Airtac SAILB Rear Lock Cylinder SAILB160X400
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB160X400 is a genuine double-acting ISO 15552 profile cylinder with a Ø160mm bore, 400mm 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
- Stroke400 mm
- Port sizeG3/4
- Lock positionBack cover
- Rod threadM36×2
- UnlockAir + manual
About the Airtac SAILB Rear Lock Cylinder SAILB160X400
The AirTAC SAILB160X400 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the back cover. This integrated lock engages automatically when the piston reaches the retracted stroke end, securely holding a 10053N pull load at 0.5 MPa without requiring continuous air pressure. It utilizes a carbon steel rod and PT tapered port threads.
Because the lock resides in the back cover, the variable air cushion on that locker end is physically shorter, measuring 28 mm compared to the 50 mm cushion found on the free end. The lock is a static holding device that engages after the cylinder stops; it is not a dynamic brake for a moving rod. For automated detection, adding a magnet allows the use of AirTAC CMSE reed or DMSE electronic sensors.
Airtac SAILB Rear Lock Cylinder SAILB160X400 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB160X400 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø160 mm |
| Stroke | 400 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 SAILB160X400 Is Used
Vertical Lift Safety
Holds heavy elevated loads securely in the retracted position during a power loss, preventing sudden drops on vertical lifting jigs.
Clamp and Hold
Maintains high clamping force on large workpieces at the stroke end without consuming continuous compressed air.
Door and Gate Hold
Locks heavy industrial doors or warehouse gates securely in the closed position until the release air is supplied.
Is the Airtac SAILB Rear Lock Cylinder SAILB160X400 the Right Lock Cylinder?
Choose this 160 mm bore when a 125 mm bore falls short of the 6136N push force at 0.5 MPa, but a 200 mm bore providing 15708N would be excessive overkill. Select the SAILB configuration specifically when the application requires the load to be safely held at the fully retracted rod-in position. If your process requires clamping at an arbitrary mid-stroke point rather than the stroke end, select the BSAI clamp-lock cylinder instead.
With a 400 mm stroke, the extended rod length increases susceptibility to side-loading, so a dedicated external guide is strongly recommended to prevent premature seal wear. The lock holds statically at the stroke end, meaning it cannot stop a moving rod mid-flight. Never use a fast-exhaust valve with this cylinder, as back-pressure on the locker side can unintentionally release the lock; an independent-exhaust solenoid valve is required. If human safety depends on the load remaining retracted, add an independent mechanical 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 SAILB160X400 FAQ
At 0.5 MPa, it provides 10053N of push force and 9425N of pull force. At the maximum operating pressure of 0.9 MPa, the push force reaches 18095N.
The lock is spring-applied and air-released, engaging statically when the piston reaches the retracted stroke end in the back cover. It does not clamp at mid-stroke. Unlocking is achieved automatically by supplying release air or manually via the release lever.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILB Rear Lock Cylinder SAILB160X400
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.