Airtac BSAI Locking Clamp Cylinder BSAI50X150
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X150 is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 150mm 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
- Stroke150 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 BSAI50X150
The AirTAC BSAI50X150 is a double-acting ISO 15552 profile cylinder with a built-in spring-applied, air-released clamp-lock. It provides a static holding force of 1400 N at any position along its 150 mm stroke. Delivering 982 N of push thrust at 0.5 MPa (1374 N at the 0.7 MPa maximum), it is crucial to distinguish this holding force from thrust: the clamp resists an external static load independently of the cylinder's motive power, so you must size the 1400 N rating against your load, not the thrust.
This enclasp mechanism clamps the 20 mm carbon steel rod bidirectionally, whether the rod was extending or retracting. It is fundamentally different from the variable air cushion, which only decelerates the piston near the stroke end; the clamp is what actually secures the load. The lock engages only after the rod has stopped and cannot brake a moving actuator. Release requires feeding the separate G1/8 enclasp port with 0.15-0.7 MPa after balancing pressures on the 1/4 cylinder ports, preventing abrupt rod jumps.
Airtac BSAI Locking Clamp Cylinder BSAI50X150 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X150 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 150 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 BSAI50X150 Is Used
Vertical Axis Holding
Secures a raised vertical load at any point in the 150 mm travel, preventing gravity-driven drops during an air pressure loss without needing end-of-stroke contact.
Emergency Power-Loss Hold
Engages its 1400 N clamp instantly when supply pressure drops, freezing the carbon steel rod safely in place wherever it stopped along the stroke.
Machining Position Lock
Locks the workpiece at a precise intermediate location for drilling or inspection, ensuring the 20 mm rod remains rigidly clamped against lateral cutting forces.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X150 the Right Clamp-Lock?
Select this 50 mm bore when a mid-range actuator must hold position mid-stroke without relying on continuous air pressure. If the 1400 N holding capacity or 982 N thrust at 0.5 MPa is insufficient, step up to the 63 mm bore (1402 N thrust, 2200 N holding force). If you only need to secure the load at the stroke ends, a plain SAIL cylinder suffices; choose the BSAI specifically for its lock-anywhere capability. For simple movement without holding, a standard SAI is adequate.
For replacement, match the 50 mm bore, 150 mm stroke, PT ported single rod, and the correct mounting set (Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, TCM2). Because no magnet is specified, position sensing requires adding a separate external sensor or confirming a compatible switch. Always ensure the cylinder has stopped before locking, and add an independent safety measure for human-safety-critical holds. The 20 mm rod thread handles side loads well, but at 150 mm stroke, external guidance is still recommended for heavy offsets.
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 BSAI50X150 FAQ
The BSAI50X150 provides a static holding force of 1400 N. The spring-applied clamp engages at any position along the 150 mm stroke to hold the load securely without continuous air pressure.
The lock only engages after the cylinder has stopped and cannot brake a moving rod. To release it safely, you must balance the air pressures on both sides of the piston before applying 0.15-0.7 MPa to the G1/8 unlock port, which prevents the rod from jumping abruptly.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac BSAI Locking Clamp Cylinder BSAI50X150
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.