Airtac BSAI Locking Clamp Cylinder BSAI100X400S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI100X400S 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
- 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 BSAI100X400S
The AirTAC BSAI100X400-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock mechanism. A defining feature of this series is its ability to lock the piston rod at any position along its 400 mm stroke, providing a robust static holding force of 5500 N without requiring continuous live air pressure. Because it includes the -S magnet, it integrates seamlessly with AirTAC CMSE reed and DMSE electronic solid-state sensors for precise end-position detection.
It is crucial to distinguish this 5500 N holding force from the cylinder thrust; the clamp sustains static loads, while the pneumatic thrust (3927 N push at 0.5 MPa) drives the motion. The clamp utilizes a dedicated G1/8 enclasp port—separate from the 1/2 inch cylinder ports—and requires a balanced 0.15-0.7 MPa air pressure to release safely. Furthermore, the variable air cushions only decelerate the piston near the stroke ends; they do not hold the load, as the mechanical clamp is the sole holding device.
Airtac BSAI Locking Clamp Cylinder BSAI100X400S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI100X400S |
|---|---|
| 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 BSAI100X400S Is Used
Vertical Axis Holding
Secures heavy vertical loads at any point in the 400 mm travel, preventing gravity-induced drops during an air pressure loss without relying on live pressure.
Emergency Power Loss Safety
Engages instantly upon loss of system air to freeze the rod mid-stroke, protecting operators and workpieces from unexpected machine crashes.
Machining Position Hold
Locks the workpiece firmly in a specific intermediate position for machining or inspection operations, ensuring zero deflection under tooling forces.
Is the Airtac BSAI Locking Clamp Cylinder BSAI100X400S the Right Clamp-Lock?
Choose this 100 mm bore when an application demands high load holding that exceeds the 3600 N capacity of the 80 mm bore variant. If the 3927 N thrust at 0.5 MPa is excessive for your workpiece, stepping down to the 63 mm bore offers 1559 N thrust and a 2200 N holding force. This BSAI100X400-S model is preferred over a SAIL cylinder when you need to arrest and hold a load at an intermediate stroke position, rather than solely at the stroke end. A plain SAI cylinder remains sufficient if no intermediate locking is required.
When replacing or specifying this unit, note the single-rod configuration, PT tapered port threads, and the extensive mounting set compatibility (Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, TCM2). The 25 mm rod and M20x1.5 thread provide excellent side-load resistance, but with a 400 mm stroke, an external guide rail is still recommended to prevent lateral stress. Remember the clamp locks only after the cylinder has stopped; it cannot brake a moving rod, and unlocking requires balanced piston pressures to prevent the rod from jumping abruptly. For safety-critical applications, an independent external safety measure is mandatory.
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 BSAI100X400S FAQ
The BSAI100X400-S provides a static holding force of 5500 N and features a bidirectional clamp-lock that can secure the rod at any position along its 400 mm stroke, not just at the ends.
The clamp is spring-applied and air-released via a dedicated G1/8 port. It only locks after the rod has stopped moving and cannot act as a brake. To unlock it safely, the air pressures on both sides of the piston must be balanced; otherwise, the rod may move abruptly upon release.
Related AirTAC Lock & Standard Cylinders
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