Airtac BSAID Clamp Cylinder BSAID125X450
The AirTAC Airtac BSAID Clamp Cylinder BSAID125X450 is a genuine double-acting ISO 15552 cylinder with a Ø125mm 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 8600 N.
- BoreØ125 mm
- Stroke450 mm
- Cylinder portG1/2
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM27×2
About the Airtac BSAID Clamp Cylinder BSAID125X450
The AirTAC BSAID125X450 is a double-acting ISO 15552 profile cylinder featuring a double-rod configuration and an integrated clamp-lock mechanism. A spring-applied, air-released gripper secures the piston rod, delivering a static holding force of 8600 N at any position along the 450 mm travel. Because it is a double-rod design, the thrust is equal in both directions at 5734 N (0.5 MPa), and the second rod allows you to mount a workpiece on one end and a guide or position flag on the other.
It is vital to distinguish this 8600 N static holding force from the cylinder thrust; the clamp sustains the load without live pressure, whereas thrust moves it. Furthermore, the variable air cushion only decelerates the piston near the stroke ends, while the actual load holding is performed exclusively by the clamp. The enclasp mechanism relies on a separate G1/8 unlock port, requiring a third air line in addition to the two 1/2 inch cylinder ports.
Airtac BSAID Clamp Cylinder BSAID125X450 Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID125X450 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 mm |
| Type | Double rod (BSAID), double acting |
| Cylinder port | G1/2 |
| Rod thread | M27×2 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 8600 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 (Ø125 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa (max) | 8590 N | — |
Equal force both directions (double rod). Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (8600 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAID Clamp Cylinder BSAID125X450 Is Used
Vertical Axis Intermediate Hold
Secures a heavy vertical lift at any point in the 450 mm travel using the 8600 N clamp, preventing descent during an air loss event.
Dual-Tool Machining Station
Mounts a workpiece on one rod end and a secondary tool or position flag on the opposing end, utilizing equal thrust for balanced machining.
Power Loss Safety Stop
Provides a reliable emergency hold wherever the piston stops, ensuring heavy suspended loads remain stationary until pressure is restored.
Is the Airtac BSAID Clamp Cylinder BSAID125X450 the Right Clamp-Lock?
Choose this 125 mm bore when an application demands substantial equal-direction force and intermediate stopping. If your load is lighter, stepping down to a 100 mm bore provides 3681 N thrust and a 5500 N hold. This model outperforms a SAIL cylinder because it locks anywhere, not just at the stroke end, though a plain SAID suffices if no intermediate holding is needed. The 32 mm rod and M27x2 thread provide excellent side-load capacity, but at 450 mm of stroke, external guidance is still recommended to prevent rod binding.
For safe operation, the clamp locks only after the rod has stopped, meaning it cannot brake a moving load. Unlocking requires balanced air pressure on both sides of the piston, or the rod may jump abruptly. Safety-critical applications must include an independent external safety measure. This PT-threaded configuration replaces any double-rod, 125 mm x 450 mm ISO 15552 cylinder and supports Basic, FA, LB, TC, TCM1, and TCM2 mounts.
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 BSAID Clamp Cylinder BSAID125X450 FAQ
The integrated clamp-lock provides a static holding force of 8600 N. It engages via spring pressure to hold the load at any position along the stroke, independent of the cylinder thrust.
The clamp unlocks only when air pressure is applied to the G1/8 enclasp port and the pressures on both sides of the piston are balanced. If the cylinder is not stopped and balanced before unlocking, the rod can move abruptly.
Related AirTAC Lock & Standard Cylinders
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