Airtac BSAI Locking Clamp Cylinder BSAI100X25S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI100X25S is a genuine double-acting ISO 15552 cylinder with a Ø100mm bore, 25mm 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
- Stroke25 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 BSAI100X25S
The AirTAC BSAI100X25-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock that grips the 25mm rod to secure the load at any position along its 25mm stroke. It delivers 3927 N of thrust at 0.5 MPa and features a robust 5500 N static holding force. It is vital to distinguish this holding force from the cylinder thrust: the 5500 N clamp rating is the static load capacity of the brake, not the pneumatic push force, so you must size the clamp against the dead weight of the payload.
This unit includes the -S magnet for precise position sensing with AirTAC CMSE reed and DMSE solid-state switches. The clamp mechanism requires a third G1/8 enclasp port and operates within a 0.15-0.7 MPa pressure range. Remember that the variable air cushion only decelerates the piston near stroke end; the mechanical clamp is the sole device that holds the load. Furthermore, the clamp locks only after the rod has completely stopped, meaning it cannot brake a moving rod.
Airtac BSAI Locking Clamp Cylinder BSAI100X25S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI100X25S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø100 mm |
| Stroke | 25 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 BSAI100X25S Is Used
Vertical Load Holding
Secures heavy vertical payloads at any point in the 25mm travel, preventing sudden drops during power loss.
Machining Position Lock
Holds a workpiece rigidly in place with 5500 N of clamping force to prevent deflection during drilling or milling.
Safety Emergency Stop
Maintains a stopped position safely when air pressure is removed, though human-safety applications require an independent backup.
Is the Airtac BSAI Locking Clamp Cylinder BSAI100X25S the Right Clamp-Lock?
Choose this 100mm bore when a 50mm bore (982 N thrust, 1400 N hold) is insufficient for your payload, but a 125mm bore is oversized. The BSAI100X25-S is ideal when you need to arrest a load mid-stroke rather than just at the end, which is the primary advantage over a SAIL stroke-end lock cylinder. If the application only requires standard extension and retraction without intermediate holding, a plain SAI cylinder suffices.
For safe operation, unlock the clamp only when the air pressures on both sides of the piston are balanced, or the rod may jump abruptly. The PT-threaded cylinder ports are 1/2 inch, and the enclasp port is G1/8. This single-rod variant accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. The 25mm short stroke and 25mm rod thread provide excellent side-load resistance for compact, heavy-duty gripping tasks.
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 BSAI100X25S FAQ
The clamp-lock provides a static holding force of 5500 N. It grips the 25mm rod bidirectionally at any position along the 25mm stroke, but only locks after the cylinder has stopped moving.
The clamp is spring-applied and air-released via a third G1/8 enclasp port. You must balance the air pressure on both sides of the piston before unlocking, otherwise the rod can move abruptly. It is not a moving-rod brake.
Related AirTAC Lock & Standard Cylinders
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