Airtac BSAI Locking Clamp Cylinder BSAI80X75S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X75S is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 75mm 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
- Stroke75 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 BSAI80X75S
The AirTAC BSAI80X75-S is a double-acting ISO 15552 profile cylinder with a built-in spring-applied, air-released clamp-lock. It secures the carbon steel piston rod at any position along its 75mm travel, delivering a static holding force of 3600 N. Because it is an -S variant, it includes a magnet for precise position sensing with AirTAC CMSE reed and DMSE electronic switches. The 80mm bore generates 2513 N of thrust at 0.5 MPa, but the holding force and thrust are distinct quantities; you must size the 3600 N clamp capacity against your static load, not the pneumatic push force.
This enclasp mechanism is bidirectional, gripping securely whether the rod was extending or retracting. It is crucial to understand that the variable air cushion only decelerates the piston near the stroke end; the clamp is what actually holds the load. The clamp operates via a dedicated G1/8 enclasp port, separate from the 3/8 cylinder ports, and functions within a 0.15-0.7 MPa operating pressure range. The lock engages only after the rod has completely stopped, meaning it cannot brake a moving load.
Airtac BSAI Locking Clamp Cylinder BSAI80X75S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X75S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 75 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 BSAI80X75S Is Used
Vertical Axis Hold
Locks a 80mm bore vertical load at any intermediate height with 3600 N of holding force, preventing gravity-driven drops during operation.
Power Loss Safety
The spring-applied clamp engages automatically upon air loss, freezing the rod exactly where it stopped to secure the workpiece mid-stroke.
Machining Position Hold
Provides rigid mid-stroke positioning for machining or inspection tasks, keeping the carbon steel rod clamped bidirectionally against cutting forces.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X75S the Right Clamp-Lock?
Step down to a 63mm bore if your application only requires 1559 N thrust at 0.5 MPa and a 2200 N holding capacity, or step up to a 100mm bore for 3927 N thrust and 5500 N holding force. Choose this BSAI model over a SAIL cylinder when you need to lock at any position rather than just at the stroke end. A plain SAI cylinder suffices if you only need standard pneumatic motion without any holding capability. Always ensure the rod has stopped before applying the clamp, and balance the air pressures on both sides of the piston before unlocking to prevent the rod from jumping abruptly. For safety-critical human loads, install an additional independent mechanical safety measure.
This 80mm bore features a 25mm rod with an M20x1.5 thread, providing robust side-load resistance. It accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. Ensure you order the PT port thread configuration and the -S magnet option for CMSE/DMSE sensor compatibility.
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 BSAI80X75S FAQ
The clamp-lock provides a static holding force of 3600 N. It is a spring-applied, air-released mechanism that locks the rod at any position along the stroke, operating bidirectionally to secure the load whether the rod was extending or retracting.
The clamp locks only after the cylinder has stopped; it cannot brake a moving rod. To unlock it safely, you must balance the air pressures on both sides of the piston via the G1/8 enclasp port, otherwise the rod may jump abruptly. Safety-critical loads require an additional independent safety measure.
Related AirTAC Lock & Standard Cylinders
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