -S magnet enables position sensing with CMSE reed or DMSE electronic switches.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X350S 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 BSE125X350S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X350S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 BSE125X350S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | Bore size in mm. |
| ×350 | 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 BSE125X350S Is Used
Heavy Vertical Lift Stage
Secures a 500kg vertical machining axis. The 8600N fail-safe collet locks the rod instantly on air loss, preventing a catastrophic plunge.
Stamping Press Slide
Holds an 800kg press slide safely between cycles. The 8590N drive force moves the heavy tooling, while the spring lock secures it during E-stop.
Pallet Stopper Gate
Blocks heavy pallet traffic on a packaging line. The lock holds the 350mm extended stop gate rigidly in place even if the plant air supply drops.
Is the Airtac BSE Clamp Standard Cylinder BSE125X350S the Right Cylinder?
Verify your suspended load stays below the 8600N static holding limit. If you need less drive force, the adjacent 100mm bore offers 3927N push at 0.5MPa and 5500N hold. For heavier demands, step up to the 125mm bore which provides 6136N push at 0.5MPa alongside this 8600N hold. The 350mm stroke requires a guide to prevent side-load wear on the seals.
Engage the lock only after the rod fully stops, and release it only when piston pressures are balanced, allowing at least 0.5s before moving. Replace an existing unit by matching the 125mm bore, 350mm stroke, PT1/2 port, and mounting. 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 BSE125X350S FAQ
The lock is spring-applied and fail-safe. If air is lost or exhausted, a collet clamps the rod, providing an 8600N bidirectional static hold at whatever position it stopped. It is not a dynamic brake; engage it only after the rod stops.
At 0.5 MPa, the drive force is 6136N push and 5734N pull. At the 0.7 MPa ceiling, push is 8590N, yielding a maximum 876 kgf drive force. Separately, the static holding force of the lock is 8600N.
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