Airtac BSAI Locking Clamp Cylinder BSAI80X450
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X450 is a genuine double-acting ISO 15552 cylinder with a Ø80mm 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 3600 N.
- BoreØ80 mm
- Stroke450 mm
- Cylinder portG3/8
- 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 BSAI80X450
The AirTAC BSAI80X450 is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock mechanism. It generates 2513 N of push thrust at 0.5 MPa and features a robust 25 mm carbon steel rod with an M20x1.5 thread. A defining trait of this series is the enclasp gripper, which clamps the rod to secure a load at any point along the 450 mm travel. The static holding force is 3600 N, a quantity entirely separate from the cylinder thrust; you must size the holding capacity against your static load rather than the pneumatic push force.
This unit operates at 0.15-0.7 MPa and uses a 3/8 PT cylinder port, plus a dedicated G1/8 enclasp port to release the lock. The clamp is bidirectional, holding whether the rod was extending or retracting. It is crucial to understand that the variable air cushion at the stroke ends only decelerates the piston; it does not hold the load. The clamp locks only after the rod has stopped, meaning it cannot brake a moving rod, and unlocking requires balanced air pressures on both sides of the piston to prevent abrupt rod movement.
Airtac BSAI Locking Clamp Cylinder BSAI80X450 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X450 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 450 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G3/8 |
| Rod thread | M20×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 3600 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 (Ø80 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa (max) | 3519 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (3600 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI80X450 Is Used
Vertical Axis Mid-Stroke Hold
Secures a 2513 N vertical load at any position along the 450 mm travel without relying on continuous air pressure, utilizing the 3600 N static clamp.
Emergency Drop Prevention
Engages the spring-applied clamp instantly upon loss of air pressure, holding the stopped rod safely in place to prevent sudden falls.
Machining Position Lock
Holds a workpiece rigidly at a custom stroke position for machining or inspection, ensuring the 25 mm rod does not drift under cutting forces.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X450 the Right Clamp-Lock?
Select the BSAI80X450 when an application demands mid-stroke load holding that a plain SAI or a SAIL stroke-end lock cannot provide. If the 3600 N holding force is insufficient, step up to the 125 mm bore, which offers 8600 N holding force and 6136 N thrust at 0.5 MPa. If your load is lighter, the 63 mm bore provides 2200 N holding force and 1559 N thrust. Because the 450 mm stroke is substantial, an external guide is recommended to prevent side loads from damaging the 25 mm carbon steel rod, despite its inherent rigidity. This single-rod variant supports Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. It uses PT ports and lacks a magnet, so CMSE or DMSE sensors cannot be used without a -S variant. For safety-critical holds, add an independent mechanical measure, as the clamp cannot arrest dynamic motion and must be released under balanced pressure.
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 BSAI80X450 FAQ
The clamp-lock provides a static holding force of 3600 N. It engages via a spring-applied mechanism to hold the 25 mm rod at any position along the 450 mm stroke, independent of the 2513 N pneumatic thrust.
The clamp locks only after the cylinder has stopped and cannot brake a moving rod. To unlock it safely, you must apply 0.15-0.7 MPa to the G1/8 enclasp port only after balancing pressures on both sides of the piston, preventing abrupt rod jumps.
Related AirTAC Lock & Standard Cylinders
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