Airtac BSAID Clamp Cylinder BSAID125X500S
The AirTAC Airtac BSAID Clamp Cylinder BSAID125X500S is a genuine double-acting ISO 15552 cylinder with a Ø125mm bore, 500mm 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
- Stroke500 mm
- Cylinder portG1/2
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM27×2
About the Airtac BSAID Clamp Cylinder BSAID125X500S
The AirTAC BSAID125X500-S 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 clamps the piston rod to secure the load at any position along the 500 mm stroke, delivering a static holding force of 8600 N. Because it is a double-rod design, the cylinder generates equal thrust in both directions, offering 5734 N of push and pull force at 0.5 MPa. It is crucial to distinguish this holding force from the cylinder thrust: the 8600 N rating defines the clamp's static grip on the rod, not the pneumatic drive power, so you must size the holding force against your static load.
This model includes a -S magnet for position sensing via AirTAC CMSE (reed) or DMSE (electronic) switches fitted into the profile grooves. The clamp mechanism relies on a separate G1/8 enclasp port to release the rod, requiring an unlock pressure of 0.15-0.7 MPa. Remember that the variable air cushions at both ends only decelerate the piston near stroke extremes; the mechanical clamp is the sole device holding the load. The double-rod architecture allows mounting a workpiece on one end and a guide, counterweight, or position flag on the opposite end, providing dual-side guidance and anti-rotation benefits.
Airtac BSAID Clamp Cylinder BSAID125X500S Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID125X500S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 BSAID125X500S Is Used
Vertical Z-Axis Hold
Secures heavy vertical lifting platforms at any intermediate height during operation, preventing gravity-induced drops when air pressure is removed.
Machining Position Lock
Freezes a dual-sided workpiece fixture in place mid-stroke for high-precision drilling or inspection, using the 8600 N clamp to resist cutting forces.
Emergency Drop Prevention
Acts as a fail-safe arrestor on dual-rod actuators, gripping the rod instantly upon an unexpected pneumatic power loss to hold the payload stationary.
Is the Airtac BSAID Clamp Cylinder BSAID125X500S the Right Clamp-Lock?
Choose this 125 mm bore model when an application demands substantial equal-force bidirectional movement and failsafe holding mid-stroke. If your load requires less force, stepping down to a 100 mm bore provides 3681 N of thrust both ways and a 5500 N holding force. Conversely, the 125 mm bore is the largest available in this series, offering the maximum 8600 N clamp grip alongside a robust 32 mm rod and M27x2 thread, which provides excellent resistance to side loads. For strokes of 500 mm or longer, an external guide rail is highly recommended to prevent excessive rod wear and binding, as even large rods need support over extended travels.
Select the BSAID clamp-lock over a plain SAID double-rod cylinder when you must prevent drift on power loss at any point in the travel, rather than relying solely on cushions. Compared to a SAIL stroke-end lock, this BSAID model secures the rod anywhere along its path. When specifying a replacement, match the double-rod format, 125 mm bore, 500 mm stroke, and PT port threads. Mounting options for the double-rod design omit FB, CA, CB, and CR, utilizing Basic, FA, LB, TC, TCM1, or TCM2 brackets. The clamp locks only after the cylinder has stopped; it cannot brake a moving rod. Furthermore, it must be unlocked with balanced air pressures on both sides of the piston, or the rod may jump abruptly. For safety-critical human loads, an independent external safety measure is mandatory.
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 BSAID125X500S FAQ
The clamp-lock provides a static holding force of 8600 N and can secure the double rod at any position along the 500 mm stroke. It is a bidirectional, spring-applied, air-released mechanism that grips the rod independently of the cylinder's 5734 N thrust force.
The clamp cannot brake a moving rod; it only locks after the cylinder has stopped. To release it safely, air pressures on both sides of the piston must be balanced via the G1/8 enclasp port. Releasing the clamp with unbalanced pressures will cause the rod to jump abruptly, so an independent safety measure is required for human safety.
Related AirTAC Lock & Standard Cylinders
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