Airtac BSAID Clamp Cylinder BSAID125X800S
The AirTAC Airtac BSAID Clamp Cylinder BSAID125X800S is a genuine double-acting ISO 15552 cylinder with a Ø125mm bore, 800mm 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
- Stroke800 mm
- Cylinder portG1/2
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM27×2
About the Airtac BSAID Clamp Cylinder BSAID125X800S
The AirTAC BSAID125X800-S is a double-acting ISO 15552 profile cylinder featuring a double-rod configuration and a spring-applied, air-released clamp-lock. It delivers an equal thrust of 5734 N in both directions at 0.5 MPa, while the integrated enclasp mechanism provides a static holding force of 8600 N. Buyers must distinguish this holding force from the cylinder thrust: the clamp resists an external static load, whereas thrust dictates movement. The rod extends from both ends, allowing you to mount a workpiece on one side and a counterweight or position flag on the other for dual-side guidance. A third G1/8 enclasp port controls the unlock function, requiring balanced air pressure on both sides of the piston to prevent the rod from jumping abruptly upon release. Furthermore, the variable air cushion only decelerates the piston near stroke end; the clamp itself is what secures the load.
Airtac BSAID Clamp Cylinder BSAID125X800S Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID125X800S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 800 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 BSAID125X800S Is Used
Vertical Load Holding
Maintains a heavy elevated platform at any point in its 800 mm travel using 8600 N of clamp force, preventing gravity-driven falls during air pressure loss.
Machining Position Lock
Secures a dual-sided workpiece fixture rigidly for intermediate machining or inspection stops, utilizing the double-rod design for balanced tool mounting.
Emergency Safety Hold
Arrests unintended movement of heavy lifting mechanisms by clamping the rod instantly after the cylinder stops, requiring a balanced-pressure release to resume motion.
Is the Airtac BSAID Clamp Cylinder BSAID125X800S the Right Clamp-Lock?
Choose this 125 mm bore model when an application demands substantial mid-stroke holding and equal push/pull force. If the 5734 N thrust or 8600 N holding capacity exceeds your load requirements, stepping down to the 100 mm bore (3681 N thrust, 5500 N hold) may optimize space and air consumption. Conversely, lighter duties might use a plain SAID cylinder if locking is unnecessary. BSAI/BSAID locks at any position along the travel, unlike SAIL which only holds at stroke end. Remember the clamp engages only after the rod stops; it cannot brake a moving load, and safety-critical applications require an independent backup measure. This 800 mm stroke variant uses a PT tapered port thread, includes a magnet for CMSE reed and DMSE electronic sensors, and accepts Basic, FA, LB, TC, TCM1, or TCM2 mountings. Given the 800 mm stroke, an external guide is recommended to manage side loads on the M27x2 rod.
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 BSAID125X800S FAQ
The integrated enclasp clamp provides a static holding force of 8600 N. It locks the rod at any position bidirectionally, but only engages after the cylinder has completely stopped moving.
The clamp unlocks via a third G1/8 enclasp port, but only when the air pressures on both sides of the piston are balanced. Releasing it without balanced pressure can cause the rod to jump abruptly, so an independent safety measure is required for human-safety loads.
Related AirTAC Lock & Standard Cylinders
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