Airtac BSAI Locking Clamp Cylinder BSAI50X175
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X175 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 BSAI50X175
The AirTAC BSAI50X175 is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock. It provides a static holding force of 1400 N at any position along its 175 mm stroke. Operating at 0.5 MPa, it delivers 982 N of thrust, but remember that holding force and thrust are separate metrics: you must size the 1400 N clamp capacity against your static load, not the cylinder's push force.
This enclasp mechanism engages bidirectionally to secure the load whether the rod was extending or retracting. It requires a third G1/8 unlock port alongside the 1/4 cylinder ports, and it releases only when air pressures are balanced. The variable air cushion decelerates the piston near stroke ends, but the clamp is what truly holds the load.
Airtac BSAI Locking Clamp Cylinder BSAI50X175 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X175 |
|---|---|
| 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 BSAI50X175 Is Used
Vertical Axis Hold
Prevents a 50 mm bore vertical load from dropping under gravity by clamping the rod at any intermediate height during operation.
Power Loss Safety
Engages instantly upon air pressure loss to freeze the piston safely in place mid-stroke, protecting operators and workpieces.
Machining Position Lock
Secures the workpiece at a precise intermediate stroke point for drilling or inspection, ensuring vibration-free holding.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X175 the Right Clamp-Lock?
Select this 50 mm bore when a SAIL end-lock is insufficient because you need the rod gripped mid-travel. If you need less force, the 40 mm bore offers 528 N thrust and 900 N holding force; for heavier loads, the 63 mm bore provides 1402 N thrust and 2200 N holding force. If position holding is never required, a plain SAI cylinder suffices.
Honest holding limits apply: the clamp locks only after the rod has stopped and cannot brake a moving load. It must be unlocked with balanced pressures to prevent the rod from jumping abruptly. For safety-critical applications, add an independent safety measure. This PT-port model uses Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, or TCM2 mounts. The 20 mm carbon steel rod with an M16x1.5 thread handles side loads well, though long unsupported strokes need an external guide.
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 BSAI50X175 FAQ
The BSAI50X175 provides a static holding force of 1400 N. This bidirectional clamp locks the rod at any position along the stroke, but it only engages after the cylinder has stopped moving.
The clamp is released by supplying air to the G1/8 enclasp port. To prevent the rod from jumping abruptly, the air pressures on both sides of the piston must be balanced before unlocking.
Related AirTAC Lock & Standard Cylinders
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