Airtac BSAID Clamp Cylinder BSAID125X200
The AirTAC Airtac BSAID Clamp Cylinder BSAID125X200 is a genuine double-acting ISO 15552 cylinder with a Ø125mm bore, 200mm 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
- Stroke200 mm
- Cylinder portG1/2
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM27×2
About the Airtac BSAID Clamp Cylinder BSAID125X200
The AirTAC BSAID125X200 is a double-acting ISO 15552 profile cylinder featuring a double-rod design and an integrated clamp-lock mechanism. A spring-applied, air-released enclasp gripper secures the piston rod at any position along the 200 mm travel, delivering a static holding force of 8600 N. Because it is a double-rod unit, the thrust is equal in both directions at 5734 N (0.5 MPa), and the second rod allows you to mount a counterweight, position flag, or secondary tool on the opposite end for dual-side guidance and anti-rotation.
It is critical to distinguish holding force from thrust: the 8600 N clamp force is a separate static metric from the 5734 N pneumatic thrust, so you must size the clamp against the static load, not the cylinder push force. Furthermore, the variable air cushions at stroke ends only decelerate the moving piston; the mechanical clamp is the actual holding device. The clamp locks only after the rod has stopped and cannot brake a moving load. Unlocking requires a third G1/8 enclasp port and balanced air pressures on both piston sides, or the rod may jump abruptly upon release.
Airtac BSAID Clamp Cylinder BSAID125X200 Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID125X200 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 200 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 BSAID125X200 Is Used
Vertical Load Holding
Secures heavy vertical lifts at any intermediate stroke position, preventing drops during power loss while offering equal push and pull thrust.
Machining Position Lock
Holds a dual-sided workpiece or fixture rigidly in place during milling or inspection, using the 8600 N static clamp force rather than relying on air cushions.
Dual-Tool Assembly Station
Uses the second rod end to mount a counter-tool or position flag, maintaining balanced force both directions while locking the assembly mid-travel.
Is the Airtac BSAID Clamp Cylinder BSAID125X200 the Right Clamp-Lock?
Choose this double-rod clamp-lock cylinder when a process requires holding a load at an intermediate position and demands equal force both ways. If your application only needs end-of-stroke holding, a SAIL model suffices; if no locking is needed, a plain SAID is lighter. If you need higher holding capacity, note there is no larger bore in this series, but a smaller 100 mm bore offers 5500 N holding force and 3681 N thrust. The 125 mm bore uses 1/2 inch PT cylinder ports alongside the G1/8 enclasp port, and its 32 mm rod with an M27x2 thread handles substantial side loads. Mounting options for the double-rod body omit the FB, CA, CB, and CR brackets, offering Basic, FA, LB, TC, TCM1, and TCM2. Without a magnet (-S), this unit cannot use CMSE reed or DMSE electronic sensors. For any safety-critical hold, add an independent mechanical stop, as the clamp cannot arrest dynamic motion and requires balanced pressure to unlock safely.
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 BSAID125X200 FAQ
The BSAID125X200 provides a static holding force of 8600 N. The spring-applied clamp locks the rod at any position along the stroke, holding bidirectionally, but only after the cylinder has come to a complete stop.
The clamp is released via a third G1/8 enclasp port, but only when air pressures on both piston sides are balanced. If pressures are unbalanced, the rod can jump abruptly upon release. An independent safety measure is required for human-safety loads.
Related AirTAC Lock & Standard Cylinders
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