Airtac BSAI Locking Clamp Cylinder BSAI40X150S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI40X150S is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 150mm stroke and a spring-applied, air-released clamp-lock that holds the rod at ANY position along its travel — with a static holding force of 900 N.
- BoreØ40 mm
- Stroke150 mm
- Cylinder portG1/4
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM12×1.25
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac BSAI Locking Clamp Cylinder BSAI40X150S
The AirTAC BSAI40X150-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock mechanism. A defining feature of this series is its ability to lock the piston rod at any position along its 150mm stroke, providing a robust static holding force of 900 N. Because it includes the -S magnet option, it is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state sensors for precise end-position detection.
It is critical to distinguish this 900 N holding force from the cylinder's standard thrust; the clamp sustains static loads independently of the 628 N push thrust generated at 0.5 MPa, meaning you must size the clamp against the load weight, not the pneumatic force. The lock engages via a dedicated G1/8 enclasp port (separate from the 1/4 cylinder ports) and operates bidirectionally. Remember that the variable air cushions only decelerate the piston near stroke ends, while the clamp mechanism is the sole device responsible for securing the load.
Airtac BSAI Locking Clamp Cylinder BSAI40X150S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI40X150S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G1/4 |
| Rod thread | M12×1.25 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 900 N |
| Enclasp / unlock port | G1/8 |
| Operating pressure | 0.15 – 0.7 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Max stroke | Up to 800 mm |
Specifications follow the official AirTAC BSAI datasheet (ISO 15552). Operating pressure is 0.15–0.7 MPa (lower than a plain SAI). Port options: PT / G.
How the Clamp-Lock Holds
static holding force (Ø40 mm)
A spring-applied gripper clamps the rod and holds the load at any position in the stroke — not just at the stroke end (that is a SAIL) — and it is bidirectional: it holds whether the rod was extending or retracting.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa (max) | 880 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (900 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI40X150S Is Used
Vertical Axis Holding
Secures a 40mm bore lifting payload at any intermediate height along the 150mm stroke, preventing gravity drops during operation.
Emergency Drop Prevention
Engages automatically upon loss of air pressure to clamp the rod, providing a 900 N static safety hold wherever the piston stops.
Machining Position Lock
Freezes the workpiece at a precise non-end position for processing, ensuring the load remains entirely immovable without relying on live air pressure.
Is the Airtac BSAI Locking Clamp Cylinder BSAI40X150S the Right Clamp-Lock?
Choose this 40mm bore if your application demands a 900 N static hold at an intermediate stroke position, which a standard SAIL cylinder cannot provide since it only locks at stroke ends. If your load requires less holding power, the 32mm bore offers 600 N holding force and 402 N thrust at 0.5 MPa; conversely, stepping up to the 50mm bore provides 1400 N holding force and 982 N thrust. If no intermediate locking is required at all, a plain SAI cylinder suffices.
For safe operation, note that the clamp locks only after the rod has completely stopped, meaning it cannot function as a braking device for a moving load. Furthermore, the lock must be released by balancing the air pressures on both sides of the piston, or the rod may jump abruptly. When replacing a unit, match the single-rod configuration, 150mm stroke, PT port threads, and ensure you use the correct BSAI mounting set (Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, TCM2). The 16mm rod and M12x1.25 thread offer solid side-load resistance, though external guidance is recommended for heavy loads.
Quick checklist
- ✓ Hold needed at any position?
- ✓ Or stroke-end only → use SAIL
- ✓ Holding force ≥ your load
- ✓ Balanced-pressure unlock circuit
- ✓ Extra safety measure for people
Airtac BSAI Locking Clamp Cylinder BSAI40X150S FAQ
The BSAI40X150-S features a static holding force of 900 N. The spring-applied clamp can secure the rod at any position along the 150mm stroke, operating bidirectionally whether the rod was extending or retracting.
The clamp locks only after the cylinder has stopped and cannot brake a moving rod. To release it safely, air pressure must be balanced on both sides of the piston via the G1/8 enclasp port; otherwise, the rod may move abruptly. Safety-critical applications require an additional independent safety measure.
Related AirTAC Lock & Standard Cylinders
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