Airtac BSAI Locking Clamp Cylinder BSAI100X250S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI100X250S is a genuine double-acting ISO 15552 cylinder with a Ø100mm bore, 250mm 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
- Stroke250 mm
- Cylinder portG1/2
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM20×1.5
About the Airtac BSAI Locking Clamp Cylinder BSAI100X250S
The AirTAC BSAI100X250-S is a double-acting ISO 15552 profile cylinder with a spring-applied, air-released enclasp mechanism that clamps the 25 mm carbon steel rod to hold loads at ANY stroke position. It delivers a static holding force of 5500 N, while generating 5497 N of push thrust at a 0.7 MPa practical maximum pressure. Remember that holding force and thrust are separate quantities: you must size the clamp's 5500 N capacity against your static load, not the cylinder's 5497 N push force. The lock is bidirectional, engaging whether the rod was extending or retracting.
This model includes the -S magnet for precise position sensing with AirTAC CMSE reed switches or DMSE solid-state electronic sensors. The clamp operates via a third G1/8 enclasp port, requiring 0.15-0.7 MPa to release. Crucially, the variable air cushion at the stroke ends only decelerates the piston; it is the mechanical clamp that actually secures the load.
Airtac BSAI Locking Clamp Cylinder BSAI100X250S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI100X250S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø100 mm |
| Stroke | 250 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 BSAI100X250S Is Used
Vertical Axis Load Holding
Secures heavy vertical loads at any point along the 250 mm travel, providing 5500 N of holding force without relying on continuous air pressure.
Emergency Power-Loss Hold
The spring-applied clamp engages instantly upon air loss to freeze the rod in place, preventing uncontrolled drops mid-stroke.
Machining Position Lock
Freezes the workpiece securely at a specific intermediate stroke position for machining or inspection operations.
Is the Airtac BSAI Locking Clamp Cylinder BSAI100X250S the Right Clamp-Lock?
Step down to a bore 80 model if your load requires less than 3600 N of holding force or 2513 N of thrust at 0.5 MPa, or step up to bore 125 for 8600 N holding capacity. Choose this BSAI clamp-lock over a SAIL cylinder when you need to hold the load at any intermediate point in the stroke, rather than just at the stroke end. If you only need end-of-stroke positioning, a plain SAI cylinder suffices. This 250 mm stroke is safely under the 1000 mm standard maximum, but always ensure adequate side-load support.
The clamp locks only AFTER the cylinder has stopped; it cannot brake a moving rod. You must unlock the clamp with balanced air pressures on both sides of the piston, or the rod may jump abruptly. For human-safety-critical applications, an additional independent safety measure is required. Replacement matching requires a single rod, 100 mm bore, 250 mm stroke, PT ports, and the BSAI mounting set (Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, TCM2). The M20x1.5 rod thread provides robust strength for carrying higher side loads.
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 BSAI100X250S FAQ
The BSAI100X250-S provides a static holding force of 5500 N. The clamp is bidirectional and locks the rod at any position along the stroke, operating independently from the cylinder's 5497 N thrust.
The clamp locks only after the cylinder has stopped and cannot brake a moving rod. To unlock it safely, you must apply balanced air pressures to both sides of the piston via the G1/8 enclasp port; otherwise, the rod can move abruptly.
Related AirTAC Lock & Standard Cylinders
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