Airtac BSAI Locking Clamp Cylinder BSAI50X150S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X150S is a genuine double-acting ISO 15552 cylinder with a Ø50mm 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 1400 N.
- BoreØ50 mm
- Stroke150 mm
- Cylinder portG1/4
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM16×1.5
- 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 BSAI50X150S
The AirTAC BSAI50X150-S is a double-acting ISO 15552 profile cylinder featuring a built-in spring-applied, air-released clamp-lock. It provides a static holding force of 1400 N and can secure the load at any position along its 150 mm travel. Delivering 982 N of thrust at 0.5 MPa (1374 N at 0.7 MPa), it features a carbon steel rod and a PT tapered port thread. Remember that holding force and thrust are distinct quantities; you must size the 1400 N clamp capacity against your static load, not the cylinder thrust.
Unlike standard air cushions that only decelerate the piston near stroke end, this mechanical clamp physically grips the rod. It is bidirectional, locking whether the rod was extending or retracting, but it only engages after the cylinder has stopped and cannot brake a moving rod. The enclasp mechanism uses a separate G1/8 port, and unlocking requires balanced air pressure on both sides of the piston to prevent the rod from jumping abruptly. This -S variant includes a magnet for precise position sensing with AirTAC CMSE reed or DMSE electronic switches.
Airtac BSAI Locking Clamp Cylinder BSAI50X150S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X150S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 150 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G1/4 |
| Rod thread | M16×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 1400 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 1000 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 (Ø50 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa (max) | 1374 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (1400 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI50X150S Is Used
Vertical Axis Holding
Secures a lifted payload at any intermediate height on a vertical Z-axis, preventing a drop if air pressure is lost mid-stroke.
Power Failure Safety
Acts as an emergency enclasp to freeze the rod instantly upon pneumatic or electrical power loss, safely holding the 1400 N load.
Machining Position Hold
Locks the workpiece firmly in place during drilling or milling operations, absorbing process vibrations without relying on live air pressure.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X150S the Right Clamp-Lock?
Choose this 50 mm bore model for mid-range load holding; step down to a 40 mm bore (528 N thrust, 900 N hold) for lighter duties, or up to a 63 mm bore (1559 N thrust, 2200 N hold) for heavier static loads. Select this BSAI clamp-lock over a SAIL cylinder when you need to secure the rod at any point in the stroke rather than just at the end. If you only need standard movement without intermediate holding, a plain SAI cylinder suffices.
For safe operation, note that the clamp locks only after the rod stops and must be released with balanced pressures. Safety-critical applications require an independent backup measure. Ensure your replacement matches the 50 mm bore, 150 mm stroke, PT port, single rod, and the BSAI mounting set (Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, TCM2). The 20 mm rod and M16x1.5 thread offer good side-load capacity, though strokes of 300 mm or more require an external guide.
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 BSAI50X150S FAQ
The clamp provides a static holding force of 1400 N at any position. However, it is not a dynamic brake; it only locks after the cylinder has come to a complete stop.
The clamp is released via a G1/8 enclasp port, but only when air pressures on both sides of the piston are balanced to prevent the rod from jumping. The -S magnet works with AirTAC CMSE reed and DMSE electronic sensors.
Related AirTAC Lock & Standard Cylinders
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