Airtac BSAI Locking Clamp Cylinder BSAI50X350
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X350 is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 350mm 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
- Stroke350 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 BSAI50X350
The AirTAC BSAI50X350 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock mechanism. It provides a static holding force of 1400 N and locks the carbon steel rod at any position along its 350 mm stroke. Delivering 982 N of thrust at 0.5 MPa, it is crucial to distinguish this holding force from the cylinder thrust: the clamp sustains the static load without live air pressure, whereas thrust dictates the movement capability.
This unit operates within a 0.15-0.7 MPa range and requires a third G1/8 enclasp port to release the gripper. The integrated variable air cushion decelerates the piston near stroke ends, but the clamp is the sole device responsible for securing the load. Furthermore, the clamp locks only after the rod has completely stopped; it cannot brake a moving actuator.
Airtac BSAI Locking Clamp Cylinder BSAI50X350 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X350 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 350 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 BSAI50X350 Is Used
Vertical Axis Holding
Secures a 350 mm vertical lift at any intermediate height using 1400 N of holding force, preventing gravity drops during air loss.
Emergency Power Loss Hold
Spring-applied clamp engages instantly upon pressure loss to freeze the rod mid-stroke, protecting operators and workpieces.
Mid-Stroke Machining Stop
Locks the carbon steel rod securely at a specific intermediate position for drilling or inspection without cycling to the end.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X350 the Right Clamp-Lock?
Select this 50 mm bore when an application demands 982 N of thrust at 0.5 MPa alongside a 1400 N static hold at varying mid-strokes. If your process only requires holding at the stroke end, a SAIL cylinder suffices, but choose the BSAI50X350 for multi-position locking. For lighter loads, the 40 mm bore offers 628 N thrust and 900 N holding force. Note that the clamp is not a dynamic brake; it engages after the rod stops, and unlocking requires balanced piston pressures to prevent abrupt rod jumping.
This single-rod configuration uses a PT 1/4 cylinder port and accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. Because the 350 mm stroke is substantial, the 20 mm rod and M16x1.5 thread provide rigidity, but an external guide is recommended to manage side loads. It arrives without a magnet; add the -S option for CMSE reed or DMSE electronic solid-state sensing.
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 BSAI50X350 FAQ
The BSAI50X350 provides a static holding force of 1400 N. The clamp is bidirectional and locks the rod at any position along the 350 mm stroke, holding the load securely without requiring continuous air pressure.
The clamp locks only after the cylinder has stopped; it cannot brake a moving rod. To unlock it safely, the air pressures on both sides of the piston must be balanced, otherwise the rod may move abruptly. For safety-critical applications, an additional independent safety measure is required.
Related AirTAC Lock & Standard Cylinders
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