Airtac BSAID Clamp Cylinder BSAID40X25S
The AirTAC Airtac BSAID Clamp Cylinder BSAID40X25S is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 25mm 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
- Stroke25 mm
- Cylinder portG1/4
- TypeDouble rod (BSAID)
- 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 BSAID Clamp Cylinder BSAID40X25S
The AirTAC BSAID40X25-S is a double-acting ISO 15552 profile cylinder featuring a double-rod configuration and a spring-applied, air-released clamp-lock. It delivers a bidirectional static holding force of 900 N at any position along its 25 mm travel. Because it is a double-rod actuator, the thrust is equal in both directions at 528 N, and the second protruding rod is ideal for mounting a position flag, guide, or secondary tool. Operating pressure is 0.15-0.7 MPa.
It is vital to distinguish this 900 N static holding force from the 528 N thrust; the clamp secures the static load, while thrust dictates movement. The lock engages via a third G1/8 enclasp port and functions only after the piston has stopped, meaning it cannot brake a moving rod. Additionally, the variable air cushions merely decelerate the piston near stroke ends, while the clamp itself provides the actual load holding. An -S magnet enables position sensing with AirTAC CMSE reed or DMSE electronic switches.
Airtac BSAID Clamp Cylinder BSAID40X25S Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID40X25S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Type | Double rod (BSAID), 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 | — |
Equal force both directions (double rod). 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 BSAID Clamp Cylinder BSAID40X25S Is Used
Vertical Load Holding
Secures a workpiece at any intermediate height on a vertical axis, using the 900 N clamp to prevent gravity-induced drops without relying on live air pressure.
Power Loss Safety
The spring-applied clamp engages automatically during an air or power loss, freezing the double-rod payload exactly where it stopped along the travel.
Machining Position Lock
Holds a part rigidly for secondary machining or inspection, using the opposing rod end to mount a guide or counterweight for balanced loading.
Is the Airtac BSAID Clamp Cylinder BSAID40X25S the Right Clamp-Lock?
Choose this double-rod model when your application requires equal force both ways and a secondary attachment point on the opposite rod end. If you only need unidirectional thrust, a single-rod BSAI40X25-S provides the same 900 N holding force. Step up to a 50 mm bore if you need 825 N of pull thrust, or down to a 32 mm bore for 345 N pull thrust and a 600 N hold. Select BSAI over SAIL when you must lock at any intermediate stroke position rather than just at the end.
For safe operation, balance the air pressure on both sides of the piston before unlocking, or the rod may jump abruptly. The clamp locks only after the cylinder stops, so human-safety applications require an independent external measure. This unit uses PT ports, a 16 mm carbon steel rod with an M12x1.25 thread, and accepts Basic, FA, LB, TC, TCM1, or TCM2 mounts (omitting FB/CA/CB/CR). Speed range is 30-800 mm/s.
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 BSAID Clamp Cylinder BSAID40X25S FAQ
The clamp provides a 900 N static holding force. It is a spring-applied, air-released mechanism that locks the rod at any position bidirectionally, but only after the cylinder has stopped moving.
You must balance the air pressure on both sides of the piston before supplying air to the G1/8 unlock port. If pressures are unbalanced, the rod can jump abruptly upon release. Safety-critical loads require an independent external measure.
Related AirTAC Lock & Standard Cylinders
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