Airtac SAILB Rear Lock Cylinder SAILB80X600
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB80X600 is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 600mm stroke and a built-in spring-applied, air-released mechanical lock in the back cover — it holds the load at the retracted (rod-in) stroke end even when air is lost.
- BoreØ80 mm
- Stroke600 mm
- Port sizeG3/8
- Lock positionBack cover
- Rod threadM20×1.5
- UnlockAir + manual
About the Airtac SAILB Rear Lock Cylinder SAILB80X600
The AirTAC SAILB80X600 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the back cover. Because it is a SAILB variant, the spring-applied, air-released lock engages when the piston reaches the retracted stroke end, securely holding the load without requiring continuous live air pressure. Delivering a robust 2513N push force at 0.5 MPa, this 80mm bore unit is engineered for heavy-duty vertical holding.
The lock releases automatically via air supply or manually via a lever. To ensure proper function, the variable air cushion at the locker end is 22.5mm, intentionally shorter than the 36mm cushion at the free end. This extruded aluminum cylinder uses a 3/8 PT port and operates at speeds between 30 and 800 mm/s.
Airtac SAILB Rear Lock Cylinder SAILB80X600 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB80X600 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 600 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Lock type | Spring-applied, air-released (back cover) |
|---|---|
| Unlock | Automatic (air) & manual |
| Operating pressure | 0.15 – 1.0 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable (36 mm free end / 22.5 mm lock end) |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAIL datasheet (ISO 15552). Confirm against the product label before installation. Port options: PT / G.
How the Lock Holds
The lock is spring-applied and air-released: a spring drives a lock pin into the rod when the release air is removed, so the load is held at the retracted (rod-in) stroke end without live pressure. Supply air to the release port to unlock automatically, or use the manual release lever.
The lock engages only when the piston reaches the stroke terminal on the back-cover side — it is a static end-of-stroke hold, not a mid-stroke clamp and not a moving-rod brake. For locking at any position along the stroke, choose a BSAI clamp-lock instead.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Cylinder thrust is separate from the lock's holding capability. Actual usable force is lower than theoretical due to friction and back-pressure — size with a margin.
Where the Airtac SAILB Rear Lock Cylinder SAILB80X600 Is Used
Vertical Lift Safety
Holds elevated loads securely at the retracted stroke end during power loss, preventing sudden drops on lifting equipment.
Conveyor Arrest
Locks a stopped actuator in the retracted position to maintain clearance for passing product flow on assembly lines.
Clamp and Hold
Provides zero-pressure clamping force at the stroke terminal for heavy fixtures that must remain locked during machine cycles.
Is the Airtac SAILB Rear Lock Cylinder SAILB80X600 the Right Lock Cylinder?
Choose this 80mm bore when the 63mm class (1559N push at 0.5 MPa) is insufficient, or step up to the 100mm bore (3927N at 0.5 MPa) if your load demands greater thrust. Select SAILB to hold the load at the retracted rod-in position; choose SAILF if the extended rod-out position must be secured. If your application requires clamping at an arbitrary mid-stroke point rather than a stroke-end hold, the BSAI clamp-lock cylinder is the correct choice.
This static lock engages only after the cylinder stops, meaning it will not brake a moving rod. For reliable operation, do not use a fast-exhaust valve, as back-pressure on the locker side can inadvertently release the lock; an independent-exhaust solenoid valve is required. At 600mm stroke, side-load stresses are amplified, so external guide rails should be used to prevent rod binding. For human-safety critical lifting applications, always add an independent mechanical safety measure alongside the lock.
Quick checklist
- ✓ Hold needed at the retracted (rod-in) end?
- ✓ Or lock anywhere → use BSAI
- ✓ Independent-exhaust valve fitted
- ✓ Port/thread type (PT/G)
- ✓ Extra safety measure for people
Airtac SAILB Rear Lock Cylinder SAILB80X600 FAQ
At 0.5 MPa, the 80mm bore provides 2513N of push thrust and 2268N of pull thrust. At the maximum 1.0 MPa operating pressure, it delivers a maximum push force of 513 kgf.
The lock is spring-applied and air-released, located in the back cover to hold the rod at the retracted stroke end. It engages statically after the cylinder stops and is released automatically via air pressure or manually via a lever; it does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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