Airtac BSAI Locking Clamp Cylinder BSAI50X700S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X700S is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 700mm 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
- Stroke700 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 BSAI50X700S
The AirTAC BSAI50X700-S is a double-acting ISO 15552 profile cylinder equipped with a built-in clamp-lock mechanism. It delivers 982 N of push thrust and 825 N of pull thrust at 0.5 MPa, while its spring-applied, air-released enclasp gripper provides a static holding force of 1400 N. You must size this holding force against your static load, as the clamp capacity is entirely separate from the cylinder's thrust. Unlike standard air cushions that only decelerate the piston near stroke ends, this clamp physically grips the 20 mm rod to secure the load at any position.
This model includes a -S magnet for position sensing with AirTAC CMSE (reed) or DMSE (electronic) switches. The clamp uses a dedicated G1/8 enclasp port—separate from the 1/4 cylinder ports—and operates within a 0.15-0.7 MPa range. Remember that the lock engages only after the rod has stopped; it cannot brake a moving load. Furthermore, you must balance the air pressure on both sides of the piston before unlocking, or the rod may jump abruptly.
Airtac BSAI Locking Clamp Cylinder BSAI50X700S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X700S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 700 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 BSAI50X700S Is Used
Vertical Axis Holding
Locks a 700 mm vertical lift at any intermediate height with 1400 N of holding force, preventing gravity-driven drops during operation.
Emergency Drop Prevention
The spring-applied clamp engages automatically upon air loss, freezing the rod exactly where it stopped to secure the payload mid-stroke.
Machining Position Lock
Holds a workpiece steady at a precise custom location along the travel for machining or inspection, independent of the end-of-stroke cushions.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X700S the Right Clamp-Lock?
Choose this 50 mm bore when you need 1400 N of holding power and roughly 982 N of thrust. If your application requires less force, the 40 mm bore offers 628 N thrust and 900 N holding force; if you need more, the 63 mm bore provides 1559 N thrust and 2200 N holding force. Select this BSAI model over a SAIL cylinder when you must lock the load at any point along the 700 mm travel, rather than just at the stroke end. If no intermediate locking is needed, a plain SAI cylinder suffices.
For a direct replacement, match the single-rod configuration, 50 mm bore, 700 mm stroke, and PT port threads. The 20 mm rod with an M16x1.5 thread handles side loads well, but at 700 mm of stroke you should still use an external guide to prevent binding. This single-rod variant accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. For safety-critical loads, always add an independent holding measure, as the clamp is not a human safety brake.
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 BSAI50X700S FAQ
The built-in enclasp clamp provides a static holding force of 1400 N. It is bidirectional and locks the rod at any position along the 700 mm stroke, but only after the cylinder has stopped moving.
You must balance the air pressure on both sides of the piston before applying air to the G1/8 unlock port. If pressures are unbalanced, the rod can jump abruptly upon release. The lock is not a brake for moving loads.
Related AirTAC Lock & Standard Cylinders
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