Airtac BSAI Locking Clamp Cylinder BSAI100X400
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI100X400 is a genuine double-acting ISO 15552 cylinder with a Ø100mm 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 5500 N.
- BoreØ100 mm
- Stroke400 mm
- Cylinder portG1/2
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM20×1.5
About the Airtac BSAI Locking Clamp Cylinder BSAI100X400
The AirTAC BSAI100X400 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock that grips the 25mm carbon steel rod to hold loads at ANY position along its 400mm stroke. It delivers a practical push thrust of 3927 N at 0.5 MPa (5497 N at 0.7 MPa), but the defining feature is its 5500 N static holding force. Buyers must distinguish between these two quantities: cylinder thrust moves the load, while the separate 5500 N clamp holding force resists the static load when air is removed.
This enclasp mechanism is bidirectional, securing the rod whether it was extending or retracting. It operates via a third G1/8 enclasp port, requiring 0.15-0.7 MPa to release the grip. The clamp is strictly a static hold; it locks only AFTER the cylinder has stopped and cannot brake a moving rod. Furthermore, the variable air cushion at the stroke ends only decelerates the piston before impact—it does not hold the load. The clamp itself provides the true position holding.
Airtac BSAI Locking Clamp Cylinder BSAI100X400 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI100X400 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø100 mm |
| Stroke | 400 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G1/2 |
| Rod thread | M20×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 5500 N |
| Enclasp / unlock port | G1/8 |
| Operating pressure | 0.15 – 0.7 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 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 (Ø100 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa (max) | 5498 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (5500 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI100X400 Is Used
Vertical Axis Holding
Secures a 100mm bore vertical lift at any intermediate height, using the 5500 N clamp to prevent gravity-driven drops during air loss.
Power Failure Safety
Maintains the exact position of a heavy workpiece mid-stroke when shop air pressure drops, ensuring the load stays put instead of crashing down.
Machining Position Lock
Freezes the rod at a precise intermediate point for a secondary operation, holding the 3927 N load steady without relying on live air pressure.
Is the Airtac BSAI Locking Clamp Cylinder BSAI100X400 the Right Clamp-Lock?
Choose this 100mm bore when an application requires 3927 N of thrust at 0.5 MPa combined with a robust 5500 N static hold anywhere in the travel. If your load is lighter, stepping down to an 80mm bore provides 1400 N holding force and 2513 N thrust; if heavier, a 125mm bore offers 8600 N holding force and 6136 N thrust. Select BSAI over a SAIL model when you need mid-stroke holding rather than just an end-of-stroke lock, or choose a plain SAI cylinder if no clamping is necessary.
This single-rod configuration uses PT tapered ports (1/2 inch cylinder port, G1/8 enclasp port) and accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. It lacks a standard magnet, so CMSE reed or DMSE electronic sensors cannot be used unless a -S option is specified. Because the 400mm stroke is substantial, an external guide is recommended to support the rod and prevent excessive side-loading, despite the sturdy M20x1.5 rod thread. Always unlock the clamp with balanced pressures to prevent the rod from jumping abruptly, 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 BSAI100X400 FAQ
The clamp-lock provides a static holding force of 5500 N. It is spring-applied and air-released, meaning it grips the rod at any position automatically when air is removed, and requires 0.15-0.7 MPa at the G1/8 port to unlock.
No, the clamp locks only AFTER the cylinder has stopped; it cannot brake a moving rod. It must be unlocked with balanced air pressures on both sides of the piston, or the rod can move abruptly. For human safety, an additional independent safety measure is required.
Related AirTAC Lock & Standard Cylinders
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