Airtac BSAID Clamp Cylinder BSAID50X250S
The AirTAC Airtac BSAID Clamp Cylinder BSAID50X250S 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 BSAID50X250S
The AirTAC BSAID50X250-S is a double-acting ISO 15552 extruded profile cylinder featuring a double-rod layout and an integrated spring-applied, air-released clamp-lock. It secures the load at any position along its 250mm travel, delivering a static holding force of 1400 N. Because it is a double-rod unit, its 825 N thrust at 0.5 MPa remains equal in both extension and retraction directions. Remember that holding force and thrust are distinct quantities; you must size the 1400 N clamp capacity against your static load, not the 825 N cylinder thrust.
A defining benefit of the double-rod design is enabling dual-side workpiece mounting, such as attaching a primary tool on one end and a counterweight, position flag, or anti-rotation guide on the opposite end. The lock engages via a dedicated G1/8 enclasp port, which is entirely separate from the 1/4 cylinder ports. Note that the variable air cushion only decelerates the piston near stroke limits; the mechanical clamp is what truly holds the load. Furthermore, the clamp locks only after the rod stops moving and requires balanced air pressure to unlock safely, preventing sudden rod jumps.
Airtac BSAID Clamp Cylinder BSAID50X250S Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID50X250S |
|---|---|
| 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 BSAID50X250S Is Used
Vertical Lift Holding
Suspends a vertical load at any intermediate height using the 1400 N clamp, preventing gravity-driven drops during an air or power loss.
Machining Position Lock
Locks a dual-sided workpiece fixture rigidly in place for machining or inspection, using the second rod end for a position flag.
Emergency Arrest
Provides a reliable mid-stroke hold to secure a stopped load during unexpected energy cutoffs, requiring a full stop before locking.
Is the Airtac BSAID Clamp Cylinder BSAID50X250S the Right Clamp-Lock?
Select this double-rod model when you need equal push/pull force (825 N both ways at 0.5 MPa) alongside multi-axis mounting flexibility. If your application only requires holding at the stroke end, a SAIL cylinder suffices, but choose the BSAID50X250-S when you must arrest and hold the load anywhere in the 250mm travel. If your load exceeds the 1400 N holding capacity, step up to the 63mm bore, which provides 1402 N of thrust and a 2200 N clamp. The 20mm rod and M16x1.5 thread offer robust side-load handling, but for a 250mm stroke, an external guide is still recommended to prevent binding.
This model includes a magnet (-S) for CMSE reed and DMSE electronic sensors, using PT tapered ports. It supports a restricted mounting set (Basic, FA, LB, TC, TCM1, TCM2) because the double-rod configuration omits FB, CA, CB, and CR. For safety-critical loads, an independent external holding measure is required, as the clamp cannot brake a moving rod and only engages once the piston is stationary.
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 BSAID50X250S FAQ
It uses a spring-applied, air-released mechanism to grip the 20mm rod at any position, providing a static holding force of 1400 N. It is bidirectional and holds equally whether the rod was extending or retracting.
No, the clamp locks only after the cylinder has stopped; it cannot brake a moving rod. It must be unlocked with balanced air pressure to prevent sudden rod movement, and safety-critical loads require an independent external measure.
Related AirTAC Lock & Standard Cylinders
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