Airtac BSAI Locking Clamp Cylinder BSAI80X700S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X700S is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 700mm 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
- Stroke700 mm
- Cylinder portG3/8
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM20×1.5
About the Airtac BSAI Locking Clamp Cylinder BSAI80X700S
The AirTAC BSAI80X700-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock mechanism. A defining trait of this series is the ability to lock the piston rod at ANY position along its 700 mm travel, providing a robust static holding force of 3600 N. Because it is a single-rod design, the forward thrust reaches 2513 N at 0.5 MPa (3518 N at the 0.7 MPa maximum). It is crucial to distinguish this 3600 N holding force from the cylinder's thrust; you must size the clamp capacity against your static load weight, not the pneumatic push force.
This model includes a -S magnet for position sensing via AirTAC CMSE (reed) and DMSE (electronic) switches fitted into the dual sensor grooves. The enclasp mechanism relies on a separate G1/8 unlock port, requiring 0.15-0.7 MPa to release the spring tension. Remember that the variable air cushions only decelerate the piston near the stroke ends; the mechanical clamp is the sole device responsible for securing the load. Operating pressure spans 0.15-0.7 MPa, and the speed range is 30-800 mm/s.
Airtac BSAI Locking Clamp Cylinder BSAI80X700S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X700S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 700 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 BSAI80X700S Is Used
Vertical Axis Mid-Stroke Hold
Secures a 700 mm vertical lift at any intermediate height without relying on continuous air pressure, utilizing the 3600 N static clamp to prevent gravity-induced drops.
Emergency Power Loss Hold
Engages instantly upon air loss to freeze the rod exactly where it stopped, protecting processes and tooling from sudden collapses during an outage.
Machining Position Lock
Locks the workpiece firmly in a specific location for secondary machining or inspection, ensuring the 2513 N thrust axis remains perfectly rigid during the operation.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X700S the Right Clamp-Lock?
Choose this 80 mm bore when an application demands substantial mid-stroke holding that a SAIL model cannot provide, as SAIL only grips at stroke extremes. If your load is lighter, stepping down to the 63 mm bore offers 1402 N thrust at 0.5 MPa and a 2200 N holding force. For heavier suspended loads, the 100 mm bore provides 3927 N thrust and a 5500 N hold. At 700 mm of stroke, the 25 mm rod and M20x1.5 thread provide excellent structural rigidity, but an external guide rail is highly recommended to prevent excessive side-loading on the long unsupported span.
When specifying a replacement, match the single-rod configuration, 80 mm bore, 700 mm stroke, and PT port threads. The mounting set for this single-rod variant includes Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2. Safety dictates that the clamp locks only after the cylinder has stopped; it cannot brake a moving rod. Furthermore, it must be unlocked with balanced pressures on both sides of the piston, or the rod may jump abruptly. Human-safety applications require an independent secondary safety measure.
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 BSAI80X700S FAQ
The BSAI80X700-S features a static holding force of 3600 N. The spring-applied clamp locks the rod at any position along the 700 mm stroke, but this holding capacity is separate from the cylinder's 2513 N thrust at 0.5 MPa and only engages after the rod has stopped moving.
The clamp uses a G1/8 enclasp port and requires balanced air pressure on both sides of the piston to unlock safely. If pressures are not balanced, the rod can move abruptly upon release. It is not a braking device for a moving rod, so safety-critical applications need an independent external safety measure.
Related AirTAC Lock & Standard Cylinders
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