Airtac BSAI Locking Clamp Cylinder BSAI63X250S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI63X250S is a genuine double-acting ISO 15552 cylinder with a Ø63mm bore, 250mm 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
- Stroke250 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 BSAI63X250S
The AirTAC BSAI63X250-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock mechanism. A defining trait of this series is the ability to secure the piston rod at any position along its 250 mm travel, providing a robust static holding force of 2200 N. Because it includes the -S magnet, it readily integrates with AirTAC CMSE reed and DMSE electronic solid-state sensors for precise position feedback.
It is crucial to distinguish this 2200 N holding force from the cylinder's standard thrust; the clamp secures the static load, whereas the 0.5 MPa thrust delivers 1559 N of push power. The lock engages via a dedicated G1/8 enclasp port, operating entirely independently from the 3/8 cylinder ports. Remember that the variable air cushions only decelerate the piston near stroke ends, while the clamp mechanism is the sole device responsible for maintaining the load position.
Airtac BSAI Locking Clamp Cylinder BSAI63X250S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI63X250S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø63 mm |
| Stroke | 250 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 BSAI63X250S Is Used
Vertical Axis Holding
Secures elevated loads at any point along the vertical travel, preventing gravity-induced drops during air pressure loss.
Machining Position Lock
Freezes the rod at a specific intermediate stroke length to present a workpiece to a machining tool without drift.
Power Loss Safety
The spring-applied clamp engages automatically upon loss of system air, holding the payload safely mid-stroke.
Is the Airtac BSAI Locking Clamp Cylinder BSAI63X250S the Right Clamp-Lock?
Choose this 63 mm bore if your application requires intermediate stopping along the stroke, as a plain SAI cylinder only coasts to a stop. If your load demands less holding power, the 50 mm bore offers 1400 N holding force and 982 N thrust at 0.5 MPa; stepping up to the 80 mm bore provides 3600 N holding force and 2513 N thrust. The BSAI63X250-S is ideal when you need to hold a position securely without maintaining live air pressure.
For safe operation, understand that the clamp locks only after the rod has completely stopped, meaning it cannot function as an emergency brake for a moving load. Furthermore, you must balance the air pressure on both sides of the piston before releasing the clamp, or the rod may jump abruptly. As a direct replacement, match the single-rod design, 63 mm bore, 250 mm stroke, PT port threads, and the -S magnet. Mounting options include Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2. The 20 mm rod and M16x1.5 thread offer substantial side-load capacity, though an external guide is recommended for this 250 mm stroke.
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 BSAI63X250S FAQ
The clamp-lock provides a static holding force of 2200 N. It engages via a spring-applied gripper to hold the rod securely at any position along the 250 mm stroke, independent of the cylinder thrust.
The clamp locks only after the cylinder has stopped moving and cannot brake a moving rod. To release it safely, you must apply 0.15-0.7 MPa of air to the G1/8 enclasp port only after balancing the pressures on both sides of the piston, otherwise the rod may move abruptly upon unlocking.
Related AirTAC Lock & Standard Cylinders
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