Airtac BSAI Locking Clamp Cylinder BSAI63X75
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI63X75 is a genuine double-acting ISO 15552 cylinder with a Ø63mm bore, 75mm 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
- Stroke75 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 BSAI63X75
The AirTAC BSAI63X75 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock mechanism. A defining characteristic of this series is its ability to lock the piston rod at ANY position along its 75 mm stroke, holding a static load securely with 2200 N of force. The clamp operates bidirectionally, engaging whether the rod was extending or retracting, and requires a dedicated G1/8 enclasp port to release. Operating pressure is 0.15-0.7 MPa, generating 1559 N of push thrust at 0.5 MPa.
It is critical to distinguish the 2200 N static holding force from the cylinder thrust; buyers must size the clamp capacity against the static load weight, not the pneumatic force. The built-in variable air cushion only decelerates the piston near the stroke end to prevent impact damage, whereas the mechanical clamp is what actually holds the load. Furthermore, the clamp locks only after the rod has stopped moving and cannot function as a dynamic brake. To prevent the rod from jumping abruptly upon release, the air pressure on both sides of the piston must be balanced before unlocking.
Airtac BSAI Locking Clamp Cylinder BSAI63X75 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI63X75 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø63 mm |
| Stroke | 75 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 BSAI63X75 Is Used
Vertical Axis Hold
Locks a lifted load at any intermediate height along the 75 mm stroke, preventing gravity-driven drops during air pressure loss.
Machining Position Lock
Secures a workpiece rigidly at a custom mid-stroke point for drilling or inspection, relying on the 2200 N clamp rather than live air pressure.
Emergency Stop Hold
Maintains the rod safely in place anywhere in its travel when power is removed, stopping the load from drifting before it fully settles.
Is the Airtac BSAI Locking Clamp Cylinder BSAI63X75 the Right Clamp-Lock?
Choose this 63 mm bore model when an application requires intermediate position holding that a SAIL stroke-end lock cannot provide. If your load requires less holding power, stepping down to a 50 mm bore provides 1400 N of holding force and 982 N of thrust at 0.5 MPa; stepping up to an 80 mm bore yields 3600 N of holding force and 2513 N of thrust. If no mid-stroke clamping is needed, a plain SAI cylinder suffices. For safety-critical vertical loads, an additional independent mechanical measure is required, as the clamp only engages after the cylinder stops.
As a direct replacement, match the single-rod configuration, 63 mm bore, 75 mm stroke, and PT port threads. The 3/8 cylinder ports and G1/8 enclasp port must be plumbed correctly. Mounting options include Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2. This unit lacks a magnet, so CMSE or DMSE sensors cannot be used. The M16x1.5 rod thread and 20 mm rod diameter provide robust side-load resistance, though external guides are recommended for any unsupported load.
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 BSAI63X75 FAQ
It uses a spring-applied, air-released mechanism that clamps the piston rod at any stroke position, providing a static holding force of 2200 N. It locks bidirectionally but only engages after the rod has stopped moving, meaning it cannot brake a moving load.
Before applying air to the G1/8 enclasp port to release the clamp, the air pressures on both sides of the piston must be balanced. If they are not balanced, the rod can jump abruptly upon release, creating a hazard.
Related AirTAC Lock & Standard Cylinders
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