Airtac BSAI Locking Clamp Cylinder BSAI50X100
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X100 is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 100mm 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
- Stroke100 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 BSAI50X100
The AirTAC BSAI50X100 is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock. It delivers 982 N of push thrust at 0.5 MPa, but the defining feature is its ability to lock the piston rod at any position along its 100 mm travel. A static holding force of 1400 N secures the load mechanically, functioning independently of the pneumatic thrust. You must size this holding capacity against your static load weight, as the clamp force and cylinder thrust are two entirely separate quantities.
This bidirectional enclasp grips the 20 mm rod whether it was extending or retracting, but locks only after the cylinder has stopped moving—it cannot brake a moving load. The mechanism requires a third G1/8 unlock port (separate from the 1/4 cylinder ports) and 0.15-0.7 MPa operating pressure. Note that the variable air cushions only decelerate the piston near stroke ends; the clamp is the sole device responsible for holding the load in place.
Airtac BSAI Locking Clamp Cylinder BSAI50X100 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X100 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 100 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 BSAI50X100 Is Used
Vertical Axis Hold
Prevents gravity-driven drops on vertical lifts by clamping the 20 mm rod at any intermediate position during a sudden air loss.
Emergency Stop Safety
Secures a stopped load anywhere in the 100 mm travel during power outages, though an independent safety measure is required for human safety.
Machining Position Lock
Holds a workpiece rigidly at a custom mid-stroke position for machining or inspection, utilizing the 1400 N static grip instead of live air pressure.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X100 the Right Clamp-Lock?
Choose this 50 mm bore when a standard SAI cylinder lacks drop protection and a SAIL stroke-end lock is insufficient because you need to hold the load mid-travel. If your static load is lighter, the 40 mm bore offers 528 N pull thrust and a 900 N hold; for heavier suspended loads, stepping up to the 63 mm bore provides 1402 N pull thrust and a 2200 N hold. Always verify your static load against the 1400 N holding force, not the thrust.
The clamp locks after the rod stops and must be unlocked with balanced air pressures on both sides of the piston, or the rod may jump abruptly. Safety-critical applications require an independent external measure. As a direct replacement, match the single-rod design, 50 mm bore, 100 mm stroke, PT ports, and the BSAI mounting set (Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, TCM2). The standard carbon steel rod handles side loads well, but long unsupported strokes still need external guidance. This unit lacks a magnet, so position sensing via CMSE or DMSE switches is not supported.
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 BSAI50X100 FAQ
The BSAI50X100 provides a static holding force of 1400 N. Its spring-applied clamp can lock the rod at any position along the 100 mm stroke, unlike a SAIL cylinder which only holds at stroke ends.
The clamp engages only after the cylinder has stopped; it cannot brake a moving rod. To unlock it safely, you must apply balanced air pressure to both sides of the piston via the G1/8 unlock port, otherwise the rod may move abruptly.
Related AirTAC Lock & Standard Cylinders
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