Airtac BSAI Locking Clamp Cylinder BSAI80X500S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X500S is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 500mm 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
- Stroke500 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 BSAI80X500S
The AirTAC BSAI80X500-S is a double-acting ISO 15552 profile cylinder equipped with a built-in spring-applied, air-released clamp-lock. It delivers a practical push thrust of 2513 N at 0.5 MPa and features a carbon steel single rod with an M20x1.5 thread. Because the lock engages the rod at any position along the 500 mm stroke, it provides a robust static holding force of 3600 N. It is crucial to distinguish this holding force from the cylinder thrust; the 3600 N clamp rating dictates the load-holding capacity, while the thrust determines the dynamic motion force.
This enclasp mechanism is bidirectional, securing the load whether the rod was extending or retracting. The clamp operates via a dedicated G1/8 enclasp port, separate from the 3/8 cylinder ports, and requires 0.15-0.7 MPa to unlock. Remember that the variable air cushion only decelerates the piston near stroke ends; the clamp is the true holding device. Furthermore, the lock engages only after the rod stops, meaning it cannot brake a moving load.
Airtac BSAI Locking Clamp Cylinder BSAI80X500S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X500S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 500 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 BSAI80X500S Is Used
Vertical Axis Hold
Maintains a 3600 N static hold on a vertical lift at any point in the 500 mm travel, preventing uncommanded drops when air pressure is removed.
Power Loss Safety
Spring-applied clamp immediately secures the carbon steel rod in place across the stroke if the air supply drops, halting motion safely.
Machining Position Lock
Locks the workpiece at a precise intermediate distance for machining or inspection, ensuring the load remains completely rigid during the process.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X500S the Right Clamp-Lock?
Select this 80 mm bore model when an application requires intermediate position holding rather than just end-of-stroke locking, which is where the BSAI outperforms a SAIL cylinder. If your thrust needs are lower, stepping down to a 63 mm bore offers 1559 N thrust and a 2200 N holding force. If higher load capacity is needed, moving up to a 100 mm bore provides 3927 N thrust and a 5500 N hold. For simple extension and retraction without intermediate stops, a plain SAI cylinder is sufficient.
When replacing this unit, match the single-rod design, 80 mm bore, 500 mm stroke, and PT port threads. The correct mounting set includes Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2. The -S magnet works with CMSE reed and DMSE electronic sensors. Because the stroke is 500 mm, the M20x1.5 rod provides good side-load resistance, but an external guide is recommended for unsupported lengths. Always ensure balanced pressure before unlocking, as the rod can jump if released under load; for human-safety-critical applications, add an 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 BSAI80X500S FAQ
The clamp-lock provides a static holding force of 3600 N. It is bidirectional and locks the rod at any position along the 500 mm stroke, but only after the cylinder has stopped moving.
The clamp must be unlocked by applying 0.15-0.7 MPa to the G1/8 enclasp port after balancing pressures on both sides of the piston to prevent the rod from jumping. Unlike a SAIL cylinder that only holds at stroke ends, this BSAI model locks anywhere, but it cannot brake a moving rod.
Related AirTAC Lock & Standard Cylinders
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