Airtac BSAI Locking Clamp Cylinder BSAI50X200
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X200 is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 200mm 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
- Stroke200 mm
- Cylinder portG1/4
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM16×1.5
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac BSAI Locking Clamp Cylinder BSAI50X200
The AirTAC BSAI50X200 is a double-acting ISO 15552 profile cylinder featuring a built-in spring-applied, air-released clamp-lock. It secures the carbon steel piston rod at any position along its 200 mm stroke, delivering a static holding force of 1400 N. The base extruded-aluminum barrel is dimensionally interchangeable per ISO 15552 standards, while the clamping mechanism engages bidirectionally to hold loads whether the rod was extending or retracting. Operating pressure ranges from 0.15 to 0.7 MPa.
It is critical to distinguish this 1400 N static holding force from the cylinder thrust, which is 982 N push and 825 N pull at 0.5 MPa. You must size the holding mechanism against the static load, not the thrust. The lock activates only after the rod has completely stopped; it cannot brake a moving load. Furthermore, the variable air cushion at the stroke ends merely decelerates the piston and does not hold the load. Unlocking requires balanced air pressure on both sides of the piston via the G1/8 enclasp port, or the rod may jump abruptly.
Airtac BSAI Locking Clamp Cylinder BSAI50X200 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X200 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 200 mm |
| Type | Single rod (BSAI), 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 | — |
Push/pull as tabulated. 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 BSAI Locking Clamp Cylinder BSAI50X200 Is Used
Vertical Axis Holding
Prevents gravity-driven drops on vertical lifts by clamping the rod at any point in the travel, holding up to 1400 N without live air pressure.
Emergency Power Loss Hold
Spring-applied clamp engages instantly upon air loss to freeze the load safely in place, though an independent safety measure is needed for human safety.
Machining Position Lock
Secures a workpiece or fixture at a precise intermediate stroke position for machining or inspection, ensuring no drift during the operation.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X200 the Right Clamp-Lock?
Select this 50 mm bore model when an application requires mid-stroke holding without relying on continuous air pressure. If your load requires less force, stepping down to a 40 mm bore provides 528 N pull thrust and a 900 N holding force. If your static load exceeds 1400 N, stepping up to a 63 mm bore yields 1402 N pull thrust and a 2200 N hold. Choose this BSAI clamp-lock over a SAIL model when you need to hold at any position rather than just at the stroke end. If locking is unnecessary, a plain SAI cylinder suffices.
For replacements, verify the single-rod configuration, 50 mm bore, 200 mm stroke, and PT tapered port threads (1/4 cylinder port, G1/8 enclasp port). This cylinder lacks a standard magnet, so it requires a specific variant for CMSE reed or DMSE electronic sensors. The accepted mounting set includes Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2. The 20 mm rod diameter and M16x1.5 thread provide robust side-load resistance, though strokes over 300 mm would require external guidance.
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 BSAI Locking Clamp Cylinder BSAI50X200 FAQ
The clamp-lock provides a static holding force of 1400 N. It locks at any position along the stroke bidirectionally, but it only engages after the cylinder has stopped moving and cannot be used to brake a moving rod.
The clamp is released by supplying air to the G1/8 enclasp port. To prevent the rod from jumping abruptly, the air pressures on both sides of the piston must be balanced before unlocking. The variable air cushion does not hold the load.
Related AirTAC Lock & Standard Cylinders
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