Airtac BSAI Locking Clamp Cylinder BSAI40X1000S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI40X1000S is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 1000mm 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
- Stroke1000 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 BSAI40X1000S
The AirTAC BSAI40X1000-S is a double-acting ISO 15552 profile cylinder equipped with a built-in clamp-lock mechanism. It features a carbon steel single-rod and a magnet for CMSE or DMSE sensors. A spring-applied, air-released gripper clamps the 16mm rod to hold a load securely at any position along its 1000mm travel, delivering a static holding force of 900 N. The cylinder operates at 0.15-0.7 MPa, generating 628 N of thrust at 0.5 MPa, but you must size the load against the 900 N holding force, not the thrust, because holding and thrust are separate quantities.
This model uses a third G1/8 enclasp port—separate from the 1/4 PT cylinder ports—to release the lock. Remember that the variable air cushion only decelerates the piston near stroke end; the clamp is what actually holds the load. Because this is a 1000mm stroke, the extended rod needs an external guide to prevent excessive side-loading. The clamp locks only after the rod stops, so it cannot brake a moving load.
Airtac BSAI Locking Clamp Cylinder BSAI40X1000S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI40X1000S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 1000 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 BSAI40X1000S Is Used
Vertical Axis Position Hold
Locks a 900 N load securely at any height on a vertical axis, preventing drops when air pressure is removed.
Mid-Stroke Machining Hold
Clamps the 16mm carbon steel rod anywhere along the 1000mm stroke to rigidly secure a workpiece during processing.
Power Loss Safety Stop
Spring-applied enclasp engages instantly upon air loss to freeze the cylinder in its current position.
Is the Airtac BSAI Locking Clamp Cylinder BSAI40X1000S the Right Clamp-Lock?
Choose this 40mm bore if you need 628 N of thrust at 0.5 MPa and 900 N of static holding anywhere in a 1000mm travel. If you need more force, stepping up to a 50mm bore gives 982 N thrust and 1400 N holding force. If your application only needs to hold at the stroke end, a SAIL cylinder is simpler, but choose this BSAI when you must enclasp the rod mid-stroke. A plain SAI cylinder suffices if no locking is needed.
For safe operation, unlock the clamp only when pressures on both sides of the piston are balanced, or the rod may jump abruptly. Safety-critical loads require an additional independent safety measure. As a replacement, match the single-rod, 40mm bore, 1000mm stroke, PT ports, and the -S magnet. The correct mounting set is Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, or TCM2.
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 BSAI40X1000S FAQ
The clamp-lock provides a static holding force of 900 N. It locks at any position along the 1000mm stroke, but only engages after the cylinder has stopped moving.
The lock is released via a third G1/8 enclasp port, but only after the air pressures on both sides of the piston are balanced. Releasing it under unbalanced pressure can cause the rod to jump abruptly.
Related AirTAC Lock & Standard Cylinders
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