Airtac BSAI Locking Clamp Cylinder BSAI80X80
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X80 is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 80mm 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 3600 N.
- BoreØ80 mm
- Stroke80 mm
- Cylinder portG3/8
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM20×1.5
- 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 BSAI80X80
The AirTAC BSAI80X80 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock that grips the 25mm carbon steel rod at any position. It delivers a static holding force of 3600 N, while the cylinder itself generates 2513 N of push thrust at 0.5 MPa. You must size the holding capacity against your static load, as the clamp holding force is a completely separate quantity from the cylinder thrust. The lock engages bidirectionally, securing the load whether the rod was extending or retracting.
This enclasp mechanism operates via a third G1/8 unlock port, requiring 0.15-0.7 MPa to release the spring tension. Remember that the variable air cushion only decelerates the piston near stroke end; the clamp is the true holding device. The lock engages strictly after the cylinder has stopped, meaning it cannot brake a moving rod. Furthermore, you must balance the air pressures on both sides of the piston before unlocking, or the rod may jump abruptly, presenting a real hazard.
Airtac BSAI Locking Clamp Cylinder BSAI80X80 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X80 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 80 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G3/8 |
| Rod thread | M20×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 3600 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 (Ø80 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa (max) | 3519 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (3600 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI80X80 Is Used
Vertical Axis Hold
Secures a 2513 N payload at any point on a vertical lift, preventing gravity-driven drops during a power loss.
Machining Position Lock
Clamps the 25mm rod mid-stroke to immobilize a workpiece for drilling or inspection without relying on hydraulic brakes.
Emergency Safety Stop
Holds the load bidirectionally wherever the cylinder stopped, providing a fail-safe enclasp during an air pressure drop.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X80 the Right Clamp-Lock?
Choose this 80mm bore when an application demands 3600 N of static hold and 2513 N of thrust at 0.5 MPa. If you need less force, stepping down to the 63mm bore provides 1402 N of thrust and a 2200 N hold. Step up to the 100mm bore for 3927 N of thrust and a 5500 N hold. Select the BSAI clamp-lock over a SAIL model when you must lock at any position along the 80mm travel, rather than only at the stroke end. If mid-stroke holding is unnecessary, a plain SAI cylinder suffices.
For replacements, match the single-rod configuration, 80mm bore, 80mm stroke, and PT port threads (3/8 cylinder port, G1/8 unlock port). The BSAI80X80 accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. The M20x1.5 rod thread offers robust side-load capacity. Because the clamp locks only after the rod stops and cannot brake moving loads, safety-critical applications require an additional independent safety measure. Add an -S magnet for CMSE reed or DMSE electronic sensors if position feedback is needed.
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 BSAI80X80 FAQ
The BSAI80X80 provides a static holding force of 3600 N. It locks at any position along the stroke, but it only engages after the cylinder has stopped. It cannot brake a moving rod.
You must balance the air pressures on both sides of the piston before applying air to the G1/8 unlock port; otherwise, the rod can jump. For position sensing, specify the -S magnet option to use AirTAC CMSE reed or DMSE electronic sensors.
Related AirTAC Lock & Standard Cylinders
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