Airtac SAILB Rear Lock Cylinder SAILB100X800S
The AirTAC SAILB Rear Lock Cylinder SAILB100X800S is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm 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.
- BoreØ100 mm
- Stroke800 mm
- Port sizeG1/2
- Lock positionBack cover
- Rod threadM20×1.5
- UnlockAir + manual
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAILB Rear Lock Cylinder SAILB100X800S
The AirTAC SAILB100X800-S is a double-acting ISO 15552 profile cylinder featuring 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 carbon steel rod, securely holding the load at the fully retracted stroke end without consuming live pressure. You can unlock it pneumatically or via the manual release lever. Delivering 3927N of push force at 0.5MPa, it provides robust load handling for heavy automation.
This 100mm bore model includes a magnetic piston (-S) for precise position sensing with CMSE reed and DMSE electronic sensors. A notable design trait is the variable air cushion: the locker end features a shorter 24mm cushion stroke compared to the 36mm cushion on the free end. Remember that the lock is a static holding device that engages after the piston stops; it will not brake a moving rod.
Airtac SAILB Rear Lock Cylinder SAILB100X800S Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X800S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 800 mm |
| Acting type | Double acting, with lock |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable (36 mm free end / 24 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SAILB100X800S Is Used
Vertical Load Holding
Maintains heavy lifted loads in the retracted position during a power loss, ensuring machinery stays safe without relying on continuous air pressure.
Safety Gate Interlock
Secures access gates and machine guards in the closed position, requiring an active air signal to release the lock and open the barrier.
Press Clamping
Holds workpieces firmly at the stroke end for extended machining cycles, preventing any drift while the tooling is engaged.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X800S the Right Lock Cylinder?
Choose this 100mm bore if your application requires the 3927N push force at 0.5MPa; if you need less force, the 80mm bore offers 2513N, while stepping up to the 125mm bore yields 6136N. Select the SAILB configuration when the load must be held safely in the retracted position. If your process requires clamping at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice. For a safe installation, never use a fast-exhaust valve, as back-pressure on the locker side can unintentionally release the lock; use an independent-exhaust solenoid valve instead. If human safety depends on the load staying up, add an independent safety measure. At an 800mm stroke, side-load risks are high, so use a dedicated guide rail to prevent rod damage. Replacement parts must match the 100mm bore, 800mm stroke, PT port threads, back locker position, and the -S 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 SAILB100X800S FAQ
At 0.5MPa, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At the maximum operating pressure of 0.9MPa, the push force increases to 7068N.
The lock is spring-applied and air-released, engaging only when the piston reaches the fully retracted stroke end. It acts as a static hold, not a dynamic brake. You can release it automatically by supplying air to the release port or manually via the lever.
Related AirTAC Lock & Standard Cylinders
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