Airtac BSAI Locking Clamp Cylinder BSAI40X80
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI40X80 is a genuine double-acting ISO 15552 cylinder with a Ø40mm 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 900 N.
- BoreØ40 mm
- Stroke80 mm
- Cylinder portG1/4
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM12×1.25
- 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 BSAI40X80
The AirTAC BSAI40X80 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock mechanism. It delivers 628 N of push thrust at 0.5 MPa, while the integrated enclasp gripper provides a 900 N static holding force. Remember that holding force and thrust are distinct quantities: you must size the 900 N clamp rating against your static load weight, not the cylinder's propulsion thrust.
Unlike a standard SAIL model that only secures the rod at stroke ends, this BSAI unit locks the 16 mm carbon steel rod at any position along its 80 mm travel. The bidirectional clamp engages only after the piston has stopped, meaning it cannot brake a moving load. A third G1/8 PT port supplies the unlock pressure, which must be applied with balanced cylinder pressures to prevent the rod from jumping abruptly upon release.
Airtac BSAI Locking Clamp Cylinder BSAI40X80 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI40X80 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G1/4 |
| Rod thread | M12×1.25 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 900 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 800 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 (Ø40 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa (max) | 880 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (900 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI40X80 Is Used
Vertical Axis Holding
Secures a 40 mm bore lift at any intermediate height during power loss, relying on the 900 N static clamp rather than continuous air pressure.
Machining Position Lock
Freezes the 16 mm rod mid-stroke to hold a workpiece steady against vibration during drilling or inspection processes.
Emergency Drop Prevention
Acts as a bidirectional fail-safe that grips the rod instantly after the cylinder stops, preventing sudden load drops on pneumatic failure.
Is the Airtac BSAI Locking Clamp Cylinder BSAI40X80 the Right Clamp-Lock?
Select this 40 mm bore model when an application requires 628 N of thrust at 0.5 MPa combined with a 900 N holding capacity anywhere in the stroke. If your load requires less force, stepping down to a 32 mm bore offers 402 N thrust and a 600 N hold; if you need more stopping security, an 80 mm bore provides 2513 N thrust and a 3600 N hold. Choose BSAI over SAIL when you need mid-stroke security, and use a plain SAI when no clamp is required.
This cylinder accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. It operates at 0.15-0.7 MPa with a 1/4 PT cylinder port and the separate G1/8 enclasp port. Because this unit lacks the -S magnet option, it does not support CMSE or DMSE sensors. For safety-critical human loads, always add an independent mechanical safety measure, as the clamp is not a substitute for a brake.
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 BSAI40X80 FAQ
The BSAI40X80 provides a static holding force of 900 N. The spring-applied gripper locks the 16 mm rod at any position along the 80 mm stroke, holding the load securely without requiring live air pressure.
The clamp unlocks via a third G1/8 port using 0.15-0.7 MPa air pressure. You must balance the air pressures on both sides of the piston before releasing the clamp; otherwise, the rod may move abruptly. The lock only engages after the rod has stopped and cannot brake a moving load.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac BSAI Locking Clamp Cylinder BSAI40X80
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.