Airtac BSAI Locking Clamp Cylinder BSAI63X400
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI63X400 is a genuine double-acting ISO 15552 cylinder with a Ø63mm bore, 400mm 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
- Stroke400 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 BSAI63X400
The AirTAC BSAI63X400 is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock mechanism. It delivers a practical push thrust of 2182 N at 0.7 MPa. Unlike a plain SAI, this enclasp unit locks the piston rod at any position along its 400 mm travel, securing the load with a static holding force of 2200 N. Remember that this holding force is a separate metric from thrust; you must size the clamp capacity against your static load, not the cylinder's pushing power.
The clamp operates via a dedicated G1/8 enclasp port, requiring 0.15-0.7 MPa to release the spring tension. Do not confuse the variable air cushions at the stroke ends with the clamp—the cushions only decelerate the piston, while the mechanical lock actually holds the load. This model features a standard carbon steel rod with an M16x1.5 thread and PT tapered ports.
Airtac BSAI Locking Clamp Cylinder BSAI63X400 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI63X400 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø63 mm |
| Stroke | 400 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 BSAI63X400 Is Used
Vertical Load Suspension
Hold a 2200 N vertical payload at any intermediate height along the 400 mm stroke without relying on continuous live air pressure.
Power Loss Safety Hold
The spring-applied clamp engages automatically when air pressure drops, freezing the mid-stroke position to prevent uncontrolled descent.
Mid-Stroke Machining Hold
Secures a workpiece at a precise intermediate point for drilling or inspection, ensuring the 400 mm stroke is rigidly locked during the process.
Is the Airtac BSAI Locking Clamp Cylinder BSAI63X400 the Right Clamp-Lock?
Choose this 63 mm bore when a 50 mm bore (982 N push at 0.5 MPa, 1400 N holding force) is too weak to safely suspend your load, but an 80 mm bore (2513 N push at 0.5 MPa, 3600 N holding force) is physically oversized. Select the BSAI clamp-lock over a SAIL model when you need to freeze the rod mid-stroke rather than just at the end. If you only need to hold the load at the fully extended or retracted position, a plain SAI cylinder is sufficient.
Because the 400 mm stroke creates a long lever arm, use an external guide rail to prevent side-loading damage to the M16x1.5 rod. The clamp locks only after the cylinder has stopped; it cannot brake a moving rod. Always balance the air pressure on both sides of the piston before unlocking, or the rod may jump abruptly. For safety-critical applications, install an independent secondary mechanical lock. This single-rod variant accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. As specified without a magnet, it does not support CMSE or DMSE sensors.
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 BSAI63X400 FAQ
The BSAI63X400 features a static holding force of 2200 N. The bidirectional enclasp mechanism provides this holding capacity at any position along the 400 mm stroke, which is separate from the 2182 N pneumatic thrust generated at 0.7 MPa.
The clamp locks only after the cylinder has stopped and cannot brake a moving rod. To release it safely, you must apply 0.15-0.7 MPa to the G1/8 enclasp port and balance the pressure on both sides of the piston; otherwise, the rod can jump abruptly when unlocked.
Related AirTAC Lock & Standard Cylinders
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