Airtac BSAI Locking Clamp Cylinder BSAI40X200S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI40X200S 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 BSAI40X200S
The AirTAC BSAI40X200-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock mechanism. It delivers 628N of thrust at 0.5MPa and features a carbon steel single rod. Unlike a stroke-end lock, this enclasp gripper clamps the rod to hold a static load securely at ANY position along its 200mm travel, providing a documented 900N static holding force. You must size the holding force against your static load, as the 900N clamp rating is entirely separate from the 628N cylinder thrust.
This model includes a -S magnet for precise position sensing with AirTAC CMSE (reed) or DMSE (electronic) switches. The clamp operates via a dedicated G1/8 enclasp port, distinct from the 1/4 cylinder ports, and requires 0.15-0.7MPa to release. Remember that the variable air cushion only decelerates the piston near stroke ends; the mechanical clamp is the sole device responsible for holding the load.
Airtac BSAI Locking Clamp Cylinder BSAI40X200S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI40X200S |
|---|---|
| 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 BSAI40X200S Is Used
Mid-Stroke Vertical Hold
Locks a lowered load securely at any intermediate height along the vertical axis without relying on continuous air pressure.
Emergency Drop Prevention
The spring-applied clamp engages automatically upon air loss to freeze the rod exactly where it stopped traveling.
Machining Position Freeze
Holds a workpiece completely stationary at a custom stroke position for drilling or inspection operations.
Is the Airtac BSAI Locking Clamp Cylinder BSAI40X200S the Right Clamp-Lock?
Choose this 40mm bore when an application requires intermediate stopping, whereas a plain SAI suffices if you only need standard movement, or a SAIL if holding exclusively at stroke ends is acceptable. If your load demands a higher intermediate hold, stepping up to the 50mm bore provides a 1400N holding force and 982N thrust at 0.5MPa. Conversely, lighter duties can use the 32mm bore with its 600N hold and 402N thrust. This BSAI40X200-S is a direct single-rod replacement matching 40mm bore, 200mm stroke, PT tapered ports, and the -S magnet option.
It supports Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. The 16mm rod with an M12x1.25 thread handles side loads well, but the clamp locks only AFTER the cylinder has stopped; it cannot brake a moving rod. Furthermore, you must unlock it with balanced pressures on both sides of the piston, or the rod may jump abruptly. For safety-critical loads, always employ an additional independent safety measure.
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 BSAI40X200S FAQ
The BSAI40X200-S provides a 900N static holding force via its bidirectional clamp-lock, meaning it can hold the load securely at any position along the 200mm stroke, regardless of whether the rod was extending or retracting.
The clamp locks only after the cylinder has stopped moving; it is not a braking device. To unlock it safely, you must balance the air pressures on both sides of the piston via the G1/8 enclasp port, otherwise the rod may move abruptly upon release.
Related AirTAC Lock & Standard Cylinders
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