Airtac BSAI Locking Clamp Cylinder BSAI50X500S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X500S is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 500mm 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
- Stroke500 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 BSAI50X500S
The AirTAC BSAI50X500-S is a double-acting ISO 15552 profile cylinder featuring a built-in spring-applied, air-released clamp-lock. It secures the 20 mm carbon steel rod at any position along its 500 mm stroke, delivering a static holding force of 1400 N. Operating at 0.15-0.7 MPa, it generates 982 N of push thrust at 0.5 MPa. Remember that holding force and thrust are distinct metrics: you must size the 1400 N clamp capacity against your static load, not the 982 N cylinder thrust.
This unit includes a -S magnet for CMSE reed and DMSE solid-state sensors, plus a third G1/8 enclasp port for unlocking. The variable air cushion only decelerates the piston near stroke ends; the clamp is what truly holds the load. Furthermore, the clamp locks only after the rod stops and cannot brake a moving rod.
Airtac BSAI Locking Clamp Cylinder BSAI50X500S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X500S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 500 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 BSAI50X500S Is Used
Vertical Lift Holding
Maintains vertical loads securely at any intermediate height without relying on continuous air pressure.
Power Loss Safety
Spring-applied clamp engages automatically during air pressure loss to freeze the rod exactly where it stopped.
Machining Position Lock
Freezes the workpiece rigidly in place for drilling or inspection, ensuring the cushion does not bear the cutting load.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X500S the Right Clamp-Lock?
Choose this 50 mm bore when a load must be held mid-stroke; if you only need end-of-stroke holding, a SAIL cylinder suffices, and if no lock is needed, a plain SAI works. If 982 N thrust or 1400 N hold is insufficient, step up to the 63 mm bore (1559 N thrust, 2200 N hold). If you need less force, the 40 mm bore offers 628 N thrust and 900 N hold. The clamp locks only after the rod stops and requires balanced pressure to unlock, or the rod may jump abruptly; safety-critical applications need an independent backup measure.
This replacement match features a single rod, 500 mm stroke, PT tapered ports (1/4 inch cylinder port, G1/8 enclasp port), and a -S magnet. It accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, or TCM2 mounts. Because the 500 mm stroke is long and unsupported, an external guide is recommended to prevent side-load damage to the M16x1.5 rod thread.
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 BSAI50X500S FAQ
It provides a static holding force of 1400 N. The clamp locks the rod at any position bidirectionally, but it only engages after the cylinder has stopped moving.
The clamp unlocks via a third G1/8 enclasp port, but only when air pressures on both sides of the piston are balanced. Releasing it unbalanced causes the rod to jump abruptly.
Related AirTAC Lock & Standard Cylinders
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