Airtac BSAI Locking Clamp Cylinder BSAI50X450
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X450 is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 450mm 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 1400 N.
- BoreØ50 mm
- Stroke450 mm
- Cylinder portG1/4
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM16×1.5
- 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 BSAI50X450
The AirTAC BSAI50X450 is a double-acting ISO 15552 profile cylinder with a built-in clamp-lock mechanism. A spring-applied, air-released gripper clamps the 20 mm carbon steel rod, providing a static holding force of 1400 N at any position along the 450 mm stroke. The cylinder generates 982 N of push thrust at 0.5 MPa, but the holding force is a separate mechanical quantity sized purely against the static load, not the pneumatic thrust.
This bidirectional clamp locks the rod whether it was extending or retracting, but it only engages after the piston has stopped and cannot brake a moving load. Unlocking requires balanced air pressure on both sides of the piston via a third G1/8 enclasp port, preventing abrupt rod jumps upon release. The variable air cushion at the ends only decelerates the piston near stroke limits; the clamp is the sole device holding the load.
Airtac BSAI Locking Clamp Cylinder BSAI50X450 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X450 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 450 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G1/4 |
| Rod thread | M16×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 1400 N |
| Enclasp / unlock port | G1/8 |
| Operating pressure | 0.15 – 0.7 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 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 (Ø50 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa (max) | 1374 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (1400 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI50X450 Is Used
Vertical Axis Hold
Freezes a lowered vertical load at any intermediate height, preventing gravity drops during air pressure loss.
Mid-Stroke Machining
Secures a workpiece at a precise non-end position for drilling or inspection without relying on cushioning.
Power Failure Safety
Maintains the rod exactly where it stopped during an outage, requiring balanced pressure to unlock safely.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X450 the Right Clamp-Lock?
Choose this 50 mm bore when a 40 mm bore (528 N pull thrust, 900 N holding force) is too weak to hold your static load, but a 63 mm bore (1559 N push thrust, 2200 N holding force) is physically oversized. The BSAI50X450 is preferred over a SAIL stroke-end lock when you must freeze the rod mid-travel rather than only at the extremes. For simple pushing without position holding, a plain SAI cylinder is sufficient.
This model features PT tapered ports, a 1/4 inch cylinder port, and accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, or TCM2 mounts. Because this stroke is 450 mm, an external guide rail is recommended to prevent side-load wear on the M16x1.5 rod thread. The clamp locks only after the cylinder stops; safety-critical applications need an additional independent safety measure.
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 BSAI50X450 FAQ
The spring-applied clamp provides a static holding force of 1400 N at any position along the stroke. This is independent of the 982 N pneumatic thrust and only holds the load after the rod has completely stopped.
You must apply air to the G1/8 enclasp port to release the spring clamp, but only after balancing the pressures on both sides of the piston. Releasing under unbalanced pressure causes the rod to move abruptly.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac BSAI Locking Clamp Cylinder BSAI50X450
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