Airtac BSAI Locking Clamp Cylinder BSAI40X150
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI40X150 is a genuine double-acting ISO 15552 cylinder with a Ø40mm 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 900 N.
- BoreØ40 mm
- Stroke150 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 BSAI40X150
The AirTAC BSAI40X150 is a double-acting profile cylinder with a built-in clamp-lock, dimensionally interchangeable per ISO 15552. A spring-applied, air-released mechanism clamps the 16 mm carbon steel rod to secure the load at any position along the 150 mm stroke. It delivers a static holding force of 900 N, while the cylinder thrust is 628 N (push at 0.5 MPa) or 879 N at 0.7 MPa. You must size the clamp holding force against your static load, not the thrust, as these are distinct quantities.
This unit features a separate G1/8 enclasp port for the unlock pressure (0.15-0.7 MPa) alongside the 1/4 PT cylinder ports. Remember that the variable air cushion only decelerates the piston near stroke ends; the clamp is the actual holding device. The clamp locks only after the rod stops and cannot brake a moving load.
Airtac BSAI Locking Clamp Cylinder BSAI40X150 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI40X150 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 BSAI40X150 Is Used
Vertical Load Holding
Secures a 900 N vertical load at any intermediate height without relying on continuous air pressure.
Power Loss Safety
Spring-applied clamp engages automatically during air pressure loss to freeze the rod exactly where it stopped.
Machining Position Hold
Locks the workpiece rigidly in a non-end position for stable machining or inspection tasks.
Is the Airtac BSAI Locking Clamp Cylinder BSAI40X150 the Right Clamp-Lock?
Choose this 40 mm bore if the 32 mm version (402 N thrust, 600 N hold) is too weak, but the 63 mm (1559 N thrust, 2200 N hold) is oversized. Select BSAI over SAIL when you need to hold the load at an intermediate point, not just at stroke end. A plain SAI cylinder suffices if no holding is required. This single-rod model supports Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. It uses PT ports and lacks a standard magnet.
For safe operation, ensure pressures are balanced before unlocking to prevent abrupt rod movement. Because the clamp locks only after the cylinder stops, never use it as a dynamic brake. For safety-critical applications, add an independent safety measure. The 150 mm stroke is standard and under the 800 mm maximum for this bore.
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 BSAI40X150 FAQ
The integrated clamp-lock provides a static holding force of 900 N. It can hold the load at any position along the 150 mm stroke, but only after the rod has completely stopped moving.
You must apply air pressure to the G1/8 enclasp port, but only after balancing the pressures on both sides of the piston. Releasing the clamp with unbalanced pressures will cause the rod to jump abruptly.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac BSAI Locking Clamp Cylinder BSAI40X150
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.