Airtac BSAI Locking Clamp Cylinder BSAI50X200S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X200S is a genuine double-acting ISO 15552 cylinder with a Ø50mm 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 1400 N.
- BoreØ50 mm
- Stroke200 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 BSAI50X200S
The AirTAC BSAI50X200-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock. It secures the carbon steel piston rod at any position along its 200 mm travel, providing a static holding force of 1400 N. Because it is a single-rod design, the push thrust at 0.5 MPa is 982 N and the pull thrust is 825 N. You must size the 1400 N holding capacity against your static load weight, as the clamp holding force is a separate quantity from the cylinder thrust.
This unit includes a -S magnet for precise position sensing via AirTAC CMSE (reed) and DMSE (electronic) switches. A third G1/8 enclasp port supplies air to release the brake, while the main cylinder ports are PT 1/4. Remember that the variable air cushions only decelerate the piston near stroke ends; the mechanical clamp is what actually holds the load. Operating pressure spans 0.15-0.7 MPa, and the lock engages only after the rod has stopped moving.
Airtac BSAI Locking Clamp Cylinder BSAI50X200S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X200S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 200 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 BSAI50X200S Is Used
Vertical Axis Hold
Prevents gravity-driven drops on vertical lifts by clamping the rod securely at any point in the 200 mm travel during air loss.
Emergency Stop Safety
Locks the load exactly where it stopped after an E-stop, maintaining a 1400 N static hold without requiring continuous live air pressure.
Machining Positioning
Freezes a workpiece at a specific mid-stroke coordinate for machining or inspection, ensuring the part does not shift under tooling pressure.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X200S the Right Clamp-Lock?
Choose this 50 mm bore when a load needs to be frozen mid-stroke rather than just at the end, which is the primary advantage over an AirTAC SAIL stroke-end lock. If your application only requires basic movement without holding, a plain SAI cylinder is sufficient. Stepping down to a 40 mm bore drops the holding force to 900 N and thrust to 628 N, while stepping up to a 63 mm bore raises holding force to 2200 N and thrust to 1559 N.
When replacing this unit, match the single-rod layout, 50 mm bore, 200 mm stroke, and PT 1/4 ports. The correct mounting set is Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, or TCM2. The 20 mm rod and M16x1.5 thread offer robust side-load capacity, but always ensure balanced air pressure on both sides of the piston before unlocking, or the rod may jump abruptly. For human-safety critical holds, install 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 BSAI50X200S FAQ
The spring-applied clamp-lock provides a static holding force of 1400 N. It engages bidirectionally at any position along the 200 mm stroke, but only after the piston rod has come to a complete stop.
The lock is released by supplying air to the G1/8 enclasp port, but you must first balance the air pressure on both sides of the piston. If pressures are not balanced, the rod can move abruptly upon release, posing a hazard.
Related AirTAC Lock & Standard Cylinders
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