Airtac BSAI Locking Clamp Cylinder BSAI50X800
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X800 is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 800mm 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
- Stroke800 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 BSAI50X800
The AirTAC BSAI50X800 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 piston rod at any position along its 800 mm travel, delivering a static holding force of 1400 N. Operating within a 0.15 to 0.7 MPa range, the base cylinder generates 982 N of thrust at 0.5 MPa. It is crucial to distinguish this 1400 N holding force from the cylinder's thrust; the clamp's job is to maintain a static load without live pressure, not to propel the rod.
This bidirectional enclasp mechanism grips the rod securely regardless of whether it was extending or retracting, but it only engages after the piston has stopped, meaning it cannot brake a moving load. Unlocking requires balanced air pressure across the piston via the dedicated G1/8 enclasp port, preventing abrupt rod jumps upon release. The variable air cushions at stroke ends only decelerate the moving mass; they do not hold the load. For position feedback, an optional -S magnet version pairs with AirTAC CMSE reed and DMSE solid-state sensors.
Airtac BSAI Locking Clamp Cylinder BSAI50X800 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X800 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 800 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 BSAI50X800 Is Used
Vertical Axis Drop Prevention
Holds a 1400 N load securely at any point on a vertical lift the moment air pressure is removed, preventing gravity-driven falls.
Power Outage Safety Hold
Maintains the exact mid-stroke position of an 800 mm travel axis during sudden power loss, keeping workpieces stable until pressure is restored.
Machining Position Lock
Clamps the rod rigidly at a specific intermediate location for machining or inspection processes, ensuring no deflection during the operation.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X800 the Right Clamp-Lock?
Choose this 50 mm bore when an application requires intermediate positioning and drop prevention along a long 800 mm stroke. If less holding capacity is needed, the 40 mm bore offers 528 N thrust and 900 N holding force; for heavier loads, the 63 mm bore provides 1402 N thrust and 2200 N hold. This lock-anywhere capability makes BSAI superior to SAIL, which only secures at stroke ends, whereas a plain SAI suffices if no mid-stroke holding is required. Because the 800 mm stroke is long and the rod is unsupported, an external guide is strongly recommended to prevent side-load damage to the 20 mm rod and M16x1.5 thread.
Replacement requires a single-rod, 50 mm bore, 800 mm stroke cylinder with PT tapered ports. The cylinder ports are 1/4 inch, and the enclasp port is G1/8. Compatible mounts include Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2. For safety-critical loads, note that the clamp locks only after stopping and requires an additional independent safety measure.
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 BSAI50X800 FAQ
The clamp-lock provides a static holding force of 1400 N. It is a spring-applied, air-released mechanism that grips the rod at any position, but only after the cylinder has stopped moving.
The clamp is released by applying 0.15 to 0.7 MPa of air to the dedicated G1/8 enclasp port, but only after the air pressures on both sides of the piston are balanced. Releasing without balanced pressure can cause the rod to jump abruptly.
Related AirTAC Lock & Standard Cylinders
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