Airtac BSAID Clamp Cylinder BSAID125X125
The AirTAC Airtac BSAID Clamp Cylinder BSAID125X125 is a genuine double-acting ISO 15552 cylinder with a Ø125mm bore, 125mm 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
- Stroke125 mm
- Cylinder portG1/2
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM27×2
About the Airtac BSAID Clamp Cylinder BSAID125X125
The AirTAC BSAID125X125 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 gripper secures the piston rod at any position along its 125 mm travel, delivering a robust static holding force of 8600 N. Because it is a double-rod actuator, the thrust is equal in both directions at 5734 N (based on 0.5 MPa), and the second rod allows you to mount a position flag or secondary tool on the opposite end for dual-side guidance.
It is vital to distinguish this 8600 N static holding force from the cylinder's 5734 N dynamic thrust; you must size the clamp against the static load weight, not the actuator's push force. The clamp operates via a dedicated G1/8 enclasp port and requires balanced air pressure to unlock safely. Note that the variable air cushion only decelerates the piston near stroke ends, while the mechanical clamp is what actually holds the load.
Airtac BSAID Clamp Cylinder BSAID125X125 Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID125X125 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 BSAID125X125 Is Used
Vertical Load Holding
Secures heavy vertical lifting platforms at any intermediate height without relying on continuous air pressure, utilizing the 8600 N holding force.
Machining Position Lock
Clamps a heavy workpiece in a specific location along the stroke for machining or inspection, using the second rod for a counterweight.
Power Loss Safety
Engages automatically via spring force during a compressed air failure to freeze the double-rod payload exactly where it stopped.
Is the Airtac BSAID Clamp Cylinder BSAID125X125 the Right Clamp-Lock?
Choose this 125 mm bore when an application demands high load holding that a smaller bore cannot achieve; stepping down to a 100 mm bore reduces the holding force to 5500 N and thrust to 3681 N. Select the BSAID double-rod configuration when you need equal force both ways or a secondary mounting surface for external guides. If you only need to secure a load at the fully extended or retracted stroke ends, a SAIL cylinder suffices, but BSAI/BSAID is required for locking at any intermediate position. For standard end-position movement without locking, a plain SAID cylinder is adequate.
When replacing this actuator, match the double-rod configuration, 125 mm bore, 125 mm stroke, and PT port threads. The BSAID mounting set includes Basic, FA, LB, TC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). As this model lacks the -S magnet, it does not support CMSE or DMSE sensors. Always ensure the cylinder has stopped before applying the clamp, as it cannot brake a moving rod, and verify balanced pressures before unlocking to prevent the rod from jumping abruptly. Safety-critical applications require an independent external holding 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 BSAID Clamp Cylinder BSAID125X125 FAQ
It uses a spring-applied, air-released mechanism to grip the rod at any position along the stroke, providing an 8600 N static holding force. It locks only after the cylinder has stopped and cannot be used to brake a moving load.
No, the variable air cushion only decelerates the piston near the stroke ends. The mechanical clamp-lock provides the actual holding force, and it must be unlocked with balanced air pressures to prevent the rod from jumping.
Related AirTAC Lock & Standard Cylinders
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