Airtac BSAI Locking Clamp Cylinder BSAI63X250
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI63X250 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 BSAI63X250
The AirTAC BSAI63X250 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock. It secures the load at any position along its 250 mm stroke, delivering a static holding force of 2200 N. The base extruded aluminum barrel is dimensionally interchangeable per ISO 15552 standards. At 0.7 MPa, this 63 mm bore generates 2182 N of push thrust. Buyers must distinguish this holding force from cylinder thrust: the 2200 N clamp rating defines the static load capacity, while the 2182 N thrust dictates the actuation power.
This enclasp mechanism grips the 20 mm carbon steel rod bidirectionally, functioning whether the rod was extending or retracting. A third G1/8 PT port supplies the unlock pressure, which must be applied only after cylinder pressures are balanced to prevent the rod from jumping. The variable air cushions at both ends decelerate the piston near stroke limits but do not hold the load. Without a -S magnet, this unit does not support CMSE or DMSE sensors.
Airtac BSAI Locking Clamp Cylinder BSAI63X250 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI63X250 |
|---|---|
| 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 BSAI63X250 Is Used
Vertical Load Holding
Secures elevated platforms or heavy tooling at any mid-stroke height on vertical axes, preventing gravity-driven drops during operation.
Power Failure Safety
Engages instantly upon air loss to freeze the piston in place, protecting workpieces and operators from unexpected machine movements.
Machining Position Lock
Holds a part rigidly at a specific travel point for drilling or inspection, absorbing process vibrations without relying on live air pressure.
Is the Airtac BSAI Locking Clamp Cylinder BSAI63X250 the Right Clamp-Lock?
Select this 63 mm bore when a 50 mm bore (982 N thrust, 1400 N hold) lacks sufficient clamping capacity, but an 80 mm bore (3518 N thrust, 3600 N hold) is oversized. Choose this BSAI model over a SAIL cylinder when you need to lock at any position along the travel rather than solely at the stroke end. A plain SAI cylinder suffices if no mid-stroke holding is required.
The clamp locks only after the rod has stopped; it cannot brake a moving load. Safety-critical applications require an independent external measure. For this 250 mm stroke, an external guide is recommended to manage side loads, as the M16x1.5 rod thread handles standard stress but cannot prevent all deflection. This single-rod unit accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts.
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 BSAI63X250 FAQ
The clamp-lock provides a static holding force of 2200 N. It grips the 20 mm rod bidirectionally at any position along the 250 mm stroke to hold a stationary load.
No, the clamp locks only after the cylinder has stopped; it cannot brake a moving rod. It must be unlocked with balanced air pressures to prevent the rod from jumping, and safety-critical loads require an additional independent measure.
Related AirTAC Lock & Standard Cylinders
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