Airtac BSAID Clamp Cylinder BSAID40X400
The AirTAC Airtac BSAID Clamp Cylinder BSAID40X400 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 BSAID40X400
The AirTAC BSAID40X400 is a double-acting ISO 15552 extruded aluminum profile cylinder featuring a double-rod design and an integrated clamp-lock mechanism. A spring-applied, air-released gripper secures the piston rod at any position along its 400 mm travel, delivering a static holding force of 900 N. Because it is a double-rod unit, the thrust is equal in both directions at 528 N (0.5 MPa), and the second rod allows you to mount a position flag or counterweight on the opposite end while the workpiece attaches to the primary side.
It is vital to distinguish this 900 N holding force from the 528 N cylinder thrust: the clamp sustains static loads independently of the pneumatic drive, so you must size the clamp against the load weight, not the thrust. The clamp uses a separate G1/8 enclasp port alongside the 1/4 cylinder ports to release the rod. Remember that the variable air cushions only decelerate the piston near stroke ends; the mechanical clamp is what actually holds the load in place.
Airtac BSAID Clamp Cylinder BSAID40X400 Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID40X400 |
|---|---|
| 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 BSAID40X400 Is Used
Vertical Mid-Stroke Hold
Secures a vertically lifted payload at any elevation along the 400 mm travel, preventing gravity-driven drops during an air pressure loss.
Machining Position Lock
Clamps a dual-sided workpiece fixture rigidly in place for intermediate machining or inspection operations without relying on pneumatic pressure.
Dual-Side Safety Hold
Uses the second rod for a counterweight while the clamp safely freezes the assembly mid-cycle during emergency stops.
Is the Airtac BSAID Clamp Cylinder BSAID40X400 the Right Clamp-Lock?
Choose this BSAID40X400 when you need a double-rod configuration with mid-stroke holding, such as dual-side guidance or mounting a secondary tool opposite the primary workpiece. If your application only requires holding at the fully extended or retracted stroke end, a SAIL cylinder is a simpler choice, while a plain SAID suffices if no clamp is needed. If 528 N thrust or 900 N holding force is insufficient, stepping up to the 50 mm bore yields 825 N thrust and 1400 N holding force.
The clamp locks only after the rod has stopped moving; it cannot brake a moving load. Unlocking requires balanced air pressure on both piston sides (operating range 0.15-0.7 MPa), or the rod may jump abruptly. For safety-critical applications, add an independent external safety measure. This model uses PT ports, accepts Basic, FA, LB, TC, TCM1, or TCM2 mounts (omitting FB/CA/CB/CR), and because sensors are not specified, it ships without a magnet for CMSE or DMSE switches. At 400 mm stroke, the 16 mm rod needs external guide support to prevent side-load wear.
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 BSAID40X400 FAQ
The 900 N static holding force is the mechanical clamp's capacity to hold a stationary load at any position, which is separate from the 528 N pneumatic thrust used to move the load. You must size the clamp against the static load weight.
No, the clamp locks only after the cylinder has stopped; it cannot brake a moving rod. It must be unlocked with balanced air pressures on both sides, or the rod may jump. Safety-critical loads require an independent external safety measure.
Related AirTAC Lock & Standard Cylinders
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