Airtac SAILB Rear Lock Cylinder SAILB160X450
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB160X450 is a genuine double-acting ISO 15552 profile cylinder with a Ø160mm bore, 450mm 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
- Stroke450 mm
- Port sizeG3/4
- Lock positionBack cover
- Rod threadM36×2
- UnlockAir + manual
About the Airtac SAILB Rear Lock Cylinder SAILB160X450
The AirTAC SAILB160X450 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock integrated into the back cover. This lock engages automatically when the piston reaches the retracted stroke end, securely holding a 450mm stroke load without requiring continuous live air pressure. Operating at 0.15 to 1.0 MPa, the 160mm bore generates a robust 10053N pull force at 0.5 MPa, making it well suited for heavy-duty positioning tasks.
The cylinder features a carbon steel rod and PT tapered port threads. To ensure proper deceleration, it utilizes variable air cushions at both ends, with the locker-end cushion measuring 28mm, which is shorter than the free-end cushion. The lock itself releases automatically via air supply or manually via a lever, but note that it functions strictly as a static holding device at stroke end, not a dynamic brake for a moving rod.
Airtac SAILB Rear Lock Cylinder SAILB160X450 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB160X450 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø160 mm |
| Stroke | 450 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 SAILB160X450 Is Used
Vertical Lift Holding
Secures heavy elevated loads in the retracted position instantly upon air pressure loss, preventing sudden drops on large lifting machinery.
Heavy Press Retention
Maintains a massive press ram safely in its retracted end position during power loss or emergency stops, ensuring zero downward drift.
Safety Gate Locking
Keeps substantial industrial safety gates and barriers firmly closed and locked at the back stroke end without consuming continuous pneumatic energy.
Is the Airtac SAILB Rear Lock Cylinder SAILB160X450 the Right Lock Cylinder?
Select this 160mm bore model when an application requires substantial load-holding at the retracted position, as it provides 10053N of pull force at 0.5 MPa. If your system needs less force, stepping down to the 125mm bore yields 5734N of pull force at the same pressure. For applications where the load must be clamped at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct alternative. Because this unit features a 450mm stroke, adding an external guide is recommended to manage side loads and prevent rod binding.
When integrating this cylinder, adhere to strict valve-selection rules: do not use a fast-exhaust valve, and ensure an independent-exhaust solenoid valve is installed, as back-pressure on the locker side can unintentionally release the lock. The lock provides a static hold only after the cylinder stops; it will not brake a moving rod. If human safety depends on the load remaining retracted, always implement an additional independent safety measure.
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 SAILB160X450 FAQ
At 0.5 MPa, the 160mm bore provides 10053N of pull force and 14074N of push force. At the maximum operating pressure of 1.0 MPa, it delivers a maximum push force equivalent to 2050 kgf.
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 after the rod stops, not a dynamic brake, and unlocks via air supply or a manual release lever.
Related AirTAC Lock & Standard Cylinders
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