Airtac BSAI Locking Clamp Cylinder BSAI80X400S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X400S is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 400mm 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
- Stroke400 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 BSAI80X400S
The AirTAC BSAI80X400-S is a double-acting ISO 15552 profile cylinder featuring a built-in clamp-lock mechanism. A spring-applied, air-released gripper clamps the 25 mm carbon steel rod to hold the load securely at ANY position along the 400 mm stroke, delivering a static holding force of 3600 N. Operating at 0.15-0.7 MPa, it provides 2513 N of push thrust and 2268 N of pull thrust at 0.5 MPa. The -S magnet enables position sensing with CMSE reed or DMSE electronic switches.
It is crucial to distinguish the 3600 N static holding force from the cylinder thrust; the clamp sustains the load independently of air pressure, whereas thrust drives the movement. The variable air cushion at both ends only decelerates the piston near stroke ends and does not hold the load. This enclasp mechanism requires a third G1/8 unlock port and must be released with balanced piston pressures to prevent the rod from jumping abruptly.
Airtac BSAI Locking Clamp Cylinder BSAI80X400S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X400S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 400 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 BSAI80X400S Is Used
Vertical Axis Holding
Secures elevated loads at any point along the vertical travel, preventing drops when air pressure is removed.
Emergency Stop Safety
Maintains position during a sudden power loss, holding the workpiece steady until pressure is restored.
Machining Position Hold
Locks the rod rigidly for machining or inspection tasks, ensuring the workpiece does not shift under force.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X400S the Right Clamp-Lock?
Choose this 80 mm bore if your application requires holding a heavy load mid-stroke without maintaining live air pressure, a capability where it surpasses the SAIL series that only locks at stroke ends. If your system does not require intermediate holding, a plain SAI cylinder suffices. To step down, a 63 mm bore offers 1559 N thrust at 0.5 MPa and a 2200 N holding force; stepping up to 100 mm yields 3927 N thrust and 5500 N holding force.
Because the 400 mm stroke is long, external guidance is recommended to manage side loads despite the robust M20x1.5 rod thread. The clamp locks only after the rod has stopped and cannot brake a moving load; safety-critical applications need an independent safety measure. This PT-ported single-rod model accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts.
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 BSAI80X400S FAQ
It provides a static holding force of 3600 N. The spring-applied clamp locks bidirectionally at any position along the 400 mm stroke, but only after the piston has stopped moving.
The clamp uses a G1/8 port to release via air pressure. You must balance the air pressures on both sides of the piston before unlocking, or the rod may jump abruptly. It is not a braking device for moving loads.
Related AirTAC Lock & Standard Cylinders
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