Airtac BSAID Clamp Cylinder BSAID125X450S
The AirTAC Airtac BSAID Clamp Cylinder BSAID125X450S is a genuine double-acting ISO 15552 cylinder with a Ø125mm bore, 450mm 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 8600 N.
- BoreØ125 mm
- Stroke450 mm
- Cylinder portG1/2
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM27×2
About the Airtac BSAID Clamp Cylinder BSAID125X450S
The AirTAC BSAID125X450-S is a double-acting ISO 15552 profile cylinder featuring a double-rod layout and a spring-applied, air-released clamp-lock. It secures the carbon steel piston rod at any position along its 450 mm travel, delivering a static holding force of 8600 N. Because it is a double-rod unit, the thrust is identical in both directions at 5734 N (0.5 MPa), and having a rod extending from each end allows you to mount a workpiece on one side and a guide or counterweight on the other for dual-side anti-rotation.
It is vital to distinguish this 8600 N static holding force from the cylinder's 5734 N thrust; the clamp sustains the load without live pressure, whereas thrust drives the motion. The clamp utilizes a third G1/8 enclasp port for release, operating within a 0.15-0.7 MPa range. Furthermore, the variable air cushions only decelerate the piston near stroke ends, while the clamp is the true load-holding mechanism.
Airtac BSAID Clamp Cylinder BSAID125X450S Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID125X450S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 mm |
| Type | Double rod (BSAID), double acting |
| Cylinder port | G1/2 |
| Rod thread | M27×2 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 8600 N |
| Enclasp / unlock port | G1/8 |
| Operating pressure | 0.15 – 0.7 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 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 (Ø125 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa (max) | 8590 N | — |
Equal force both directions (double rod). Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (8600 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAID Clamp Cylinder BSAID125X450S Is Used
Vertical Lift Holding
Secures heavy lifting platforms at any intermediate height along the 450 mm stroke, preventing sudden drops during power loss.
Machining Position Arrest
Locks a dual-sided workpiece rigidly in place for machining or inspection, using the second rod for a counterweight.
Emergency Drop Prevention
Provides a fail-safe hold against gravity loads the moment cylinder motion stops, requiring an independent backup for human safety.
Is the Airtac BSAID Clamp Cylinder BSAID125X450S the Right Clamp-Lock?
Select this 125 mm bore model when an application demands immense mid-stroke holding capacity that a smaller bore cannot provide. Stepping down to the 100 mm bore drops the holding force to 5500 N and the bidirectional thrust to 3681 N, whereas this 125 mm unit offers 5734 N of force both ways. Choose this BSAID clamp-lock over a plain SAID when the load must be physically arrested at an arbitrary position, not just cushioned at the ends.
The clamp locks only after the rod has stopped, meaning it cannot brake a moving load. Unlocking requires balanced air pressure on both sides of the piston, or the rod may jump abruptly. For safety-critical vertical holds, add an independent external safety measure. This 450 mm stroke exceeds 300 mm, so an external guide is recommended to manage side loads on the 32 mm rod and M27x2 thread. Ensure you use the correct double-rod mounting set (Basic, FA, LB, TC, TCM1, TCM2) and PT ports. The -S magnet option pairs with AirTAC CMSE reed and DMSE electronic sensors for position feedback.
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 BSAID125X450S FAQ
The clamp-lock provides a static holding force of 8600 N. It uses a spring-applied, air-released mechanism to grip the piston rod at any position, holding the load securely without requiring continuous air pressure.
The clamp engages only after the cylinder has stopped moving and cannot act as a brake. To unlock it safely, air pressure must be balanced on both sides of the piston via the G1/8 enclasp port; otherwise, the rod may jump. Safety-critical loads require an additional independent measure.
Related AirTAC Lock & Standard Cylinders
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