Airtac SAILB Rear Lock Cylinder SAILB160X150S
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB160X150S is a genuine double-acting ISO 15552 profile cylinder with a Ø160mm bore, 150mm 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
- Stroke150 mm
- Port sizeG3/4
- Lock positionBack cover
- Rod threadM36×2
- UnlockAir + manual
About the Airtac SAILB Rear Lock Cylinder SAILB160X150S
The AirTAC SAILB160X150-S is a double-acting ISO 15552 profile cylinder equipped with a built-in mechanical lock in the back cover. Because the lock is spring-applied and air-released, cutting the release air automatically drives a lock pin into the rod, securely holding the load at the retracted stroke end without relying on live pressure. In the 160mm bore class, it generates a substantial 14074N of push force at 0.7MPa, making it suitable for heavy-duty holding tasks.
This model includes a magnet for position detection and is compatible with AirTAC CMSE reed and DMSE electronic sensors. A key design detail is that the variable air cushion at the locker end is shorter (28mm) compared to the free end (50mm) to accommodate the locking mechanism. The lock is a static holding device that engages only after the piston stops at the stroke terminal; it will not brake a moving rod.
Airtac SAILB Rear Lock Cylinder SAILB160X150S Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB160X150S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø160 mm |
| Stroke | 150 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 SAILB160X150S Is Used
Vertical Load Holding
Secures heavy lifted masses in the retracted position during a power loss, preventing gravity-driven drops without needing continuous air pressure.
Heavy Duty Clamping
Maintains high-force clamping at the stroke end on large fixtures, keeping the workpiece locked even if the main air supply is disconnected.
Gate Safety Mechanism
Holds heavy safety gates or doors securely closed in the retracted state, requiring an intentional air release signal to unlock.
Is the Airtac SAILB Rear Lock Cylinder SAILB160X150S the Right Lock Cylinder?
Choose this 160mm bore cylinder when an application demands high force and fail-safe load holding at the retracted position. If the requirement is slightly lower force, stepping down to a 125mm bore provides 8590N of push at 0.7MPa. Select the SAILB configuration when the load must be held in the rod-in position, and choose SAILF if it must be held extended. If the mechanism requires locking at an arbitrary mid-stroke point rather than the stroke end, an AirTAC BSAI clamp-lock cylinder is the correct solution instead.
For safe operation, avoid using a fast-exhaust valve with this lock cylinder; an independent-exhaust solenoid valve is required because back-pressure on the locker side can unintentionally release the lock. The standard carbon steel rod handles high axial loads, but for any safety-critical application where human safety depends on the load staying up, always add an independent safety measure. Replacement matches require a 160mm bore, 150mm stroke, back locker position, PT port threads, and the -S magnet option.
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 SAILB160X150S FAQ
At 0.7MPa operating pressure, the 160mm bore provides 14074N of push force and 9425N of pull force. The maximum operating pressure is 1.0MPa.
The lock is spring-applied and air-released, engaging only when the piston reaches the retracted stroke end to hold the load statically. It can be unlocked automatically by supplying air to the release port or by using the manual release lever.
Related AirTAC Lock & Standard Cylinders
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