Airtac BSAI Locking Clamp Cylinder BSAI50X1000
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X1000 is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 1000mm 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
- Stroke1000 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 BSAI50X1000
The AirTAC BSAI50X1000 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock. It clamps the carbon steel piston rod at any position along its 1000 mm travel, delivering a static holding force of 1400 N. Because it is a profile cylinder with an extruded aluminum barrel, it is dimensionally interchangeable per ISO 15552 without relying on tie-rod construction. The cylinder generates 982 N of push thrust at 0.5 MPa (1374 N at the 0.7 MPa maximum operating pressure). It is crucial to recognize that the 1400 N holding force is a separate metric from the cylinder thrust; you must size the holding capacity against your static load, not the push thrust.
The lock engages bidirectionally but only after the rod has stopped, meaning it cannot brake a moving load. A third G1/8 enclasp port controls the unlock mechanism, which requires balanced air pressures on both sides of the piston to prevent the rod from jumping abruptly upon release. Furthermore, the variable air cushions at the stroke ends only decelerate the piston near the end of travel; they do not hold the load, as that is the sole job of the clamp. This model lacks a magnet (-S) and therefore does not support CMSE or DMSE position sensing.
Airtac BSAI Locking Clamp Cylinder BSAI50X1000 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X1000 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 1000 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 BSAI50X1000 Is Used
Vertical Axis Load Holding
Maintains a 1400 N vertical load securely at any point along the 1000 mm travel without relying on continuous air pressure.
Emergency Power-Loss Hold
The spring-applied clamp engages instantly upon air loss, freezing the rod in place to prevent uncontrolled drops.
Machining Position Lock
Secures a workpiece at a precise intermediate location for machining or inspection, independent of the end cushions.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X1000 the Right Clamp-Lock?
Select this 50 mm bore model when an application requires holding a load mid-stroke rather than only at the end, making it superior to a SAIL stroke-end lock. If your load exceeds the 1400 N holding capacity, step up to the 63 mm bore, which provides 1559 N thrust at 0.5 MPa and a 2200 N holding force. Conversely, lighter loads can use the 40 mm bore (628 N thrust, 900 N hold). A plain SAI cylinder suffices if no mid-stroke holding is needed. Because this is a 1000 mm stroke, the 20 mm rod and M16x1.5 thread provide decent side-load capacity, but an external guide rail is strongly recommended to prevent rod binding over such a long unsupported distance.
As a replacement, verify the single-rod configuration, 50 mm bore, 1000 mm stroke, and PT port threads (1/4 inch cylinder ports). The correct mounting set for this single-rod clamp-lock includes Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2. Remember that the clamp locks only after the cylinder stops and must be unlocked with balanced pressures; safety-critical applications require an additional independent mechanical 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 BSAI50X1000 FAQ
The clamp-lock provides a static holding force of 1400 N. It can hold the load at any position along the 1000 mm stroke, but only after the rod has come to a complete stop; it is not a braking device for a moving rod.
The clamp is released via a third G1/8 enclasp port, but only when air pressures on both sides of the piston are balanced to prevent the rod from jumping. Unlike SAIL, which only holds at stroke ends, this BSAI model locks anywhere, but safety-critical loads still require an independent external safety measure.
Related AirTAC Lock & Standard Cylinders
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