Airtac BSAI Locking Clamp Cylinder BSAI40X500S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI40X500S is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 500mm 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
- Stroke500 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 BSAI40X500S
The AirTAC BSAI40X500-S is a double-acting ISO 15552 profile cylinder equipped with a built-in clamp-lock mechanism. A spring-applied, air-released gripper clamps locks the 16mm carbon steel piston rod at ANY position along the 500mm stroke, delivering a static holding force of 900 N. Because it is a single-rod design, the thrust is 628 N push and 528 N pull at 0.5 MPa. You must size the holding force against your static load, as the 900 N clamp rating is entirely separate from the cylinder thrust.
This model includes a -S magnet for position sensing with AirTAC CMSE reed and DMSE solid-state switches. The clamp operates via a third G1/8 enclasp port, requiring 0.15-0.7 MPa to unlock. Remember that the variable air cushion only decelerates the piston near stroke ends; the clamp itself is what holds the load. The lock engages only after the rod stops, and unlocking requires balanced air pressures to prevent the rod from jumping abruptly.
Airtac BSAI Locking Clamp Cylinder BSAI40X500S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI40X500S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 500 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 BSAI40X500S Is Used
Vertical Axis Holding
Prevents a 40mm bore vertical load from dropping under power loss, holding it anywhere in the 500mm stroke with 900 N of force.
Machining Position Lock
Secures a workpiece at a precise intermediate stroke position for machining or inspection, ensuring the rod does not drift.
Mid-Stroke Safety Stop
Provides emergency holding force during an unexpected air pressure drop, locking the rod instantly once it stops moving.
Is the Airtac BSAI Locking Clamp Cylinder BSAI40X500S the Right Clamp-Lock?
Step down to a 32mm bore if your load requires less than 600 N holding force or 402 N thrust, or step up to a 50mm bore for 1400 N holding and 982 N thrust. Choose this BSAI over a SAIL model when you need to lock anywhere along the travel rather than just at the stroke end. A plain SAI cylinder suffices if no mid-stroke holding is required. This 500mm stroke is standard, but at this length an external guide is recommended to handle side loads. The 16mm rod and M12x1.25 thread handle moderate side loads well.
Replacement matches: single-rod, 40mm bore, 500mm stroke, PT ported (1/4 cylinder, G1/8 enclasp), -S magnet. It accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. For safety-critical loads, add an independent safety measure, as this clamp cannot brake a moving rod.
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 BSAI40X500S FAQ
The clamp-lock provides a static holding force of 900 N. It locks the rod at any position along the stroke, but only after the cylinder has stopped moving.
The clamp is released by applying 0.15-0.7 MPa air to the G1/8 enclasp port. You must balance the air pressures on both sides of the piston before unlocking, or the rod may move abruptly. It is not a brake for a moving rod.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac BSAI Locking Clamp Cylinder BSAI40X500S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.