Airtac BSAI Locking Clamp Cylinder BSAI100X125
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI100X125 is a genuine double-acting ISO 15552 cylinder with a Ø100mm bore, 125mm 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
- Stroke125 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 BSAI100X125
The AirTAC BSAI100X125 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock mechanism. It secures the carbon steel piston rod at any position along its 125 mm travel, providing a static holding force of 5500 N. Delivering a practical maximum push thrust of 5497 N at 0.7 MPa, it is built for heavy-duty positioning. Remember that holding force and thrust are distinct specifications: you must size the 5500 N clamp capacity against your static load, independent of the cylinder's 5497 N thrust.
This model uses a 1/2 PT cylinder port and a separate G1/8 enclasp port to release the brake. The lock engages bidirectionally but only after the rod has completely stopped; it cannot brake a moving load. Release requires balanced air pressure on both piston sides to prevent abrupt rod jump. Furthermore, the variable air cushions at the stroke ends only decelerate the piston and do not contribute to holding the load.
Airtac BSAI Locking Clamp Cylinder BSAI100X125 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI100X125 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø100 mm |
| Stroke | 125 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 BSAI100X125 Is Used
Vertical Load Holding
Maintains a 5500 N vertical load securely at any point in the 125 mm travel, preventing gravity-driven drops during a pneumatic pressure loss.
Machining Position Lock
Clamps the carbon steel rod rigidly mid-stroke to keep a heavy workpiece entirely stationary against vibration during drilling or milling.
Power Outage Safety
The spring-applied enclasp engages automatically upon air loss, freezing the 100 mm bore rod exactly where it stopped to protect operators.
Is the Airtac BSAI Locking Clamp Cylinder BSAI100X125 the Right Clamp-Lock?
Choose this 100 mm bore when a 63 mm bore (1402 N pull thrust, 2200 N holding force) cannot support your load, and step down to an 80 mm bore (2268 N pull thrust, 3600 N holding force) if your mass is lighter. Select BSAI over a SAIL model when you need to enclasp the rod at any intermediate point, rather than only at stroke extremes. If no mid-stroke holding is required, a plain SAI cylinder suffices.
For safe operation, ensure the rod is stationary before clamping and apply balanced pressure before unlocking to avoid sudden movement; safety-critical applications require an independent backup measure. This BSAI100X125 replacement features a single rod, 125 mm stroke, PT port threads, and accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, or TCM2 mounts. The M20x1.5 rod thread on the 25 mm rod handles high side loads well, though external guidance is still recommended for stability.
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 BSAI100X125 FAQ
The clamp-lock provides a static holding force of 5500 N. It engages via a spring mechanism and can hold the load at any position along the 125 mm stroke, but only after the rod has come to a complete stop.
The lock is released by supplying air to the G1/8 enclasp port, but only after the pressures on both sides of the piston are balanced. If pressures are unbalanced during release, the rod can move abruptly, so an independent safety measure is advised for human-safety loads.
Related AirTAC Lock & Standard Cylinders
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