Airtac BSAID Clamp Cylinder BSAID40X400S
The AirTAC Airtac BSAID Clamp Cylinder BSAID40X400S is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 400mm 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
- Stroke400 mm
- Cylinder portG1/4
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM12×1.25
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac BSAID Clamp Cylinder BSAID40X400S
The AirTAC BSAID40X400-S is a double-acting ISO 15552 profile cylinder featuring a double-rod layout and a spring-applied, air-released clamp-lock. It provides an equal 528N thrust in both directions and firmly grips the piston rod at any position along its 400mm travel, delivering a static holding force of 900N. Do not confuse cylinder thrust with the clamp's holding capacity; you must size the 900N holding force against your static load, not the thrust output. A third G1/8 enclasp port supplies the unlock pressure, while the main 1/4 cylinder ports drive the motion.
The double-rod design 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 stability. Remember that the variable air cushion only decelerates the piston near stroke ends; the mechanical clamp is what actually secures the load. This unit includes a magnet for CMSE reed and DMSE electronic sensors.
Airtac BSAID Clamp Cylinder BSAID40X400S Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID40X400S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 BSAID40X400S Is Used
Vertical Axis Hold
Prevents gravity-driven drops on vertical lifts by clamping the rod securely at any intermediate position during a power loss.
Machining Position Lock
Holds a dual-sided workpiece or fixture rigidly in place for machining or inspection without relying on continuous air pressure.
Dual-Side Tooling
Utilizes the second rod end for a counterweight or position flag while the primary end executes the clamping sequence.
Is the Airtac BSAID Clamp Cylinder BSAID40X400S the Right Clamp-Lock?
Choose this 40mm bore if you need 528N bidirectional thrust and 900N static holding power mid-stroke. If your application only requires holding at the stroke end, a plain SAIL cylinder suffices, but choose this BSAID model for true lock-anywhere capability. If you need higher resistance, step up to the 50mm bore, which offers 825N pull thrust and 1400N holding force. Conversely, a 32mm bore provides 345N pull thrust and 600N holding force for lighter loads. Because this is a 400mm stroke, an external guide is recommended to manage side loads despite the rigid double-rod configuration.
This clamp locks only after the cylinder has stopped; it cannot brake a moving rod. You must unlock it with balanced air pressures on both sides of the piston, or the rod may jump abruptly. For safety-critical operations, always add an independent mechanical safety measure. Replacement requires a double-rod 40mm bore, 400mm stroke, PT port threads, and the BSAID mounting set (Basic, FA, LB, TC, TCM1, TCM2), as FB, CA, CB, and CR mounts are omitted.
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 BSAID40X400S FAQ
The clamp-lock provides a static holding force of 900N. It can hold the load at any position along the stroke, but it only engages after the cylinder has stopped moving and cannot be used as a dynamic brake.
The clamp is spring-applied and air-released via a third G1/8 port. You must balance the air pressures on both sides of the piston before unlocking, otherwise the rod can jump abruptly. An independent safety measure is required for human safety.
Related AirTAC Lock & Standard Cylinders
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