Airtac BSAI Locking Clamp Cylinder BSAI80X75
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X75 is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 75mm 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
- Stroke75 mm
- Cylinder portG3/8
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM20×1.5
- 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 BSAI80X75
The AirTAC BSAI80X75 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock that secures the piston rod at any position along its 75 mm stroke. It delivers a static holding force of 3600 N, while the cylinder itself generates 2513 N of push thrust at 0.5 MPa (3518 N at 0.7 MPa). You must size the holding force against your static load, as the clamp capacity and the pneumatic thrust are two entirely separate quantities.
This mechanism locks bidirectionally once the rod has stopped, meaning it cannot brake a moving load. A third G1/8 enclasp port releases the lock when air is applied, but you must balance the pressures on both sides of the piston before unlocking to prevent the rod from jumping abruptly. The variable air cushion at the stroke ends only decelerates the piston; it is the mechanical clamp that actually holds the load in place.
Airtac BSAI Locking Clamp Cylinder BSAI80X75 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X75 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 75 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 BSAI80X75 Is Used
Vertical Axis Holding
Secures heavy vertical payloads at any intermediate height without relying on continuous air pressure, utilizing the 3600 N static holding force.
Emergency Drop Prevention
Engages automatically upon loss of air pressure to clamp the rod in place, though an independent safety measure is required for human safety.
Machining Position Lock
Freezes the rod at a specific intermediate stroke length for precise machining or inspection tasks where end-of-stroke holding is inadequate.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X75 the Right Clamp-Lock?
Choose this 80 mm bore when an application requires substantial mid-stroke positioning, stepping up from a 63 mm bore that offers 1559 N thrust and 2200 N holding force. If you only need to hold a load at the fully extended or retracted stroke end, a plain SAIL stroke-end lock or a standard SAI cylinder without a lock is sufficient. For safety-critical vertical loads, note that this clamp locks only after the cylinder stops and requires an additional independent safety measure.
To replace this unit, match the single-rod configuration, 80 mm bore, 75 mm stroke, and PT tapered ports (cylinder port 3/8, enclasp port G1/8). It accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. Because this unit lacks the -S magnet option, it cannot host CMSE or DMSE sensors. The M20x1.5 rod thread and 25 mm rod diameter provide robust side-load resistance for heavy tooling.
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 BSAI80X75 FAQ
The BSAI80X75 provides a static holding force of 3600 N. Unlike a SAIL cylinder that only holds at stroke ends, this clamp-lock mechanism secures the rod at any position along the stroke, but only after the rod has completely stopped moving.
The clamp is spring-applied and air-released via a separate G1/8 port. You must balance the air pressure on both sides of the piston before unlocking; otherwise, the rod can move abruptly. It cannot be used to brake a moving rod.
Related AirTAC Lock & Standard Cylinders
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