Airtac BSAID Clamp Cylinder BSAID50X125
The AirTAC Airtac BSAID Clamp Cylinder BSAID50X125 is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 125mm 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
- Stroke125 mm
- Cylinder portG1/4
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM16×1.5
About the Airtac BSAID Clamp Cylinder BSAID50X125
The AirTAC BSAID50X125 is a double-acting ISO 15552 profile cylinder featuring a double-rod design and a spring-applied, air-released clamp-lock. It provides a static holding force of 1400 N, gripping the rod to hold the load securely at any position along its 125 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 position flag or secondary tool on the opposite end for dual-side guidance.
It is vital to distinguish this 1400 N static holding force from the 825 N cylinder thrust; the clamp sustains stationary loads without live air pressure, whereas thrust dictates movement. The clamp utilizes a third G1/8 enclasp port to release the rod, requiring a balanced air pressure of 0.15-0.7 MPa to unlock safely. Furthermore, the variable air cushion only decelerates the piston near stroke ends—it does not hold the load.
Airtac BSAID Clamp Cylinder BSAID50X125 Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID50X125 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 125 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 BSAID50X125 Is Used
Mid-Stroke Vertical Hold
Suspends elevated loads at any intermediate height along the vertical axis without relying on continuous air pressure.
Power-Loss Freeze
Secures the workpiece instantly in place anywhere in the travel range during an unexpected pneumatic power failure.
Machining Position Lock
Clamps the double-rod assembly rigidly during drilling or inspection processes to prevent unwanted deflection.
Is the Airtac BSAID Clamp Cylinder BSAID50X125 the Right Clamp-Lock?
Choose this 50 mm bore if your application requires 825 N of symmetrical thrust alongside a 1400 N static hold. If your load is lighter, the 40 mm bore offers 528 N thrust and 900 N holding force; for heavier payloads, the 63 mm bore provides 1402 N thrust and 2200 N holding force. Select the BSAID50X125 over a stroke-end-only SAIL lock when you must freeze the load mid-travel. Remember, the clamp locks only after the rod has stopped, so it cannot brake a moving load, and human-safety applications require an independent external measure.
As a direct replacement, match the double-rod configuration, 50 mm bore, 125 mm stroke, and PT port threads. The BSAID mounting set includes Basic, FA, LB, TC, TCM1, and TCM2 (omitting FB, CA, CB, CR). The 20 mm carbon steel rod with an M16x1.5 thread handles side loads well, but external guides are recommended for long strokes. This unit ships without a magnet; add the -S option if you need CMSE reed or DMSE electronic 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 BSAID50X125 FAQ
It uses a spring-applied, air-released mechanism to grip the rod, providing a 1400 N static holding force at any position. It locks bidirectionally after the cylinder stops, but cannot brake a moving rod.
The clamp is released via a third G1/8 enclasp port, but only when the air pressures on both sides of the piston are balanced. If unlocked while unbalanced, the rod may jump abruptly, so always ensure the cylinder has stopped first.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac BSAID Clamp Cylinder BSAID50X125
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.