Airtac BSAI Locking Clamp Cylinder BSAI80X25
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X25 is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 25mm 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
- Stroke25 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 BSAI80X25
The AirTAC BSAI80X25 is a double-acting ISO 15552 profile cylinder featuring a built-in spring-applied, air-released clamp-lock. It secures the 25mm carbon steel rod at any position along its 25mm travel, delivering a static holding force of 3600 N. The bidirectional grip holds loads reliably whether the rod was extending or retracting. Operating pressure spans 0.15-0.7 MPa, generating 2513 N of push thrust at 0.5 MPa.
Crucially, the 3600 N holding force is a separate metric from the 2513 N thrust; you must size the clamp capacity against the static load, not the cylinder's movement force. Remember that the variable air cushion only decelerates the piston near stroke ends, while the actual load holding is performed exclusively by the clamp mechanism. Furthermore, unlocking requires balanced air pressure on both piston sides via the dedicated G1/8 enclasp port to prevent abrupt rod jumps.
Airtac BSAI Locking Clamp Cylinder BSAI80X25 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X25 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 25 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 BSAI80X25 Is Used
Vertical Axis Hold
Prevents gravity-driven drops on vertical lifts by clamping the rod securely at any intermediate height during operation.
Power Loss Safety
Maintains the exact rod position instantly if air pressure drops, securing the load without relying on live pneumatic thrust.
Machining Position Lock
Freezes the workpiece at a specific intermediate stroke point for precise milling or inspection without drift.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X25 the Right Clamp-Lock?
Choose this 80mm bore when an application demands intermediate position holding that a SAIL stroke-end lock cannot provide. If the 25mm stroke is insufficient but the 3600 N hold is required, keep the bore and extend the stroke. If less holding force is acceptable, step down to the 63mm bore, which provides 1402 N pull thrust at 0.5 MPa and a 2200 N clamp hold. For simple end-of-stroke positioning without intermediate stops, a plain SAI cylinder suffices.
This model uses PT tapered port threading, a 3/8 cylinder port, and a separate G1/8 enclasp port. It accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. Since no magnet is specified, it cannot use CMSE or DMSE sensors. Always ensure the cylinder has completely stopped before engaging the clamp, as it cannot brake a moving rod, and add independent safety measures for human-safety-critical holds.
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 BSAI80X25 FAQ
The clamp-lock provides a static holding force of 3600 N. It engages a spring-applied gripper to hold the rod at any position along the stroke, but only after the cylinder has stopped moving.
The clamp is released by applying air pressure 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 unlocking.
Related AirTAC Lock & Standard Cylinders
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