Airtac BSAID Clamp Cylinder BSAID40X80
The AirTAC Airtac BSAID Clamp Cylinder BSAID40X80 is a genuine double-acting ISO 15552 cylinder with a Ø40mm 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 900 N.
- BoreØ40 mm
- Stroke80 mm
- Cylinder portG1/4
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM12×1.25
About the Airtac BSAID Clamp Cylinder BSAID40X80
The AirTAC BSAID40X80 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 clamps the piston rod to hold the load at any position along the 80mm stroke, delivering a static holding force of 900 N. Because it is a double-rod actuator, the thrust is equal in both directions at 528 N, and the rod extends from both end caps. Remember that this holding force is a distinct quantity from the cylinder's thrust; you must size the clamp's 900 N capacity against your static load, not the 528 N drive force.
The clamping action is bidirectional, securing the rod whether it was extending or retracting, but it only engages after the rod has stopped moving—it cannot brake a moving load. To release the lock, air must be supplied to the dedicated G1/8 enclasp port, which requires balanced pressure on both sides of the piston to prevent the rod from jumping abruptly. The double-rod layout is specifically chosen to mount a workpiece on one end and a guide, counterweight, or position flag on the other, providing dual-side anti-rotation guidance.
Airtac BSAID Clamp Cylinder BSAID40X80 Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID40X80 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 mm |
| Type | Double rod (BSAID), double acting |
| Cylinder port | G1/4 |
| Rod thread | M12×1.25 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 900 N |
| Enclasp / unlock port | G1/8 |
| Operating pressure | 0.15 – 0.7 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Max stroke | Up to 800 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 (Ø40 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa (max) | 880 N | — |
Equal force both directions (double rod). Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (900 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAID Clamp Cylinder BSAID40X80 Is Used
Vertical Axis Hold
Locks a 40mm double-rod payload at any vertical height with 900 N of holding force, preventing gravity drops when air pressure is removed.
Machining Position Hold
Secures the dual-rod workpiece rigidly at a mid-stroke machining point, using the second rod for anti-rotation guidance during the operation.
Power Loss Safety
The spring-applied clamp engages automatically anywhere in the 80mm travel during a power or air loss, holding the load until pressure is restored.
Is the Airtac BSAID Clamp Cylinder BSAID40X80 the Right Clamp-Lock?
Choose the BSAID40X80 when you need precise mid-stroke holding and dual-side guidance. If 528 N of thrust or 900 N of holding force is insufficient, step up to the BSAID50X80, which offers 825 N of thrust and 1400 N of holding force. Conversely, if the load is lighter, the BSAID32X80 provides 345 N of thrust and 600 N of holding force. This model outperforms a SAIL cylinder because it locks at any position, whereas SAIL only holds at stroke ends; if mid-stroke locking isn't needed, a plain SAID double-rod cylinder suffices.
When replacing this actuator, match the 40mm bore, 80mm stroke, double-rod layout, and PT port threads. The double-rod design omits the FB, CA, CB, and CR foot and clevis mounts, accepting only Basic, FA, LB, TC, TCM1, and TCM2 brackets. Note that this unit lacks a magnet, so CMSE reed and DMSE electronic sensors cannot be used without a -S variant. The 16mm carbon steel rod and M12x1.25 thread handle side loads well, but for any stroke over 300 mm, an external guide is mandatory. Always ensure the rod has stopped before applying the clamp, and add an independent safety measure for human-safety-critical holds, as the lock releases only under balanced pressure.
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 BSAID40X80 FAQ
It uses a spring-applied, air-released mechanism to grip the 16mm rod, providing a static holding force of 900 N at any position along the stroke. It locks only after the cylinder has stopped and cannot brake a moving load.
Air must be supplied to the G1/8 enclasp port, but the pressures on both sides of the piston must be balanced first. If unbalanced, the rod can jump abruptly upon release, so ensure the cylinder has stopped before unlocking.
Related AirTAC Lock & Standard Cylinders
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