Airtac SAILB Rear Lock Cylinder SAILB160X800
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB160X800 is a genuine double-acting ISO 15552 profile cylinder with a Ø160mm bore, 800mm 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.
- BoreØ160 mm
- Stroke800 mm
- Port sizeG3/4
- Lock positionBack cover
- Rod threadM36×2
- UnlockAir + manual
About the Airtac SAILB Rear Lock Cylinder SAILB160X800
The AirTAC SAILB160X800 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock housed within the back cover. This spring-applied, air-released mechanism engages automatically when the piston reaches the retracted stroke end, securely holding a static load without requiring continuous live air pressure. Removing the release air drives a lock pin into the carbon steel rod, ensuring maximum safety during power loss. Unlocking is achieved by supplying air to the release port for automatic operation or by utilizing the manual release lever.
Delivering substantial thrust, this 160mm bore model generates 10053N of pull force at 0.5MPa and up to 18095N at 0.9MPa. The extruded aluminum barrel includes dual sensor grooves, and while this specific unit lacks a magnet, adding an -S piston magnet enables compatibility with AirTAC CMSE reed and DMSE solid-state sensors. A notable design detail is the variable air cushion at the locker end, which is physically shorter (28mm) than the free-end cushion (50mm) to accommodate the locking hardware.
Airtac SAILB Rear Lock Cylinder SAILB160X800 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB160X800 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø160 mm |
| Stroke | 800 mm |
| Acting type | Double acting, with lock |
| Port size | G3/4 |
| Rod thread | M36×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable (50 mm free end / 28 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 (Ø160mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 10053 N | 9425 N |
| 0.7 MPa | 14074 N | — |
| Max (@1.0 MPa) | 2050 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 SAILB160X800 Is Used
Vertical Lift Safety
Holds heavy lifted loads securely at the retracted stroke end during power loss, preventing sudden drops in large vertical gate or platform mechanisms.
Heavy Clamp Retention
Maintains high-force clamping pressure on large industrial workpieces without consuming continuous air supply, engaging only after the piston fully retracts.
Press Safety Hold
Locks the rod in the retracted terminal position on heavy presses to guarantee the tooling stays open and safely disengaged during maintenance or emergency stops.
Is the Airtac SAILB Rear Lock Cylinder SAILB160X800 the Right Lock Cylinder?
Choose this 160mm bore size when your application demands heavy thrust beyond the 6136N pull of the neighboring 125mm option, but step down if 0.5MPa yields excessive force for your payload. Select the SAILB configuration specifically when the load must be securely held at the rod-in position. If your mechanism requires locking at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct alternative.
Because the 800mm stroke exceeds the 300mm threshold, employing an external guide is strongly recommended to prevent excessive side-loading on the rod. Remember that this lock is a static holding device that engages after the cylinder stops, not a dynamic brake for moving rods. Never use a fast-exhaust valve with this unit; instead, install an independent-exhaust solenoid valve, as back-pressure on the locker side can inadvertently release the lock. For overhead loads where human safety is critical, always add an independent mechanical safety measure. Replacement specifications require: 160mm bore, 800mm stroke, back locker position, PT tapered port threads, and no magnet.
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 SAILB160X800 FAQ
At 0.5MPa, this 160mm bore cylinder provides 10053N of pull force and 14074N of push force. At 0.9MPa, the push force reaches 18095N and the pull force reaches 9425N.
The lock is spring-applied and air-released, engaging only when the piston reaches the retracted stroke end in the back cover. It provides a static hold, not a dynamic brake, and is unlocked automatically via air supply or manually via a release lever.
Related AirTAC Lock & Standard Cylinders
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