Airtac BSAI Locking Clamp Cylinder BSAI80X25S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X25S 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 BSAI80X25S
The AirTAC BSAI80X25-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock. It grips the 25mm carbon steel rod to secure the load at any point along its 25mm travel, delivering a static holding force of 3600 N. The bidirectional clamp engages in both extension and retraction directions, while the integrated -S magnet enables position tracking via CMSE reed or DMSE electronic solid-state sensors.
It is crucial to distinguish this 3600 N holding force from the cylinder's thrust, which peaks at 3518 N at 0.7 MPa; the clamp secures the static load, whereas thrust drives movement. Furthermore, the variable air cushion only decelerates the piston near stroke ends, while the actual load holding is performed by the clamp. Unlocking requires balanced air pressure across the piston via the G1/8 enclasp port to prevent abrupt rod jumps.
Airtac BSAI Locking Clamp Cylinder BSAI80X25S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X25S |
|---|---|
| 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 BSAI80X25S Is Used
Vertical Load Holding
Secures elevated masses at any intermediate height during power loss, preventing gravity-driven drops.
Machining Position Lock
Freezes the workpiece at a precise non-end location for secure milling or drilling operations.
Emergency Safety Stop
Holds the mechanism instantly upon air loss, serving as a fail-safe clamp for halted equipment.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X25S the Right Clamp-Lock?
Choose this 80mm bore when an application demands high load security mid-stroke, stepping up from a 63mm bore that offers 1559 N thrust at 0.5 MPa and 2200 N holding force. If safety only requires holding at the stroke end, a plain SAIL cylinder suffices, but the BSAI is necessary for locking anywhere in transit. The clamp locks only after the rod stops, so human-safety applications need an independent external brake.
This single-rod configuration accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. It features PT tapered ports, a 3/8 cylinder port, and a 20mm rod thread. The robust 25mm rod handles higher side loads, though the 25mm stroke is short enough to not require an external guide.
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 BSAI80X25S FAQ
The clamp-lock provides a static holding force of 3600 N. It is bidirectional and can hold the load at any position along the stroke, not just at the end caps.
The clamp unlocks only when air pressure is balanced on both sides of the piston via the G1/8 enclasp port. The rod must be completely stopped before unlocking to prevent abrupt movement, as the clamp cannot brake a moving rod.
Related AirTAC Lock & Standard Cylinders
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