Airtac BSAI Locking Clamp Cylinder BSAI100X900S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI100X900S is a genuine double-acting ISO 15552 cylinder with a Ø100mm bore, 900mm 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
- Stroke900 mm
- Cylinder portG1/2
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM20×1.5
About the Airtac BSAI Locking Clamp Cylinder BSAI100X900S
The AirTAC BSAI100X900-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock mechanism. A defining feature is its ability to lock the piston rod at any position along its 900 mm stroke, providing a robust static holding force of 5500 N. The carbon steel rod extends with a practical thrust of 3927 N at 0.5 MPa, reaching 5497 N at the 0.7 MPa maximum operating pressure. Remember that the 5500 N clamp holding force is a separate quantity from the cylinder thrust; you must size the holding force against your static load, not the push thrust.
This model includes a -S magnet for position sensing via AirTAC CMSE (reed) or DMSE (electronic) switches fitted into the sensor grooves. The clamping system relies on a third G1/8 enclasp port, distinct from the 1/2 cylinder ports, requiring 0.15-0.7 MPa to release. Note that the variable air cushions only decelerate the piston near stroke ends; the mechanical clamp is the sole device responsible for securing the load.
Airtac BSAI Locking Clamp Cylinder BSAI100X900S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI100X900S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø100 mm |
| Stroke | 900 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 BSAI100X900S Is Used
Vertical Load Holding
Secures heavy vertical workpieces at any intermediate height along the 900 mm travel, preventing drops during air pressure loss.
Machining Position Hold
Locks a part rigidly in place with 5500 N of holding force for machining or inspection operations without maintaining live air pressure.
Emergency Stop Safety
Holds the load securely wherever the rod stopped during an emergency stop or power loss event, requiring balanced pressure to release safely.
Is the Airtac BSAI Locking Clamp Cylinder BSAI100X900S the Right Clamp-Lock?
Choose this 100 mm bore when a 63 mm bore (1402 N pull, 2200 N hold) lacks the holding capacity for a heavy vertical load. If you only need to hold at the stroke end, a plain SAIL lock cylinder suffices, but the BSAI wins when intermediate position holding is required. For applications without any locking needs, a standard SAI cylinder is simpler. The clamp locks only after the rod has stopped; it cannot brake a moving load. Furthermore, it must be unlocked with balanced air pressures on both sides of the piston, or the rod may jump abruptly. Safety-critical applications require an independent external measure.
As a replacement, match the single-rod configuration, 100 mm bore, 900 mm stroke, and PT tapered ports. The 25 mm rod and M20x1.5 thread provide substantial side-load capability, but at 900 mm, an external guide is highly recommended to prevent rod bending. It accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. Operating speed is 30-500 mm/s.
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 BSAI100X900S FAQ
The BSAI100X900-S provides a static holding force of 5500 N. It uses a spring-applied, air-released mechanism to lock the rod bidirectionally at any position along the stroke, but it only locks after the cylinder has stopped moving.
The clamp uses a separate G1/8 enclasp port and requires balanced air pressures on both sides of the piston to unlock. If pressures are not balanced, the rod can move abruptly upon release. For human safety, an additional independent safety measure is required.
Related AirTAC Lock & Standard Cylinders
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