Airtac BSAI Locking Clamp Cylinder BSAI80X400
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X400 is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 400mm 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
- Stroke400 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 BSAI80X400
The AirTAC BSAI80X400 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock mechanism. It locks the piston rod securely at any position along its 400 mm stroke, delivering a static holding force of 3600 N. Operating at 0.15-0.7 MPa, it generates a practical maximum thrust of 3518 N. It is crucial to distinguish this holding force from cylinder thrust: the 3600 N clamp rating secures the static load independently, whereas the 3518 N thrust simply moves the load.
This bidirectional enclasp engages only after the rod has stopped, meaning it cannot brake a moving load. Release requires balanced air pressure across the piston via the G1/8 enclasp port, preventing abrupt rod jumps. Remember that the variable air cushion only decelerates the piston near stroke ends; the clamp itself is the true holding device. Without a magnet, this standard carbon-steel rod unit omits CMSE or DMSE sensor readiness.
Airtac BSAI Locking Clamp Cylinder BSAI80X400 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X400 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 400 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 BSAI80X400 Is Used
Vertical Axis Holding
Secures a 3600 N vertical load at any point in the 400 mm travel, preventing gravity-driven drops during a pneumatic pressure loss.
Machining Position Lock
Holds a workpiece mid-stroke for machining or inspection, ensuring the 25 mm rod remains rigidly clamped without relying on air cushions.
Mid-Stroke Safety Stop
Provides emergency load holding exactly where the rod stops, offering bidirectional security that end-of-stroke locks cannot achieve.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X400 the Right Clamp-Lock?
Step down to the 63 mm bore if your application only requires 1559 N thrust at 0.5 MPa and a 2200 N holding capacity, but choose this 80 mm model when moving heavier masses requiring 2513 N thrust at 0.5 MPa and a 3600 N static hold. Select the BSAI clamp-lock over a standard SAI cylinder when power loss demands mid-stroke load retention, and over a SAIL model which only secures the rod at stroke extremes. The 25 mm carbon steel rod with an M20x1.5 thread handles substantial side loads, yet at 400 mm of travel, an external guide rail is strongly recommended to prevent binding.
For safe operation, remember the clamp locks only after the cylinder halts and cannot act as a dynamic brake. Always balance pressures before unlocking to avoid sudden rod movement, and add an independent safety measure for human-safety-critical holds. This single-rod variant accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts, using PT tapered ports.
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 BSAI80X400 FAQ
The clamp-lock provides a static holding force of 3600 N. It is a bidirectional, spring-applied, air-released mechanism that locks the rod at any position, but only after the cylinder has completely stopped moving.
You must apply balanced air pressure to both sides of the piston through the cylinder ports before supplying air to the G1/8 enclasp port. This prevents the rod from jumping abruptly upon release, and an independent safety measure is required for human-safety applications.
Related AirTAC Lock & Standard Cylinders
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