Airtac BSAI Locking Clamp Cylinder BSAI80X300
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X300 is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 300mm 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
- Stroke300 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 BSAI80X300
The AirTAC BSAI80X300 is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock mechanism. It secures the carbon steel piston rod at any position along its 300 mm travel, delivering a static holding force of 3600 N. The cylinder generates 2513 N of push thrust at 0.5 MPa, but remember that holding force and thrust are distinct quantities: you must size the 3600 N clamp rating against your static load, not the cylinder thrust.
This unit operates at 0.15-0.7 MPa and requires a third G1/8 enclasp port to release the brake. The clamp locks only after the rod has stopped; it cannot brake a moving load. Furthermore, the variable air cushions at stroke ends only decelerate the piston, while the clamp provides the actual holding power. The rod must be unlocked with balanced air pressures to prevent abrupt movement upon release.
Airtac BSAI Locking Clamp Cylinder BSAI80X300 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X300 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 300 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 BSAI80X300 Is Used
Vertical Axis Holding
Secures a 300 mm vertical lift at any intermediate height with 3600 N of holding force, preventing gravity-driven drops during operation.
Emergency Power Loss Hold
The spring-applied clamp engages automatically anywhere in the stroke when air pressure drops, safely freezing the load in place.
Machining Position Lock
Locks the carbon steel rod rigidly after the cylinder stops, providing a stable 2513 N thrust workpiece position for inspection or machining.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X300 the Right Clamp-Lock?
Choose this 80 mm bore when a 50 mm bore (1400 N holding force, 982 N thrust at 0.5 MPa) cannot safely hold your load, or step down to a 63 mm bore (2200 N holding force) for lighter duties. Select the BSAI clamp-lock over a SAIL model when you need to secure the load at any intermediate stroke position, rather than only at the end of travel. If no mid-stroke holding is required, a plain SAI cylinder suffices.
For safety-critical applications, note that this clamp locks only after the cylinder stops and requires balanced piston pressures to unlock safely. As a replacement, match the single-rod configuration, 80 mm bore, 300 mm stroke, PT tapered ports, and the BSAI mounting set (Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, TCM2). Because the stroke is 300 mm, the 25 mm rod and M20x1.5 thread provide good side-load capacity, but an external guide is recommended for unsupported lengths. This non-magnet version does not support CMSE or DMSE sensors.
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 BSAI80X300 FAQ
The BSAI80X300 features a static clamp holding force of 3600 N. This bidirectional clamp locks the rod at any position along the 300 mm stroke, but it only engages after the cylinder has stopped moving.
The clamp is not a braking device for a moving rod. It must be unlocked by applying balanced air pressures to both sides of the piston via the G1/8 enclasp port; otherwise, the rod may jump abruptly. Human-safety applications require an additional independent safety measure.
Related AirTAC Lock & Standard Cylinders
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