Airtac BSAID Clamp Cylinder BSAID50X50S
The AirTAC Airtac BSAID Clamp Cylinder BSAID50X50S is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 50mm 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
- Stroke50 mm
- Cylinder portG1/4
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM16×1.5
About the Airtac BSAID Clamp Cylinder BSAID50X50S
The AirTAC BSAID50X50-S is a double-acting ISO 15552 profile cylinder featuring a double-rod design and an integrated spring-applied, air-released clamp-lock. Because it is a double-rod variant, it delivers equal thrust in both directions, generating 825 N of force on both the extend and retract strokes at 0.5 MPa. The built-in enclasp mechanism provides a static holding force of 1400 N, gripping the piston rod securely at any position along its 50 mm travel. It is crucial to distinguish this holding force from cylinder thrust: you must size the clamp's 1400 N capacity against your static load, not the 825 N motion thrust.
This clamp locks bidirectionally only after the rod has come to a complete stop; it cannot brake a moving load. Unlocking requires balanced air pressure on both sides of the piston via the dedicated G1/8 enclasp port, preventing abrupt rod jumps upon release. The double-rod configuration allows you to mount a workpiece on one end and a guide, position flag, or counterweight on the opposite end for dual-side anti-rotation guidance. Additionally, the variable air cushions at stroke ends only decelerate the piston—they do not hold the load. Position feedback is handled by the integrated magnet, which is compatible with AirTAC CMSE reed and DMSE electronic sensors.
Airtac BSAID Clamp Cylinder BSAID50X50S Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID50X50S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 50 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 BSAID50X50S Is Used
Vertical Axis Hold
Prevents gravity-driven drops on vertical lifts by clamping the rod at any intermediate height during power loss.
Machining Position Lock
Freezes a dual-sided workpiece fixture securely in place during drilling or milling without relying on live air pressure.
Inspection Station Hold
Locks the part at a precise inspection point along the travel, using the opposing rod for a position flag.
Is the Airtac BSAID Clamp Cylinder BSAID50X50S the Right Clamp-Lock?
Select this 50 mm bore model when an application demands mid-stroke holding and dual-side rod support. If you need more clamping authority, stepping up to the 63 mm bore increases the static holding force to 2200 N and the bidirectional thrust to 1402 N at 0.5 MPa. Conversely, a 40 mm bore reduces the hold to 900 N and thrust to 528 N. Choose this BSAID clamp-lock over a stroke-end-only SAIL cylinder when the load must be frozen at variable intermediate positions. If locking is entirely unnecessary, a plain SAID double-rod cylinder suffices.
As a replacement, verify the 50 mm bore, 50 mm stroke, double-rod layout, and PT tapered port threads. The 20 mm rod with an M16x1.5 thread offers robust side-load capacity for its size. For this double-rod variant, use the Basic, FA, LB, TC, TCM1, or TCM2 mounting interfaces, as the FB, CA, CB, and CR brackets are omitted. Remember that safety-critical loads require an additional independent safety measure, as the clamp only engages after the cylinder stops and requires a balanced-pressure unlock.
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 BSAID50X50S FAQ
The integrated clamp-lock provides a static holding force of 1400 N at any position along the stroke. Note that this holding force is separate from the cylinder's 825 N thrust, and the clamp only engages after the rod has stopped moving.
The clamp is spring-applied and air-released. To unlock it safely, you must apply balanced air pressure to both sides of the piston via the G1/8 enclasp port; otherwise, the rod can move abruptly. It cannot brake a moving rod.
Related AirTAC Lock & Standard Cylinders
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