Airtac BSAI Locking Clamp Cylinder BSAI40X200
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI40X200 is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 200mm 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
- Stroke200 mm
- Cylinder portG1/4
- TypeSingle rod (BSAI)
- 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 BSAI Locking Clamp Cylinder BSAI40X200
The AirTAC BSAI40X200 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock mechanism. A defining characteristic of this series is its ability to lock the piston rod at any position along the 200 mm stroke, providing a static holding force of 900 N. The cylinder itself delivers 628 N of push thrust and 528 N of pull thrust at 0.5 MPa, operating efficiently within a 0.15-0.7 MPa pressure range.
It is crucial to distinguish between the cylinder thrust and the clamp holding force; the 900 N rating dictates the static load capacity when locked, entirely separate from the pneumatic thrust used for movement. This holding power comes from a dedicated enclasp port (G1/8) that releases the grip, operating alongside the standard 1/4 PT cylinder ports. Remember that the variable air cushions only decelerate the piston near stroke ends, while the clamp mechanism is solely responsible for maintaining the load position.
Airtac BSAI Locking Clamp Cylinder BSAI40X200 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI40X200 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 200 mm |
| Type | Single rod (BSAI), 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 | — |
Push/pull as tabulated. 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 BSAI Locking Clamp Cylinder BSAI40X200 Is Used
Vertical Load Holding
Maintains vertical workpieces at any midpoint elevation with a 900 N static hold, preventing gravity-induced drops during air pressure loss.
Machining Position Lock
Secures a part rigidly in a specific stroke position for drilling or milling, ensuring the workpiece does not shift under vibration.
Emergency Stop Hold
Arrests movement and holds the load safely in place anywhere along the 200 mm travel when the pneumatic system is unexpectedly de-energized.
Is the Airtac BSAI Locking Clamp Cylinder BSAI40X200 the Right Clamp-Lock?
Select this 40 mm bore model when an application requires intermediate stroke holding that a stroke-end lock (like SAIL) cannot provide; if locking is entirely unnecessary, a plain SAI cylinder suffices. If your load demands greater clamping security, stepping up to the 50 mm bore yields a 1400 N holding force and 982 N thrust, whereas dropping to the 32 mm bore reduces the hold to 600 N.
When integrating this cylinder, note that the clamp locks only after the rod has completely stopped and cannot act as a brake for a moving load. It must be unlocked with balanced air pressures on both sides of the piston to prevent the rod from jumping abruptly. This single-rod configuration accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts, uses PT port threads, and lacks a standard sensor magnet.
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 BSAI Locking Clamp Cylinder BSAI40X200 FAQ
The BSAI40X200 provides a static holding force of 900 N. The spring-applied clamp engages at any position along the 200 mm stroke to hold the load securely without requiring continuous live air pressure.
The clamp must be released by applying air to the G1/8 enclasp port only after the pressures on both sides of the piston are balanced. If pressures are not balanced, the rod can move abruptly upon unlocking, so an external safety measure is required for human-safe applications.
Related AirTAC Lock & Standard Cylinders
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