Airtac BSAI Locking Clamp Cylinder BSAI50X80
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X80 is a genuine double-acting ISO 15552 cylinder with a Ø50mm 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 1400 N.
- BoreØ50 mm
- Stroke80 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 BSAI50X80
The AirTAC BSAI50X80 is a double-acting ISO 15552 profile cylinder featuring a built-in spring-applied, air-released clamp-lock mechanism. It delivers 982 N of thrust at 0.5 MPa, but the defining feature is its ability to hold a static load at any position along its 80 mm stroke with a dedicated holding force of 1400 N. You must size the clamp's holding capacity against your static load, as this holding force is a separate quantity from the cylinder's standard push thrust.
This bidirectional enclasp locks the carbon steel piston rod securely once motion has stopped, but it cannot brake a moving load. A third G1/8 enclasp port supplies the unlock pressure, and the system operates within a 0.15-0.7 MPa range. The variable air cushions at both ends only serve to decelerate the piston near stroke limits; the clamp itself is the sole device responsible for maintaining the hold.
Airtac BSAI Locking Clamp Cylinder BSAI50X80 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X80 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 80 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 BSAI50X80 Is Used
Vertical Axis Holding
Prevents gravity-driven drops on vertical strokes by clamping the rod securely at any intermediate position during a power loss event.
Machining Position Lock
Secures a workpiece firmly in place during drilling or milling operations, holding the load without relying on continuous live air pressure.
Emergency Stop Hold
Maintains the exact rod position when an emergency stop is triggered, provided the piston has ceased moving before the clamp engages.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X80 the Right Clamp-Lock?
Choose this 50 mm bore when an application requires mid-stroke holding that a plain SAI cannot provide, or when a SAIL stroke-end-only lock is insufficient. If you need less holding capacity, stepping down to a 40 mm bore provides 900 N of holding force and 628 N of thrust at 0.5 MPa. If your load requires a stronger grip, the 63 mm bore offers 2200 N of holding force alongside 1559 N of thrust.
This model features a PT tapered port thread and accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. Because no -S magnet is specified, it will not support CMSE or DMSE sensors without modification. Always ensure the cylinder has completely stopped before engaging the clamp, and unlock only with balanced piston pressures to prevent the rod from jumping. For safety-critical loads, an independent external safety measure is required.
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 BSAI50X80 FAQ
The clamp-lock provides a static holding force of 1400 N. This is entirely separate from the 982 N cylinder thrust at 0.5 MPa, and it can hold the load at any position along the stroke once the rod has stopped moving.
The clamp is spring-applied and air-released via a third G1/8 enclasp port. It must only be unlocked after the cylinder has stopped and the air pressures on both sides of the piston are balanced; otherwise, the rod may move abruptly. It cannot brake a moving rod.
Related AirTAC Lock & Standard Cylinders
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