Airtac BSAI Locking Clamp Cylinder BSAI50X50
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X50 is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 50mm 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
- Stroke50 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 BSAI50X50
The AirTAC BSAI50X50 is a double-acting ISO 15552 profile cylinder with a built-in clamp-lock mechanism. A spring-applied, air-released gripper clamps the 20mm carbon steel piston rod, securing the load at any position along the 50mm stroke with a static holding force of 1400 N. It delivers 982 N of thrust at 0.5 MPa, but buyers must distinguish between thrust and holding force: thrust moves the load, while the 1400 N clamp rating dictates what the cylinder can statically hold without live pressure.
The clamp operates via a third G1/8 enclasp port, separate from the 1/4 cylinder ports, and requires 0.15-0.7 MPa to release. The integrated variable air cushion only decelerates the piston near stroke ends; it does not hold the load. The clamp locks only after the rod has stopped, meaning it cannot brake a moving load. Furthermore, unlocking requires balanced air pressure on both sides of the piston, or the rod may jump abruptly. The extruded aluminum barrel accepts CMSE reed and DMSE electronic sensors.
Airtac BSAI Locking Clamp Cylinder BSAI50X50 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X50 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 50 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 BSAI50X50 Is Used
Vertical Axis Hold
Secures a vertically lifted load at any point in the 50mm travel, preventing drops if air pressure is lost.
Mid-Stroke Machining
Locks the rod rigidly at a specific intermediate position for a machining or assembly operation.
Power Loss Safety
The spring-applied clamp engages instantly upon air loss to freeze the rod exactly where it stopped.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X50 the Right Clamp-Lock?
Choose this 50mm bore model for applications needing 982 N push thrust (0.5 MPa) and a 1400 N static hold within a compact 50mm stroke. If your load exceeds 1400 N, step up to the 63mm bore, which raises the holding force to 2200 N and thrust to 1559 N. If the load is lighter, the 40mm bore provides 628 N thrust and a 900 N hold. Select BSAI over a SAIL cylinder when you need the rod locked at any intermediate position, not just at stroke ends. If position holding is entirely unnecessary, a plain SAI cylinder suffices.
When replacing a unit, match the single-rod configuration, 50mm stroke, PT tapered port threads, and 20mm M16x1.5 rod thread. The 20mm rod handles side loads well, but external guidance is recommended for precise alignment. Mounting options include Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2. For safety-critical holds, note that the clamp locks only after the rod stops and requires balanced pressure to unlock safely; add an independent safety measure for human-safety loads.
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 BSAI50X50 FAQ
The clamp-lock provides a static holding force of 1400 N. It is bidirectional, holding the load securely at any position along the 50mm stroke, whether the rod was extending or retracting.
No, the clamp locks only after the cylinder has stopped. It cannot brake a moving rod. Additionally, unlocking requires balanced air pressure on both sides of the piston to prevent the rod from jumping abruptly.
Related AirTAC Lock & Standard Cylinders
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