Airtac BSAI Locking Clamp Cylinder BSAI50X80S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X80S is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 80mm 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
- Stroke80 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 BSAI50X80S
The AirTAC BSAI50X80-S is a double-acting ISO 15552 profile cylinder featuring a built-in spring-applied, air-released clamp-lock. It delivers 982 N of thrust at 0.5 MPa, while the integrated enclasp mechanism provides a static holding force of 1400 N. It is crucial to distinguish holding force from cylinder thrust: the 1400 N rating defines the clamp's grip on the 20 mm carbon steel rod to hold a static load, whereas the 982 N thrust dictates the cylinder's dynamic motion power.
This bidirectional lock engages at any position along the 80 mm stroke, but only after the piston has stopped; it cannot brake a moving rod. The clamp requires a third G1/8 enclasp port alongside the two 1/4 PT cylinder ports to release the grip. Unlock pressure must be balanced between 0.15-0.7 MPa, or the rod may jump abruptly. The integrated -S magnet works with AirTAC CMSE reed and DMSE electronic sensors for position feedback.
Airtac BSAI Locking Clamp Cylinder BSAI50X80S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X80S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 80 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 BSAI50X80S Is Used
Vertical Axis Hold
Prevents gravity-driven drops on vertical lifts by clamping the rod at any intermediate stroke position during power loss.
Machining Position Lock
Secures the workpiece carriage rigidly at a specific travel point for milling or inspection operations without relying on live air pressure.
Emergency Safety Stop
Holds the load safely in place mid-stroke during an unexpected compressed air failure, ensuring the mechanism remains static.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X80S the Right Clamp-Lock?
Choose this 50 mm bore when a 40 mm bore (528 N pull thrust, 900 N hold) lacks sufficient load capacity, or step down if a 32 mm bore (345 N pull, 600 N hold) suffices. Select this BSAI model over a SAIL cylinder when you need the load held at any intermediate point rather than just at the stroke end. A plain SAI cylinder is adequate if no static holding is required. For safety-critical loads, add an independent mechanical lock, as this clamp locks only after the rod stops and requires balanced pressure to unlock safely.
This single-rod configuration accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. The 20 mm rod with an M16x1.5 thread handles side loads well, but external guidance is recommended for long unsupported strokes. Replacement requires a 50 mm bore, 80 mm stroke, PT ported single rod, and a -S magnet for CMSE/DMSE switches.
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 BSAI50X80S FAQ
The clamp-lock provides a static holding force of 1400 N. It locks at any position along the 80 mm stroke bidirectionally, but only after the cylinder has stopped moving.
The clamp is released via a third G1/8 enclasp port. You must balance the air pressure on both sides of the piston before unlocking; otherwise, the rod can jump abruptly. It cannot brake a moving rod.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac BSAI Locking Clamp Cylinder BSAI50X80S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.