Airtac BSAI Locking Clamp Cylinder BSAI80X350S
The AirTAC BSAI Locking Clamp Cylinder BSAI80X350S is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 350mm 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
- Stroke350 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 BSAI80X350S
The AirTAC BSAI80X350-S is a double-acting ISO 15552 profile cylinder with a built-in spring-applied, air-released clamp-lock. It secures the 25 mm carbon steel rod at any position along its 350 mm stroke, delivering a static holding force of 3600 N. Because it is a single-rod design, the practical thrust is 3518 N at 0.7 MPa. Remember that holding force and thrust are separate quantities: you must size the clamp's 3600 N capacity against your static load, not the cylinder's push force.
The clamp mechanism operates via a third G1/8 enclasp port and requires balanced pressure to unlock safely. Do not confuse the variable air cushion with the lock; the cushion only decelerates the piston near stroke ends, while the clamp physically grips the rod. This unit includes a magnet (-S) for precise position sensing with AirTAC CMSE reed and DMSE electronic switches.
Airtac BSAI Locking Clamp Cylinder BSAI80X350S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X350S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 350 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 BSAI80X350S Is Used
Vertical Lift Holding
Prevents gravity-driven drops on vertical axes by clamping the rod at any height, maintaining a secure 3600 N hold without live air pressure.
Power Loss Safety
Spring-applied clamping engages automatically during pneumatic power loss, freezing the load exactly where it stopped in the travel path.
Machining Position Lock
Secures a workpiece at a specific intermediate stroke point for machining or inspection, ensuring the load remains completely rigid.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X350S the Right Clamp-Lock?
Step down to a 63 mm bore if your load requires only 1559 N thrust at 0.5 MPa and 2200 N of holding force, but keep this 80 mm model for heavier 2513 N thrust demands. Choose this BSAI clamp-lock over a SAIL model when you need to secure the load at any intermediate stroke position, rather than just at the stroke end. If you only need standard movement without position holding, a plain SAI cylinder suffices.
This 350 mm stroke exceeds 300 mm, so an external guide is recommended to prevent excessive side-loading on the 25 mm rod. The clamp locks only after the rod stops and cannot brake a moving load; safety-critical applications require an additional independent measure. Replacement requires a single-rod 80 mm bore, 350 mm stroke, PT ports, and the BSAI mounting set (Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, TCM2).
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 BSAI80X350S FAQ
The 3600 N holding force is the static clamp capacity of the brake mechanism holding the rod, which is separate from the 3518 N thrust that moves the piston at 0.7 MPa. You must size the clamp capacity against your static load weight.
No, the clamp locks only after the cylinder has stopped moving; it is not a dynamic brake. It must be unlocked with balanced air pressures on both sides of the piston, or the rod may jump abruptly upon release.
Related AirTAC Lock & Standard Cylinders
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