Airtac BSAID Clamp Cylinder BSAID40X80S
The AirTAC Airtac BSAID Clamp Cylinder BSAID40X80S 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 BSAID40X80S
The AirTAC BSAID40X80-S is a double-acting ISO 15552 profile cylinder featuring a rod extending from both ends and an integrated spring-applied, air-released clamp-lock. It delivers a bidirectional static holding force of 900 N at any position along its 80 mm travel. Because it is a double-rod design, the thrust is equal in both directions at 528 N (0.5 MPa), and the second rod allows you to mount a guide, counterweight, or position flag on the opposite end for dual-side guidance. Keep in mind that holding force and thrust are distinct metrics; you must size the 900 N clamp capacity against your static load, not the cylinder's push/pull thrust.
The enclasp mechanism requires a third G1/8 pneumatic port (separate from the 1/4 cylinder ports) to release the grip, operating within a 0.15-0.7 MPa range. The clamp locks only after the piston has stopped, meaning it cannot brake a moving rod. Furthermore, you must balance the air pressure on both sides of the piston before unlocking, or the rod may jump abruptly. The variable air cushion at the stroke ends only decelerates the piston; it does not hold the load.
Airtac BSAID Clamp Cylinder BSAID40X80S Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID40X80S |
|---|---|
| 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 BSAID40X80S Is Used
Vertical Lift Holding
Maintains a 900 N vertical load at any intermediate height without relying on continuous air pressure, preventing sudden drops during power loss.
Machining Position Lock
Secures a dual-sided workpiece fixture rigidly in place for intermediate machining or inspection steps, using the second rod for an external guide.
Emergency Safety Stop
Provides a bidirectional hold to freeze a stopped load mid-stroke during an unexpected air supply failure, though an external brake is required for human safety.
Is the Airtac BSAID Clamp Cylinder BSAID40X80S the Right Clamp-Lock?
Choose this double-rod clamp-lock model when a process requires workpiece mounting on one rod end and an anti-rotation guide or position flag on the other. If you do not need dual-side guidance, a single-rod BSAI40X80-S provides the same 900 N hold with a simpler footprint. This BSAID variant outperforms a SAIL40 stroke-end lock because it grips anywhere along the travel, whereas SAIL only holds at the extremes. If your load only moves to the ends and stays there under pressure, a plain SAID40 cylinder is sufficient.
For replacement, verify the 40 mm bore, 80 mm stroke, double-rod configuration, and PT port threads. The -S suffix indicates a magnet for CMSE reed and DMSE solid-state sensors. Mounting options for the double-rod body omit the FB, CA, CB, and CR brackets, accepting only Basic, FA, LB, TC, TCM1, and TCM2. The 16 mm carbon steel rod with an M12x1.25 thread handles moderate side loads well. Always ensure the cylinder has stopped before engaging the clamp, and add an independent safety measure if human safety depends on the hold.
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 BSAID40X80S FAQ
The integrated clamp-lock provides a static holding force of 900 N. It locks the rod at any position bidirectionally, but only after the cylinder has come to a complete stop.
You must balance the air pressure on both sides of the piston before applying air to the G1/8 enclasp port. If pressures are not balanced, the rod can jump abruptly upon release. The clamp is not a dynamic brake.
Related AirTAC Lock & Standard Cylinders
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