Airtac BSAI Locking Clamp Cylinder BSAI40X175S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI40X175S is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 175mm 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
- Stroke175 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 BSAI40X175S
The AirTAC BSAI40X175-S is a double-acting ISO 15552 profile cylinder equipped with a built-in clamp-lock mechanism. A spring-applied, air-released gripper clamps the 16mm carbon steel piston rod to secure the load at ANY position along its 175mm travel, delivering a static holding force of 900 N. Because it is a profile cylinder, it is dimensionally interchangeable per ISO 15552 mounting interfaces, while the integrated clamp head adds length beyond the base unit. The -S suffix indicates an integrated magnet for precise position sensing with AirTAC CMSE (reed) or DMSE (electronic) switches.
It is crucial to distinguish this 900 N static holding force from the cylinder's dynamic thrust, which provides 628 N push and 528 N pull at 0.5 MPa. The variable air cushions at the stroke ends only decelerate the piston; they do not hold the load. The clamp itself is bidirectional and operates via a dedicated G1/8 enclasp port, requiring a balanced 0.15-0.7 MPa air pressure to release the grip safely.
Airtac BSAI Locking Clamp Cylinder BSAI40X175S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI40X175S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 175 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 BSAI40X175S Is Used
Vertical Axis Holding
Secures a 40mm bore lifting payload at any intermediate height along the 175mm stroke, preventing gravity-driven drops during air loss.
Emergency Drop Prevention
Engages a 900 N bidirectional clamp instantly upon pressure loss to freeze the rod mid-stroke, protecting operators and workpieces.
Machining Position Lock
Locks the carbon steel rod rigidly at a custom machining coordinate, ensuring the workpiece stays completely stationary without relying on live air pressure.
Is the Airtac BSAI Locking Clamp Cylinder BSAI40X175S the Right Clamp-Lock?
Choose this 40mm bore when an application requires intermediate position holding that a SAIL cylinder cannot provide, as SAIL only locks at stroke ends. If your load requires less holding power, stepping down to a 32mm bore offers 600 N holding force and 402 N push thrust at 0.5 MPa. If your static load exceeds 900 N, stepping up to a 50mm bore provides 1400 N holding force and 982 N thrust. For tasks needing no intermediate locking, a plain SAI cylinder suffices. Always size the holding force against the static load, not the thrust. The clamp locks only after the rod has stopped; it cannot brake a moving rod. Furthermore, it must be unlocked with balanced air pressures on both sides of the piston, or the rod may jump abruptly. For safety-critical applications, an independent external safety measure is required. This configuration features PT tapered ports, a standard 1/4 cylinder port, and accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, or TCM2 mounts.
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 BSAI40X175S FAQ
The BSAI40X175-S provides a static holding force of 900 N. The spring-applied clamp grips the 16mm rod at any position along the 175mm stroke, holding the load securely without requiring continuous live air pressure.
The clamp unlocks only when the air pressures on both sides of the piston are balanced and the cylinder has stopped. Applying 0.15-0.7 MPa to the G1/8 enclasp port releases the spring-loaded grip. Releasing it with unbalanced pressures can cause the rod to jump abruptly.
Related AirTAC Lock & Standard Cylinders
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