Airtac BSAI Locking Clamp Cylinder BSAI100X50
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI100X50 is a genuine double-acting ISO 15552 cylinder with a Ø100mm bore, 50mm 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 5500 N.
- BoreØ100 mm
- Stroke50 mm
- Cylinder portG1/2
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM20×1.5
- 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 BSAI100X50
The AirTAC BSAI100X50 is a double-acting ISO 15552 profile cylinder featuring a built-in spring-applied, air-released clamp-lock mechanism. It delivers 3927 N of thrust at 0.5 MPa and provides a robust static holding force of 5500 N. Unlike standard thrust, which is the dynamic push generated by air pressure, the clamp holding force is an independent mechanical grip that secures the 25 mm carbon steel rod precisely where it stops along the 50 mm stroke. This bidirectional enclasp locks the load whether the rod was extending or retracting, preventing drift without requiring live air pressure.
A critical operational detail is that this clamp locks only after the piston has come to a complete stop; it cannot brake a moving rod. The mechanism is controlled via a dedicated G1/8 enclasp port, which is entirely separate from the 1/2 inch cylinder drive ports. Unlocking requires balanced air pressure on both sides of the piston, as releasing the clamp unevenly can cause the rod to jump abruptly. Furthermore, the variable air cushions at the stroke ends only decelerate the piston near the limits and do not contribute to holding the load. For safety-critical applications where human injury is a risk, an additional independent safety measure is required.
Airtac BSAI Locking Clamp Cylinder BSAI100X50 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI100X50 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø100 mm |
| Stroke | 50 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G1/2 |
| Rod thread | M20×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 5500 N |
| Enclasp / unlock port | G1/8 |
| Operating pressure | 0.15 – 0.7 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 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 (Ø100 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa (max) | 5498 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (5500 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI100X50 Is Used
Vertical Axis Load Holding
Secures heavy vertical lifts at any point in the 50 mm travel, preventing sudden drops during a power loss event.
Machining Position Lock
Clamps the workpiece carriage rigidly mid-stroke to absorb machining vibrations without relying on continuous air pressure.
Emergency Stop Hold
Maintains the exact position of a stopped actuator during an e-stop, locking the 25 mm rod instantly upon halt.
Is the Airtac BSAI Locking Clamp Cylinder BSAI100X50 the Right Clamp-Lock?
Choose this 100 mm bore model when a 50 mm stroke application demands high intermediate-position holding, stepping up from a BSAI80X50 which offers 2513 N thrust and 3600 N holding force. The BSAI series outperforms the SAIL line because it can lock at any point along the travel, whereas SAIL only secures the load at the stroke extremes. If the job only requires moving a load without mid-stroke holding, a plain SAI cylinder is sufficient. The 25 mm rod and M20x1.5 thread provide excellent rigidity and side-load resistance, though any stroke over 300 mm would still need an external guide. This single-rod configuration supports Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts, using PT threaded ports. Since no magnet is specified, position sensing via CMSE or DMSE switches is not enabled.
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 BSAI100X50 FAQ
The clamp-lock provides a static holding force of 5500 N. It is a bidirectional grip that secures the rod at any position along the 50 mm stroke, but it only engages after the cylinder has completely stopped moving.
The clamp is released via a dedicated G1/8 enclasp port, but only after the air pressures on both sides of the piston are balanced. If the pressures are unbalanced upon release, the rod can move abruptly, so ensure balanced pressure before unlocking.
Related AirTAC Lock & Standard Cylinders
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