Airtac BSAI Locking Clamp Cylinder BSAI50X700
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X700 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 BSAI50X700
The AirTAC BSAI50X700 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock mechanism. It provides a static holding force of 1400 N, gripping the 20mm carbon steel rod securely at any position along its 700mm stroke. Delivering 982N thrust at 0.5MPa (1374N at 0.7MPa), it is important to distinguish this clamp holding force from the cylinder's standard thrust; you must size the 1400N holding capacity against your static load, not the push force.
This enclasp unit operates on filtered air at 0.15-0.7MPa and uses a dedicated G1/8 unlock port alongside the 1/4 PT cylinder ports. The clamp locks bidirectionally but only after the piston has stopped, meaning it cannot brake a moving rod. Additionally, the variable air cushions at stroke ends only decelerate travel and do not contribute to holding the load.
Airtac BSAI Locking Clamp Cylinder BSAI50X700 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X700 |
|---|---|
| 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 BSAI50X700 Is Used
Vertical Axis Hold
Prevents gravity-driven drops on vertical actuators by clamping the rod at any intermediate height during an unexpected air loss event.
Machining Position Lock
Secures a workpiece firmly in a non-end-of-stroke position for machining or inspection without relying on continuous pneumatic pressure.
Power Loss Safety
Engages instantly upon air pressure loss to freeze the piston in place, protecting processes and operators from sudden collapse.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X700 the Right Clamp-Lock?
Choose this 50mm bore model when you need true mid-stroke holding power that a SAIL stroke-end-only lock cannot provide. If your load is lighter, the 40mm bore offers 528N thrust and 900N holding force; for heavier loads, step up to the 63mm bore with 1402N thrust and 2200N holding force. Because this 700mm stroke is quite long, the 20mm rod and M16x1.5 thread provide good structural integrity, but you must use an external guide to prevent side-load damage on the extruded aluminum barrel.
For safe operation, ensure pressures are balanced before unlocking to prevent the rod from jumping abruptly. This single-rod configuration accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. It uses PT tapered ports and lacks a standard magnet, so it will not work with CMSE or DMSE sensors without modification. If human safety depends on the hold, add an independent mechanical safety measure.
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 BSAI50X700 FAQ
The clamp-lock provides a static holding force of 1400 N. It grips the rod bidirectionally at any position along the 700mm stroke, but only after the piston has come to a complete stop.
The clamp unlocks via a dedicated G1/8 port when air pressures on both sides of the piston are balanced. If pressures are not equalized, the rod can move abruptly upon release, so always ensure balanced pressure before unlocking.
Related AirTAC Lock & Standard Cylinders
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