Airtac BSAID Clamp Cylinder BSAID40X25
The AirTAC Airtac BSAID Clamp Cylinder BSAID40X25 is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 25mm 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
- Stroke25 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 BSAID40X25
The AirTAC BSAID40X25 is a double-acting ISO 15552 profile cylinder featuring a double-rod layout and an integrated spring-applied, air-released clamp-lock. It secures the piston rod at any point along its 25 mm travel, delivering a static holding force of 900 N. Because it is a double-rod unit, the thrust is identical in both directions, providing 528 N of force at 0.5 MPa. Buyers must distinguish between this clamp holding force and the cylinder thrust: the 900 N rating dictates the static load capacity when locked, whereas the 528 N thrust drives the motion.
A rod extends from both ends, allowing you to mount a workpiece on one side and a guide, counterweight, or position flag on the opposite side for dual-side anti-rotation. The clamp is engaged via a dedicated G1/8 enclasp port, operating separately from the primary 1/4 inch cylinder ports. Remember that the variable air cushion only decelerates the piston near the stroke ends; the mechanical clamp is what actually holds the load.
Airtac BSAID Clamp Cylinder BSAID40X25 Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID40X25 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 BSAID40X25 Is Used
Vertical Lift Hold
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 firmly in place using the double-rod layout, absorbing machining vibrations without drift.
Mid-Stroke Safety Stop
Holds the extended tooling safely at any point in the 25 mm travel, ensuring the load remains stationary even if the main air supply fails.
Is the Airtac BSAID Clamp Cylinder BSAID40X25 the Right Clamp-Lock?
Select this 40 mm bore model when an application requires holding a load mid-stroke rather than just at the end, stepping up from a plain SAID40 if unpowered drift is unacceptable. If your static load exceeds the 900 N clamp capacity, move to the 50 mm bore, which offers 1400 N of holding force and 825 N of pull thrust at 0.5 MPa. Conversely, lighter loads could use the 32 mm bore with its 600 N hold. The BSAID40X25 beats a SAIL40 because it locks anywhere, not just at the stroke end.
For safe operation, the clamp locks only after the rod has completely stopped; it cannot brake a moving load. Unlocking requires balanced air pressure on both piston sides, or the rod may jump abruptly. Safety-critical applications need an independent external measure. This configuration uses PT port threads, a carbon steel rod, and accepts Basic, FA, LB, TC, TCM1, or TCM2 mounts (omitting FB/CA/CB/CR). No magnet is specified, so it will not work with CMSE or DMSE sensors.
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 BSAID40X25 FAQ
The clamp-lock provides a static holding force of 900 N. It engages via a spring and holds the double-rod at any position, functioning bidirectionally whether the rod was extending or retracting.
The clamp unlocks only when air pressure is balanced on both sides of the piston and the rod has stopped. Releasing it under unbalanced pressure can cause abrupt rod movement, so an independent safety measure is required for human-safety loads.
Related AirTAC Lock & Standard Cylinders
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