Airtac BSAI Locking Clamp Cylinder BSAI80X150
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X150 is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 150mm 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
- Stroke150 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 BSAI80X150
The AirTAC BSAI80X150 is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock. It delivers 2513 N of thrust at 0.5 MPa and features a 25 mm carbon steel piston rod. A defining trait of this series is the bidirectional enclasp mechanism that grips the rod, providing a static holding force of 3600 N at any position along the 150 mm travel. You must size the holding capacity against your static load, as the 3600 N clamp force is entirely separate from the 2513 N thrust used for moving the payload.
This clamp activates via a third G1/8 enclasp port, operating separately from the 3/8 cylinder ports. Remember that the variable air cushion only decelerates the piston near stroke ends; the mechanical clamp is what actually secures the load. The lock engages only after the rod has completely stopped, meaning it cannot brake a moving rod. Furthermore, releasing the clamp requires balanced air pressure on both piston sides to prevent abrupt rod movement, which is a critical safety consideration for human-interactive equipment.
Airtac BSAI Locking Clamp Cylinder BSAI80X150 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X150 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 150 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 BSAI80X150 Is Used
Vertical Axis Load Holding
Prevents gravity-driven drops on vertical lifts by clamping the 25 mm rod at any intermediate height, securing the payload without relying on continuous air pressure.
Power Loss Safety Stop
Spring-applied mechanism instantly engages the 3600 N holding force during an air or power failure, freezing the piston exactly where it stopped in the 150 mm stroke.
Machining Position Lock
Immobilizes a workpiece or fixture firmly in place for drilling or inspection, ensuring the load does not drift despite cutting forces or vibration.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X150 the Right Clamp-Lock?
Select the BSAI80X150 when a process requires mid-stroke immobilization rather than just end-of-stroke holding, a scenario where the stroke-end-only SAIL variant falls short. If your application only needs basic extension and retraction without intermediate locking, a standard SAI cylinder is sufficient. If you need to step down, the 63 mm bore offers 1559 N thrust at 0.5 MPa and a 2200 N holding force; stepping up to the 100 mm bore yields 3927 N thrust and 5500 N holding force. Always remember the BSAI clamp locks only after the rod stops and requires balanced pressure to unlock safely, so safety-critical loads need an independent external measure.
For a direct replacement, match the single-rod configuration, 80 mm bore, 150 mm stroke, PT tapered port threads, and the carbon steel rod. The BSAI single-rod mounting set includes Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2. This 80 mm bore features a substantial 25 mm rod and M20x1.5 thread, which provides excellent rigidity and side-load resistance. Since no magnet is specified, this unit will not support CMSE reed or DMSE electronic sensors without modification.
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 BSAI80X150 FAQ
The 3600 N static holding force is the mechanical grip the clamp applies to the rod, which is separate from the 2513 N thrust used to move the load at 0.5 MPa. The clamp locks the rod at any position bidirectionally, but only after the rod has stopped moving.
The clamp must be unlocked only when the air pressures on both sides of the piston are balanced and the cylinder has stopped. If pressures are unbalanced, the rod can jump abruptly upon release. Because it cannot brake a moving rod, safety-critical applications require an additional independent safety measure.
Related AirTAC Lock & Standard Cylinders
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