Airtac BSAI Locking Clamp Cylinder BSAI40X100S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI40X100S is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 100mm 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
- Stroke100 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 BSAI40X100S
The AirTAC BSAI40X100-S is a double-acting ISO 15552 profile cylinder equipped with a built-in clamp-lock mechanism. It uses a spring-applied, air-released gripper to secure the piston rod at any point along its 100 mm travel, delivering a static holding force of 900 N. Because this is the -S variant, it includes a magnet for position sensing and operates within a 0.15-0.7 MPa range.
It is crucial to distinguish this 900 N holding force from the cylinder's 628 N thrust at 0.5 MPa; the clamp sustains static loads independently of pneumatic thrust. The lock engages only after the rod has stopped, meaning it cannot brake a moving load. Additionally, the variable air cushion at the stroke ends only decelerates the piston, while the actual load holding is performed exclusively by the clamp.
Airtac BSAI Locking Clamp Cylinder BSAI40X100S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI40X100S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 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 BSAI40X100S Is Used
Vertical Axis Holding
Secures a 40 mm bore lifted payload at any mid-stroke height using its 900 N clamp, preventing drops during operation.
Emergency Drop Prevention
Engages automatically upon air loss to freeze the rod instantly, holding the load safely until pressure is restored.
Machining Position Lock
Locks the workpiece rigidly at a specific intermediate stroke position for drilling or inspection without drift.
Is the Airtac BSAI Locking Clamp Cylinder BSAI40X100S the Right Clamp-Lock?
Select this 40 mm bore when an application demands 628 N of thrust at 0.5 MPa combined with a 900 N static clamp hold anywhere in the stroke. If your load requires less force, the 32 mm bore offers 402 N thrust and a 600 N hold; stepping up to the 50 mm bore provides 982 N thrust and a 1400 N hold. Choose this BSAI model over a SAIL cylinder when you need mid-stroke holding rather than just an end-of-stroke lock. If no locking is required at all, a plain SAI cylinder suffices.
When integrating this cylinder, note the PT tapered ports, with a 1/4 cylinder port and a separate G1/8 enclasp port. The 16 mm rod and M12x1.25 thread provide robust side-load capacity, but external guidance is recommended for any unsupported loads. The correct mounting set includes Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2. For safety, always balance the air pressure before unlocking to prevent the rod from jumping abruptly, and add independent safety measures for human-safety-critical holds.
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 BSAI40X100S FAQ
The BSAI40X100-S provides a static holding force of 900 N. This bidirectional clamp locks the rod at any position along the stroke, but it only engages after the cylinder has stopped moving.
The clamp is released by supplying air to the G1/8 enclasp port. You must balance the air pressure on both sides of the piston before unlocking, otherwise the rod may jump abruptly. It is not a braking device for moving loads.
Related AirTAC Lock & Standard Cylinders
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