Airtac BSAI Locking Clamp Cylinder BSAI50X175S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X175S is a genuine double-acting ISO 15552 cylinder with a Ø50mm 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 1400 N.
- BoreØ50 mm
- Stroke175 mm
- Cylinder portG1/4
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM16×1.5
- 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 BSAI50X175S
The AirTAC BSAI50X175-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock mechanism. It secures the carbon steel piston rod at any position along its 175 mm travel, delivering a static holding force of 1400 N. Because it features a built-in magnet, it integrates seamlessly with AirTAC CMSE reed and DMSE electronic sensors for precise position feedback.
It is crucial to distinguish this 1400 N holding force from the cylinder thrust, which is 982 N push and 825 N pull at 0.5 MPa. The variable air cushion only decelerates the piston near the stroke ends; the dedicated clamp is what actually holds the load. Furthermore, unlocking requires balanced air pressure on both sides of the piston via the G1/8 enclasp port, preventing abrupt rod movement upon release.
Airtac BSAI Locking Clamp Cylinder BSAI50X175S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X175S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 175 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G1/4 |
| Rod thread | M16×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 1400 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 1000 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 (Ø50 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa (max) | 1374 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (1400 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI50X175S Is Used
Vertical Axis Hold
Prevents gravity-driven drops on vertical lifts by clamping the rod securely at any height during operation or an unexpected power loss.
Mid-Stroke Machining
Locks the workpiece at a precise intermediate point along the 175 mm travel for drilling or inspection without cycling to the end.
Emergency Safety Hold
Acts as a fail-safe brake that engages after the cylinder stops, holding loads securely with 1400 N of force when air pressure drops.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X175S the Right Clamp-Lock?
Select this 50 mm bore when an application demands 982 N of thrust at 0.5 MPa combined with a 1400 N static hold at any intermediate stroke position. If your load only needs to be secured at the fully extended or retracted end of travel, a SAIL stroke-end lock is sufficient, making the BSAI the superior choice for mid-stroke machining or inspection stops. For lighter loads, the 40 mm bore offers 628 N thrust and 900 N holding force.
This single-rod configuration uses PT tapered ports (1/4 inch cylinder port, G1/8 enclasp port) and accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. The M16x1.5 rod thread provides robust side-load resistance. Remember that the clamp locks only after the rod has stopped, so human-safety applications require an independent external 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 BSAI50X175S FAQ
The spring-applied clamp-lock provides a static holding force of 1400 N. It engages only after the cylinder has stopped and can hold the load at any position along the 175 mm stroke.
The clamp is released by applying 0.15-0.7 MPa of air pressure to the G1/8 enclasp port. The cylinder pressures must be balanced before unlocking, otherwise the rod may move abruptly upon release.
Related AirTAC Lock & Standard Cylinders
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