Airtac BSAI Locking Clamp Cylinder BSAI80X250
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X250 is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 250mm 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
- Stroke250 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 BSAI80X250
The AirTAC BSAI80X250 is a double-acting ISO 15552 profile cylinder equipped with a built-in clamp-lock mechanism. A spring-applied, air-released gripper clamps the 25 mm carbon steel piston rod, providing a static holding force of 3600 N at any position along the 250 mm stroke. It is crucial to distinguish this holding force from the cylinder's thrust; the 3600 N clamp rating secures the static load independently of the 2513 N push thrust generated at 0.5 MPa. The base extruded aluminum barrel is dimensionally interchangeable with ISO 15552 mounting interfaces.
This enclasp unit requires a third G1/8 unlock port alongside the 3/8 cylinder ports. Remember that the variable air cushions at stroke ends only decelerate the piston; they do not hold the load. The clamp itself is bidirectional, locking the rod whether it was extending or retracting, but it functions strictly as a static lock that engages only after the cylinder has stopped moving.
Airtac BSAI Locking Clamp Cylinder BSAI80X250 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X250 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 250 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 BSAI80X250 Is Used
Vertical Axis Holding
Locks a 25 mm rod at any point in the 250 mm travel to prevent gravity-driven drops on vertical lifts during power loss.
Machining Position Lock
Secures a workpiece carriage mid-stroke for machining or inspection, ensuring the load is rigidly held with 3600 N of force.
Mid-Stroke Safety Stop
Holds a stopped load securely anywhere along the stroke as an emergency hold, though it cannot brake a moving rod.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X250 the Right Clamp-Lock?
Choose this 80 mm bore model when an application demands mid-stroke load holding that a plain SAI cylinder cannot provide, or when a SAIL end-lock is insufficient because the load must be secured mid-travel. If the load is lighter, stepping down to the 63 mm bore yields 1402 N pull thrust at 0.5 MPa and a 2200 N holding force. If the load is heavier, the 100 mm bore offers 3681 N thrust and a 5500 N hold. Always size the holding force to the static load, not the thrust. To unlock safely, the air pressures on both sides of the piston must be balanced, or the rod may jump abruptly; safety-critical applications require an additional independent mechanical stop. This single-rod variant accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. Standard PT tapered threads are used. Without a magnet, it will 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 BSAI80X250 FAQ
The clamp-lock provides a static holding force of 3600 N. It is a bidirectional, spring-applied gripper that locks the piston rod at any position along the 250 mm stroke, but only after the cylinder has completely stopped moving.
The clamp is released via air pressure through a separate G1/8 enclasp port. To prevent the rod from jumping abruptly, the air pressures on both sides of the piston must be balanced before unlocking. If human safety depends on the hold, an additional independent safety measure is required.
Related AirTAC Lock & Standard Cylinders
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