Airtac BSAI Locking Clamp Cylinder BSAI100X300
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI100X300 is a genuine double-acting ISO 15552 cylinder with a Ø100mm bore, 300mm 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
- Stroke300 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 BSAI100X300
The AirTAC BSAI100X300 is a double-acting ISO 15552 profile cylinder featuring a built-in spring-applied, air-released clamp-lock. It provides a robust static holding force of 5500 N, gripping the carbon steel piston rod securely at any position along its 300 mm travel. Delivering a practical maximum thrust of 5497 N at 0.7 MPa, this unit is designed for heavy-duty positioning. It is crucial to distinguish this static holding force from the cylinder's dynamic thrust; the clamp's 5500 N rating dictates load retention during pressure loss, while thrust governs movement.
This enclasp mechanism is bidirectional, maintaining position whether the rod was extending or retracting. The clamp engages via a dedicated G1/8 third port and only locks after the cylinder has come to a complete stop, meaning it cannot brake a moving load. Furthermore, the lock releases only when air pressures on both sides of the piston are balanced, preventing abrupt rod jumps upon unlocking. The variable air cushions at the stroke ends solely decelerate the piston and do not contribute to holding the load.
Airtac BSAI Locking Clamp Cylinder BSAI100X300 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI100X300 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø100 mm |
| Stroke | 300 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 BSAI100X300 Is Used
Vertical Load Holding
Prevents heavy vertical platens from dropping under power loss, clamping the rod anywhere along the 300 mm stroke with 5500 N of force.
Machining Position Lock
Secures a workpiece firmly in a specific intermediate position for milling or drilling, ensuring the load remains completely stationary without relying on live air pressure.
Emergency Safety Stop
Holds the load safely in place mid-stroke during an unexpected pneumatic pressure drop, acting as a reliable static restraint until system pressure is restored.
Is the Airtac BSAI Locking Clamp Cylinder BSAI100X300 the Right Clamp-Lock?
Choose this 100 mm bore when substantial thrust and holding power are required; if your load is lighter, stepping down to the 80 mm bore offers 3518 N thrust and a 3600 N holding force. The BSAI series is selected over the SAIL model when the application demands locking at any intermediate stroke position rather than just at the end of travel. If position holding is entirely unnecessary, a plain SAI cylinder suffices. For safety-critical operations, note that this clamp locks only after the rod stops and requires balanced pressure to unlock safely; human-safety applications need an additional independent safety measure.
This BSAI100X300 configuration features a single carbon steel rod with an M20x1.5 thread, PT tapered ports (1/2 inch cylinder port, G1/8 enclasp port), and standard 300 mm stroke. Because the stroke is 300 mm or longer, an external guide is recommended to prevent excessive side-loading on the rod. It supports Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mountings. A magnet for CMSE reed or DMSE electronic sensors is not specified for this unit.
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 BSAI100X300 FAQ
The clamp-lock provides a static holding force of 5500 N at any position. However, it is designed to hold a load only after the cylinder has completely stopped; it cannot be used to brake or decelerate a moving rod.
The clamp is spring-applied and air-released via a separate G1/8 port. To unlock safely without the rod jumping, the air pressures on both sides of the piston must be balanced and the cylinder must be stopped before releasing the clamp.
Related AirTAC Lock & Standard Cylinders
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