Airtac BSAI Locking Clamp Cylinder BSAI50X450S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X450S is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 450mm 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
- Stroke450 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 BSAI50X450S
The AirTAC BSAI50X450-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock. It delivers 982N of thrust at 0.5 MPa and features a carbon steel single rod. The integrated enclasp mechanism grips the rod securely at any position along its 450mm travel, providing a static holding force of 1400N. This holding capacity is a distinct metric from the cylinder's thrust; you must size the clamp force against your static load rather than relying on the 982N push force to maintain position.
This unit includes a -S magnet for position sensing with AirTAC CMSE reed or DMSE solid-state switches. It is critical to understand that the variable air cushion only decelerates the piston near the stroke ends—it does not hold the load. The clamp requires a third G1/8 PT enclasp port to release, operating within a balanced pressure range of 0.15-0.7 MPa. The clamp locks only after the rod has completely stopped and cannot act as a dynamic brake.
Airtac BSAI Locking Clamp Cylinder BSAI50X450S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X450S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 450 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 BSAI50X450S Is Used
Vertical Load Holding
Maintains a 1400N vertical hold at any intermediate height without relying on continuous air pressure.
Power-Out Safety
Spring-applied clamp immediately grips the 20mm rod to prevent gravity falls during an air supply failure.
Machining Position Lock
Secures a workpiece rigidly at a custom 450mm extension for stable machining or inspection tasks.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X450S the Right Clamp-Lock?
Choose this 50mm bore if your application requires 982N of thrust alongside a 1400N static hold. If your load requires less force, stepping down to a 40mm bore provides 628N thrust and a 900N hold. If you only need to hold the load at the stroke end rather than mid-travel, a plain SAIL cylinder is simpler and more cost-effective. For this 450mm stroke, the 20mm carbon steel rod and M16x1.5 thread provide good side-load resistance, but an external guide is recommended for long unsupported loads. Replacement requires a single-rod, 50x450mm configuration with PT ports, a -S magnet, and the BSAI mounting set (Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, TCM2).
Always operate the clamp safely: it engages only after the cylinder stops, and it must be unlocked with balanced air pressures on both sides of the piston. Failing to balance the pressure before unlocking can cause the rod to jump abruptly. For safety-critical loads that risk human injury, an additional independent mechanical safety measure is required.
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 BSAI50X450S FAQ
The clamp-lock provides a static holding force of 1400N. It engages via a spring mechanism and grips the rod at any position along the stroke, holding the load securely without live air pressure.
The clamp locks only after the cylinder has stopped moving; it cannot brake a dynamic rod. To release it safely, air pressure must be balanced on both sides of the piston via the G1/8 enclasp port, otherwise the rod may jump abruptly upon release.
Related AirTAC Lock & Standard Cylinders
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