Airtac BSAID Clamp Cylinder BSAID40X300
The AirTAC Airtac BSAID Clamp Cylinder BSAID40X300 is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 300mm 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
- Stroke300 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 BSAID40X300
The AirTAC BSAID40X300 is a double-acting ISO 15552 profile cylinder featuring a double-rod configuration and a spring-applied, air-released clamp-lock. It secures the load at any point along its 300 mm travel with a static holding force of 900 N. Because it is a double-rod unit, the thrust is equal in both directions at 528 N (0.5 MPa). Buyers must distinguish this holding force from the thrust: the clamp resists a static load, whereas thrust dictates movement, so always size the 900 N rating against your actual load.
A third G1/8 enclasp port controls the unlock function, separate from the 1/4 cylinder ports. The clamp engages only after the rod has stopped, meaning it cannot brake a moving load. To prevent the rod from jumping abruptly, you must release the lock only when air pressures on both sides of the piston are balanced. The variable air cushion at the ends merely decelerates the piston; the clamp is the true holding mechanism.
Airtac BSAID Clamp Cylinder BSAID40X300 Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID40X300 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 BSAID40X300 Is Used
Vertical Axis Hold
Prevents a 40 mm bore double-rod vertical slide from dropping when air pressure is lost, clamping the rod securely at any height.
Power Loss Safety
Engages instantly during an air supply failure to freeze a mid-stroke tool or fixture in place anywhere along the 300 mm travel.
Machining Position Hold
Locks the rod at a specific intermediate point for a secondary operation while the opposite rod end supports a guide or flag.
Is the Airtac BSAID Clamp Cylinder BSAID40X300 the Right Clamp-Lock?
Choose this double-rod model when you need equal push/pull force and dual-side functionality, such as mounting a workpiece on one end and a counterweight or position flag on the other. If you do not require dual rods, the single-rod BSAI40X300 offers the same 900 N hold. If your load exceeds 900 N, step up to the 50 mm bore, which provides 825 N of pull thrust and a 1400 N holding force. If you only need to hold at the stroke ends, a plain SAID40X300 suffices.
This model accepts Basic, FA, LB, TC, TCM1, and TCM2 mounts (omitting FB/CA/CB/CR). The 16 mm carbon steel rod and M12x1.25 thread handle side loads well, but at 300 mm stroke you should add an external guide for unsupported masses. It uses PT ports and lacks a standard magnet; add an -S version for CMSE reed or DMSE solid-state sensing. Remember that safety-critical holds require an independent backup measure.
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 BSAID40X300 FAQ
The clamp-lock provides a static holding force of 900 N. It holds the rod at any position bidirectionally, but it only engages after the cylinder has stopped moving, so it cannot brake a moving load.
You must apply 0.15-0.7 MPa to the G1/8 enclasp port to release the lock. To prevent the rod from jumping abruptly, ensure the air pressures on both sides of the piston are balanced before unlocking.
Related AirTAC Lock & Standard Cylinders
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