Airtac BSAID Clamp Cylinder BSAID125X80S
The AirTAC Airtac BSAID Clamp Cylinder BSAID125X80S is a genuine double-acting ISO 15552 cylinder with a Ø125mm bore, 80mm 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
- Stroke80 mm
- Cylinder portG1/2
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM27×2
About the Airtac BSAID Clamp Cylinder BSAID125X80S
The AirTAC BSAID125X80-S is a double-acting ISO 15552 profile cylinder featuring a double-rod design and a built-in clamp-lock mechanism. A spring-applied, air-released enclasp gripper secures the piston rod at any position along its 80mm travel, delivering a robust static holding force of 8600 N. Because it is a double-rod variant, the thrust is identical in both directions, generating 5734 N at 0.5 MPa. It is crucial to distinguish this holding force from the cylinder's thrust: the 8600 N clamp rating dictates the static load capacity when stationary, whereas the 5734 N thrust drives the movement.
The dual-rod architecture serves a specific mechanical purpose beyond equal force: it allows you to mount a workpiece on one end and a counterweight, guide, or position flag on the opposite end, providing dual-side guidance and anti-rotation. Unlocking requires a third G1/8 enclasp port fed at 0.15-0.7 MPa, but only after the cylinder has stopped and the pressures on both sides of the piston are balanced; otherwise, the rod can jump abruptly. The variable air cushion at the stroke ends only decelerates the piston and does not contribute to holding the load. This carbon-steel rod version includes a magnet for CMSE reed and DMSE solid-state sensors.
Airtac BSAID Clamp Cylinder BSAID125X80S Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID125X80S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 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 BSAID125X80S Is Used
Vertical Load Holding
Secures heavy vertical lifting platforms at any intermediate height during power loss, preventing gravity-driven drops.
Machining Position Lock
Holds an offset workpiece rigidly on one rod end while the opposite end supports a guide, absorbing cutting forces without drift.
Emergency Safety Stop
Maintains a guarded barrier or heavy gate in a fixed mid-travel position until air pressure is safely balanced for release.
Is the Airtac BSAID Clamp Cylinder BSAID125X80S the Right Clamp-Lock?
Select this 125mm bore model when an application demands extreme mid-stroke holding capacity that a smaller bore cannot achieve; stepping down to a 100mm bore reduces the holding force to 5500 N and the bidirectional thrust to 3681 N. Choose this BSAID clamp-lock over a plain SAID double-rod cylinder when power-off safety or mid-stroke positioning is required. It also outperforms a SAIL cylinder, which only secures the load at the stroke ends, whereas this unit locks anywhere along the travel. Remember that the clamp engages only after the rod stops; it cannot brake a moving load, and safety-critical applications require an additional independent safety measure.
For a direct replacement, match the double-rod configuration, 125mm bore, 80mm stroke, and PT tapered port threads. The BSAID mounting set omits the FB, CA, CB, and CR brackets, accepting only Basic, FA, LB, TC, TCM1, and TCM2 mounts. The large 32mm rod and M27x2 thread provide excellent side-load resistance, though external guidance is still advised for heavy offsets. Ensure the -S magnet is specified if CMSE or DMSE position sensing is needed.
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 BSAID125X80S FAQ
The spring-applied clamp-lock provides a static holding force of 8600 N. It engages at any position along the stroke to hold the load securely, but only after the rod has come to a complete stop.
The clamp is released via a third G1/8 enclasp port, but only after the cylinder has stopped and the air pressures on both sides of the piston are balanced. Releasing it under unbalanced pressure can cause the rod to jump abruptly.
Related AirTAC Lock & Standard Cylinders
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