Airtac BSAI Locking Clamp Cylinder BSAI63X25
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI63X25 is a genuine double-acting ISO 15552 cylinder with a Ø63mm bore, 25mm 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
- Stroke25 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 BSAI63X25
The AirTAC BSAI63X25 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, while the integrated enclasp gripper provides a static holding force of 2200 N. You must size the holding force against your static load, as the clamp holding capacity is a distinct quantity separate from the cylinder thrust. The mechanism locks the carbon steel rod at any position along the 25 mm travel. A third G1/8 enclasp port supplies the unlock pressure.
The clamp engages bidirectionally to secure the load whether the rod was extending or retracting. It is essential to understand that the variable air cushion only decelerates the piston near stroke end; the clamp is the sole device that holds the load. Furthermore, the lock engages only after the cylinder has stopped and cannot brake a moving rod. Unlocking requires balanced air pressures on both sides of the piston, or the rod may move abruptly upon release.
Airtac BSAI Locking Clamp Cylinder BSAI63X25 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI63X25 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø63 mm |
| Stroke | 25 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 BSAI63X25 Is Used
Vertical Axis Holding
Securely holds a vertical payload at any point in the 25 mm travel, preventing drops when air pressure is removed.
Power Loss Safety
Spring-applied clamp engages automatically during an air failure to freeze the rod safely in its current position.
Machining Position Hold
Locks the workpiece rigidly mid-stroke for a machining or inspection process without relying on continuous air supply.
Is the Airtac BSAI Locking Clamp Cylinder BSAI63X25 the Right Clamp-Lock?
Choose this 63 mm bore model when an application requires 1559 N of thrust at 0.5 MPa alongside a robust 2200 N static hold. If your load requires less force, stepping down to the 50 mm bore offers 982 N thrust and a 1400 N holding capacity. If you only need to hold the load at the stroke end, a plain SAI or SAIL cylinder suffices, but the BSAI is required for mid-stroke holding. Because the 25 mm stroke is very short, side-load stress on the M16x1.5 rod thread is minimal. This single-rod version accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. It features PT tapered ports and no magnet. Remember that safety-critical loads need an additional independent safety measure.
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 BSAI63X25 FAQ
The clamp-lock provides a static holding force of 2200 N. It locks the rod at any position along the stroke bidirectionally, but it only engages after the cylinder has stopped and cannot brake a moving load.
The clamp is released by supplying 0.15-0.7 MPa to the G1/8 enclasp port. Air pressures on both sides of the piston must be balanced before unlocking, or the rod may jump abruptly. Safety-critical applications require an independent backup measure.
Related AirTAC Lock & Standard Cylinders
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