Airtac BSAI Locking Clamp Cylinder BSAI50X50S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X50S is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 50mm 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
- Stroke50 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 BSAI50X50S
The AirTAC BSAI50X50-S is a double-acting ISO 15552 profile cylinder with a built-in spring-applied, air-released clamp-lock. It secures the 20mm carbon steel rod at any position along its 50mm stroke, delivering a static holding force of 1400 N. The base cylinder generates 982 N of thrust at 0.5 MPa, but the holding force is a separate mechanical quantity sized against your static load, not the pneumatic thrust. This unit includes a -S magnet for position sensing.
A third G1/8 enclasp port supplies air to release the bidirectional grip. Remember that the variable air cushion only decelerates the piston near stroke end; the clamp itself is what holds the load. The lock engages strictly after the rod stops and cannot brake a moving rod. To prevent abrupt movement on release, the cylinder must be unlocked with balanced pressures on both sides of the piston.
Airtac BSAI Locking Clamp Cylinder BSAI50X50S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X50S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 50 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 BSAI50X50S Is Used
Vertical Axis Load Holding
Prevents a vertically raised workpiece from dropping when air pressure is removed, securing the load at any point along the 50mm travel.
Power Loss Emergency Stop
Spring-applied clamp engages instantly upon air loss to freeze the piston mid-stroke, providing a reliable mechanical hold during unexpected shutdowns.
Machining Position Hold
Locks the rod rigidly in place during a secondary machining or inspection process to prevent deflection from tool vibration.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X50S the Right Clamp-Lock?
Choose this 50mm bore if your load requires up to 1400 N of holding force and 982 N of thrust at 0.5 MPa. If your static load is lighter, a 40mm bore offers 900 N of holding force and 628 N of thrust; if heavier, stepping up to a 63mm bore provides 2200 N of holding force and 1559 N of thrust. Select this BSAI model over a SAIL cylinder when you need to lock at any position, rather than just at stroke end. If you only need standard movement without a hold, a plain SAI cylinder suffices.
For safe operation, the clamp locks only after the rod has stopped, so it is not a dynamic brake. Safety-critical applications require an additional independent safety measure. To release the lock safely, ensure the air pressures on both sides of the piston are balanced to prevent the rod from jumping. This replacement uses a single rod, 50mm stroke, PT port threads, and accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, or TCM2 mountings. The -S magnet works with AirTAC CMSE reed and DMSE electronic sensors.
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 BSAI50X50S FAQ
The clamp-lock provides a static holding force of 1400 N and is bidirectional, meaning it can secure the rod at any position along the stroke, whether the rod was extending or retracting.
The lock is not a dynamic brake; it only engages after the cylinder has stopped. To release it safely, air pressures on both sides of the piston must be balanced via the G1/8 enclasp port, otherwise the rod can move abruptly. For human safety, an independent external safety measure is required.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac BSAI Locking Clamp Cylinder BSAI50X50S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.