Airtac BSAI Locking Clamp Cylinder BSAI63X300
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI63X300 is a genuine double-acting ISO 15552 cylinder with a Ø63mm bore, 300mm 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 2200 N.
- BoreØ63 mm
- Stroke300 mm
- Cylinder portG3/8
- 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 BSAI63X300
The AirTAC BSAI63X300 is a double-acting ISO 15552 profile cylinder featuring a built-in spring-applied, air-released clamp-lock mechanism. A standout feature is its ability to hold a static load at any position along the 300 mm stroke with a documented holding force of 2200 N. This bidirectional enclasp grips the 20 mm carbon steel rod directly, operating entirely independently from the cylinder's standard thrust, which reaches 2182 N at 0.7 MPa. Buyers must recognize that holding force and thrust are separate values; you must size the 2200 N clamp against your static load, not the push thrust.
This model uses a 3/8 PT cylinder port for its standard pneumatics, plus a dedicated G1/8 enclasp port to control the lock. The variable air cushion at both ends decelerates the piston near stroke limits, but the clamp is the true holding mechanism. The lock engages only after the rod stops, meaning it cannot brake a moving load. To release safely, air pressure on both sides of the piston must be balanced; otherwise, the rod can jump abruptly upon unlock.
Airtac BSAI Locking Clamp Cylinder BSAI63X300 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI63X300 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø63 mm |
| Stroke | 300 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G3/8 |
| Rod thread | M16×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 2200 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 (Ø63 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa (max) | 2182 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (2200 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI63X300 Is Used
Vertical Axis Load Holding
Secures elevated platens at any point in the 300 mm travel, preventing gravity-driven drops during a pneumatic pressure loss.
Mid-Stroke Machining Hold
Clamps the extended rod with 2200 N to keep the workpiece rigidly fixed for drilling or inspection without relying on live air.
Emergency Safety Stop
Holds the load in place immediately after the cylinder stops moving, providing a fail-safe freeze during power loss events.
Is the Airtac BSAI Locking Clamp Cylinder BSAI63X300 the Right Clamp-Lock?
Choose this 63 mm bore when you need mid-stroke holding power rather than just end-of-stroke positioning. If your application requires less thrust, stepping down to the 50 mm bore gives 982 N thrust and 1400 N holding force. Conversely, heavier loads might need the 80 mm bore with 3518 N thrust and 3600 N holding force. Choose this BSAI over a SAIL model when the load must be clamped anywhere in the travel, since SAIL only locks at stroke ends. If no mid-stroke hold is needed, a plain SAI cylinder suffices.
For replacements, verify the single-rod configuration, 300 mm stroke, 3/8 PT ports, and the correct mounting set (Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, TCM2). Because this is a non-magnet model, position sensing via CMSE or DMSE switches is not possible without a -S variant. At 300 mm stroke, the 20 mm rod and M16x1.5 thread handle side loads reasonably, but an external guide is recommended for unsupported lengths to prevent binding. Remember that safety-critical holds require an independent backup measure, as the clamp cannot arrest dynamic motion.
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 BSAI63X300 FAQ
The built-in clamp-lock provides a static holding force of 2200 N. It grips the piston rod at any position along the 300 mm stroke, but only engages after the cylinder has completely stopped moving.
The clamp is spring-applied and air-released via a G1/8 port. To prevent the rod from jumping abruptly, the air pressures on both sides of the piston must be balanced before unlocking, and the cylinder must be stopped.
Related AirTAC Lock & Standard Cylinders
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