Airtac BSAID Clamp Cylinder BSAID50X250
The AirTAC Airtac BSAID Clamp Cylinder BSAID50X250 is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 250mm 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 1400 N.
- BoreØ50 mm
- Stroke250 mm
- Cylinder portG1/4
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM16×1.5
About the Airtac BSAID Clamp Cylinder BSAID50X250
The AirTAC BSAID50X250 is a double-acting ISO 15552 profile cylinder featuring a double-rod configuration and a built-in spring-applied, air-released clamp-lock. It provides a static holding force of 1400 N and can secure the load at any position along its 250 mm stroke. Because it is a double-rod unit, the thrust is equal in both directions at 825 N (0.5 MPa), and the second rod allows you to mount a workpiece on one end and a guide or counterweight on the opposite end for dual-side anti-rotation.
It is crucial to distinguish this 1400 N holding force from the 825 N cylinder thrust: the clamp secures the static load, while the thrust moves it. The clamp locks 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 near the end of travel; the clamp is the sole mechanism that holds the load. A third G1/8 enclasp port supplies the 0.15-0.7 MPa air to release the lock.
Airtac BSAID Clamp Cylinder BSAID50X250 Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID50X250 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 250 mm |
| Type | Double rod (BSAID), double acting |
| Cylinder port | G1/4 |
| Rod thread | M16×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 1400 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 1000 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 (Ø50 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa (max) | 1374 N | — |
Equal force both directions (double rod). Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (1400 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAID Clamp Cylinder BSAID50X250 Is Used
Vertical Lift Holding
Secures a mid-stroke vertical load on a double-rod platform, preventing a suspended workpiece from dropping when air pressure drops.
Machining Position Lock
Holds a part rigidly at a specific travel point for machining or inspection, using the opposing rod for a counterweight or guide.
Emergency Drop Prevention
Engages instantly upon power loss to freeze the rod at its current location, stopping sudden falls on vertical axes.
Is the Airtac BSAID Clamp Cylinder BSAID50X250 the Right Clamp-Lock?
Choose this BSAID50X250 when you need equal force both ways and a rod extending from both ends to mount a secondary tool or position flag. If your application only requires holding at the stroke end, a plain SAI or SAIL cylinder suffices. Step down to a bore 40 unit for 528 N thrust and 900 N holding, or up to a bore 63 unit for 1402 N thrust and 2200 N holding. Since this stroke is 250 mm, the 20 mm rod handles side loads well, but longer unsupported strokes still benefit from an external guide. This model uses PT tapered ports (cylinder port 1/4, enclasp port G1/8), carbon steel rods, and accepts Basic, FA, LB, TC, TCM1, or TCM2 mounts (omitting FB/CA/CB/CR). No magnet is specified, so it will not host CMSE or DMSE sensors.
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 BSAID50X250 FAQ
The clamp-lock provides a static holding force of 1400 N. It engages via a spring to hold the rod at any position along the stroke, operating entirely independently from the 825 N cylinder thrust.
The clamp locks only after the rod has stopped moving; it cannot brake a moving load. To unlock it safely, the air pressures on both sides of the piston must be balanced, otherwise the rod may jump abruptly. Safety-critical applications require an additional independent safety measure.
Related AirTAC Lock & Standard Cylinders
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