Airtac BSAI Locking Clamp Cylinder BSAI40X80S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI40X80S is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 80mm 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
- Stroke80 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 BSAI40X80S
The AirTAC BSAI40X80-S is a double-acting ISO 15552 profile cylinder with a built-in enclasp mechanism. A spring-applied, air-released gripper clamps the 16mm carbon steel rod to hold the load at any position along the 80mm stroke, delivering a 900N static holding force. The base cylinder generates 628N push thrust at 0.5MPa (879N at 0.7MPa). You must size the holding force against your static load, as the 900N clamp capacity is a separate quantity from the 628N cylinder thrust.
This model includes a -S magnet for position sensing via AirTAC CMSE reed or DMSE solid-state switches fitted into the dual-side sensor grooves. The clamp operates via a dedicated G1/8 enclasp port, separate from the 1/4 PT cylinder ports. Remember that the variable air cushion only decelerates the piston near stroke ends; the mechanical clamp is what actually secures the load.
Airtac BSAI Locking Clamp Cylinder BSAI40X80S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI40X80S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 BSAI40X80S Is Used
Vertical Axis Holding
Prevents gravity-driven drops on vertical actuators by clamping the rod securely at any mid-stroke position during a power loss.
Machining Position Lock
Freezes the workpiece at a specific intermediate travel point for machining or inspection without relying on end-of-stroke stops.
Emergency Safety Stop
Holds the load safely in place anywhere along the 80mm stroke when air pressure drops, provided the rod has already stopped.
Is the Airtac BSAI Locking Clamp Cylinder BSAI40X80S the Right Clamp-Lock?
Choose this 40mm bore when a 900N hold is required but the 32mm bore's 600N capacity is insufficient. If your load exceeds 900N, step up to the 50mm bore (1400N hold, 982N thrust). Select the BSAI clamp-lock over a SAIL model when you need to secure the rod mid-stroke rather than only at the end. A plain SAI cylinder suffices if no static holding is needed. For safety, the clamp locks only after the rod stops, and it must be unlocked with balanced air pressures to prevent the rod from jumping abruptly. Safety-critical applications require an additional independent measure.
This BSAI40X80-S replacement matches single-rod, 40mm bore, 80mm stroke, PT ports, and a -S magnet. It accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, or TCM2 mounts. The M12x1.25 rod thread and 16mm rod diameter handle side loads well, though external guides are recommended for unsupported 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 BSAI40X80S FAQ
The clamp-lock provides a static holding force of 900N. It engages a spring-applied gripper on the rod to hold the load securely at any position along the stroke, operating bidirectionally.
The clamp locks only after the cylinder has stopped, meaning it cannot brake a moving rod. To unlock it safely, air pressures on both sides of the piston must be balanced via the G1/8 port, or the rod may move abruptly. Human-safety loads require an independent backup measure.
Related AirTAC Lock & Standard Cylinders
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