Airtac SAILB Rear Lock Cylinder SAILB160X175S
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB160X175S is a genuine double-acting ISO 15552 profile cylinder with a Ø160mm bore, 175mm 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
- Stroke175 mm
- Port sizeG3/4
- Lock positionBack cover
- Rod threadM36×2
- UnlockAir + manual
About the Airtac SAILB Rear Lock Cylinder SAILB160X175S
The AirTAC SAILB160X175-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock inside the back cover. Because it is a SAILB variant, the spring-applied, air-released lock engages precisely when the piston reaches the retracted stroke end, securely holding the carbon steel rod in place without requiring continuous live air pressure. Delivering a robust 10053N pull force at 0.5MPa, this 160mm bore actuator is designed for heavy-duty load-holding on power loss.
This model includes a magnetic piston (-S) for position monitoring with CMSE reed or DMSE electronic solid-state sensors. The variable air cushion at the locker end is notably shorter at 28mm compared to the 50mm cushion at the free end, a specific design adaptation to accommodate the locking hardware. The lock itself is a static holding device, not a dynamic brake, meaning it safely secures the load only after the cylinder has come to a complete stop.
Airtac SAILB Rear Lock Cylinder SAILB160X175S Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB160X175S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø160 mm |
| Stroke | 175 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 SAILB160X175S Is Used
Vertical Lift Safety
Secures heavy elevated platforms instantly upon power loss, holding the 10053N load safely at the retracted stroke end without relying on continuous air pressure.
Heavy Press Hold
Maintains massive clamping force on large fabricated components at the rod-in terminal, ensuring the workpiece remains fixed during secondary machining operations.
Overhead Door Lock
Provides a fail-safe mechanical lock for massive industrial bay doors, engaging automatically at the fully retracted position to prevent uncontrolled gravitational descent.
Is the Airtac SAILB Rear Lock Cylinder SAILB160X175S the Right Lock Cylinder?
Select this 160mm bore cylinder when an application requires substantial load retention at the rod-in position, offering 10053N pull force at 0.5MPa. If your system requires holding the load at the extended rod-out position, you must choose the SAILF160 variant instead. Conversely, if your application demands clamping at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice. For any stroke length of 175mm or greater, always verify your guiding structure to prevent excessive side-load wear on the carbon steel rod.
When integrating this component, avoid using fast-exhaust valves, as back-pressure on the locker side can unintentionally release the spring-applied lock; an independent-exhaust solenoid valve is required. While the air-released lock provides robust static holding, safety-critical loads that could endanger personnel must include an additional independent safety measure. Replacement specifications require matching the 160mm bore, 175mm stroke, back locker position, PT tapered 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 SAILB160X175S FAQ
At a 0.5MPa operating pressure, this 160mm bore cylinder provides 10053N of pull force and 14074N of push force. The maximum operating pressure is 1.0MPa.
The lock is spring-applied and air-released, engaging statically only at the retracted stroke end after the rod stops. It is unlocked automatically by supplying release air or manually via a lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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