Airtac BSE Clamp Standard Cylinder BSE125X300S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE125X300S 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, 300mm stroke, PT1/2 cylinder ports, G1/8 lock-release port.
- BoreØ125 mm
- Stroke300 mm
- Static holding force8600 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE125X300S
The AirTAC BSE125X300S is a double-acting ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. It delivers 8590 N push force at 0.7 MPa while providing a massive 8600 N bidirectional static holding force with zero live air.
This fail-safe collet locks the 32 mm rod instantly if air is exhausted or an E-stop trips. A dedicated G1/8 release port unlocks the mechanism only after both piston sides are pressure-balanced, requiring at least 0.5 seconds before moving. The cylinder runs at 0.15-0.7 MPa and includes a -S magnet for DMSE electronic or CMSE reed sensors.
Rod Lock — 8600 N Static Holding (Ø125mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE125X300S 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 BSE125X300S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE125X300S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 300 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 BSE125X300S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 125 | 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 BSE125X300S Is Used
Heavy Vertical Lift Press
Holds an 8600 N vertical press platen securely in place during an air pressure loss event, preventing a catastrophic free-fall.
Large Injection Mold Tooling
Clamps heavy 876 kgf mold halves using the collet lock, ensuring the tooling stays fixed during an emergency stop without needing live air.
Pallet Stop Gate
Secures a 125 mm automated stop gate in the extended position, locking instantly via the fail-safe collet when the system exhausts.
Is the Airtac BSE Clamp Standard Cylinder BSE125X300S the Right Cylinder?
Verify your suspended load stays below the 8600 N static holding limit. If you need less force, stepping down to the 100 mm bore yields 3927 N push at 0.5 MPa and 5500 N hold; if you need more drive power, this 125 mm bore is the largest available, delivering 6136 N push at 0.5 MPa. For replacements, match the 300 mm stroke, PT1/2 port, and your specific mounting code. Because the stroke is 300 mm, use a guide rail to prevent side-load damage to the 32 mm rod. Engage the lock only after the rod fully stops, and release it only when pressures balance.
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 BSE125X300S FAQ
The BSE125X300S delivers 6136 N push and 5734 N pull at 0.5 MPa, and 8590 N push at 0.7 MPa (max 876 kgf drive force). The integrated rod lock provides a separate 8600 N bidirectional static holding force with no live air.
The spring-applied collet clamps the rod instantly on air loss or E-stop, holding the load in both directions up to 8600 N. To release, supply air to the G1/8 release port, ensure both piston sides are pressure-balanced, and wait at least 0.5 seconds before moving.
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