Airtac BSAI Locking Clamp Cylinder BSAI80X50
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X50 is a genuine double-acting ISO 15552 cylinder with a Ø80mm 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 3600 N.
- BoreØ80 mm
- Stroke50 mm
- Cylinder portG3/8
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM20×1.5
About the Airtac BSAI Locking Clamp Cylinder BSAI80X50
The AirTAC BSAI80X50 is a double-acting ISO 15552 profile cylinder featuring a built-in clamp-lock mechanism. A spring-applied, air-released gripper secures the 25 mm carbon steel piston rod at any position along its 50 mm stroke, delivering a static holding force of 3600 N. Operating at 0.15-0.7 MPa, it generates 2513 N of thrust at 0.5 MPa. Remember that holding force and thrust are distinct: you must size the 3600 N clamp against your static load, not the cylinder's thrust.
The clamp is bidirectional and engages only after the rod has stopped, meaning it cannot brake a moving load. Unlocking requires balanced air pressure on both sides of the piston via the dedicated G1/8 enclasp port to prevent the rod from jumping abruptly. The variable air cushion at the stroke ends only decelerates the piston; the clamp itself is what holds the load. This extruded aluminum barrel design is dimensionally interchangeable with ISO 15552 mounting interfaces.
Airtac BSAI Locking Clamp Cylinder BSAI80X50 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X50 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 50 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G3/8 |
| Rod thread | M20×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 3600 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 (Ø80 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa (max) | 3519 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (3600 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI80X50 Is Used
Vertical Load Holding
Locks a lifted workpiece securely at any mid-stroke position on vertical axes, preventing falls during operation pauses.
Power Loss Safety
Spring-applied clamp engages automatically upon air loss, holding the 3600 N load firmly wherever the rod stopped.
Machining Position Hold
Secures the part rigidly during drilling or inspection processes without relying on continuous pneumatic pressure.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X50 the Right Clamp-Lock?
Choose this 80 mm bore when a load needs secure intermediate holding that a plain SAI cylinder or a SAIL stroke-end-only lock cannot provide. If your application requires less force, the 63 mm bore offers 1559 N thrust at 0.5 MPa and a 2200 N holding force. If you need higher clamping, the 100 mm bore provides 3927 N thrust and 5500 N holding force. The 25 mm rod and M20x1.5 thread provide excellent rigidity and side-load resistance.
For replacement, verify the 80 mm bore, 50 mm stroke, PT tapered port threads, and the 3/8 cylinder port. The single-rod BSAI accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. Because no magnet is specified, position sensing via CMSE reed or DMSE electronic switches is not available without modification. Always ensure the cylinder has stopped before engaging the clamp, and add an independent safety measure for human safety-critical applications.
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 BSAI80X50 FAQ
The BSAI80X50 provides a static holding force of 3600 N. The clamp locks the rod at any position bidirectionally, but only after the cylinder has stopped moving.
The clamp is released by applying air to the dedicated G1/8 enclasp port, but only after the air pressures on both sides of the piston are balanced. If pressures are unbalanced, the rod can jump abruptly upon release.
Related AirTAC Lock & Standard Cylinders
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