Airtac BSAI Locking Clamp Cylinder BSAI63X450
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI63X450 is a genuine double-acting ISO 15552 cylinder with a Ø63mm bore, 450mm 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
- Stroke450 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 BSAI63X450
The AirTAC BSAI63X450 is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock mechanism. It delivers 1559 N of push thrust and 1402 N of pull thrust at 0.5 MPa. Unlike a plain SAI cylinder, this model features a bidirectional enclasp gripper that clamps the 20 mm piston rod to hold a static load at any position along its 450 mm travel, providing a documented static holding force of 2200 N. Remember that this holding force is a separate quantity from the cylinder thrust; you must size the clamp capacity against your static load, not the pneumatic push force.
The clamp operates via a dedicated G1/8 enclasp port and requires a balanced air pressure of 0.15-0.7 MPa to release safely. It is critical to understand that the variable air cushion at the stroke ends only decelerates the piston; it does not hold the load. The clamp itself locks only after the cylinder has completely stopped, meaning it cannot brake a moving rod. Furthermore, the lock must be released with balanced pressures on both sides of the piston, or the rod may jump abruptly.
Airtac BSAI Locking Clamp Cylinder BSAI63X450 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI63X450 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø63 mm |
| Stroke | 450 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 BSAI63X450 Is Used
Vertical Axis Mid-Stroke Hold
Secures a vertical payload at any point in the 450 mm travel, preventing gravity-driven drops during operation without relying on continuous air pressure.
Emergency Power Loss Hold
The spring-applied clamp engages automatically when air pressure drops, safely freezing the rod position anywhere along the stroke during an unexpected outage.
Machining Position Lock
Locks the workpiece firmly in a specific intermediate position for machining or inspection, ensuring the 2200 N holding force resists external vibrations.
Is the Airtac BSAI Locking Clamp Cylinder BSAI63X450 the Right Clamp-Lock?
Choose this 63 mm bore when a standard SAI cylinder cannot hold a load mid-stroke and a SAIL stroke-end lock is insufficient. If your application only requires holding at the fully extended or retracted position, a SAIL model is simpler; if you need to secure a load anywhere in the 450 mm travel, this BSAI is the correct choice. If you need less force, stepping down to a 50 mm bore gives 982 N push thrust and 1400 N holding force. If your load is heavier, an 80 mm bore provides 2513 N thrust and 3600 N holding force. Because this stroke is 450 mm, the 20 mm rod and M16x1.5 thread provide good side-load resistance, but an external guide is still recommended for unsupported lengths.
For a safe drop-in replacement, match the single-rod configuration, 63 mm bore, 450 mm stroke, and PT threaded ports. The 3/8 cylinder ports and G1/8 enclasp port must be plumbed correctly. This model accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. It lacks a standard magnet, so CMSE or DMSE sensors cannot be used without modification. Always ensure the cylinder has stopped before engaging the clamp, and add an independent safety measure for human-safety-critical loads.
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 BSAI63X450 FAQ
The BSAI63X450 provides a static holding force of 2200 N. This bidirectional clamp can secure the load at any position along the 450 mm stroke, but it only engages after the cylinder has stopped moving and cannot be used as a braking device.
The clamp uses a G1/8 enclasp port and requires balanced air pressure between 0.15 and 0.7 MPa to release. You must balance the pressure on both sides of the piston before unlocking; otherwise, the rod may move abruptly. An independent safety measure is required for human-safety-critical applications.
Related AirTAC Lock & Standard Cylinders
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