Airtac SAILB Rear Lock Cylinder SAILB100X800
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB100X800 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 SAILB100X800
The AirTAC SAILB100X800 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock integrated into the back cover. At 0.5 MPa it provides 3927 N of push force and 3681 N of pull force. Cutting the release air drives a lock pin into the carbon steel rod, ensuring the load is held securely at the retracted stroke end without requiring continuous live pressure.
The lock engages as a static holding device after the piston stops, not as a dynamic brake for a moving rod. The variable air cushion at the locker end is physically shorter (24 mm versus 36 mm at the free end) to accommodate the locking hardware. To release the rod, supply air to the release port for automatic unlocking or use the manual release lever.
Airtac SAILB Rear Lock Cylinder SAILB100X800 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X800 |
|---|---|
| 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 SAILB100X800 Is Used
Vertical Load Holding
Secures lifted masses in the retracted position during a power loss, preventing gravity-driven drops.
End-Stroke Clamping
Maintains a solid mechanical hold on the rod-in tooling without consuming compressed air.
Lift Safety Stop
Acts as a fail-safe brake at the retracted terminal for gate and heavy door mechanisms.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X800 the Right Lock Cylinder?
For applications needing 5497 N of push force, step up to the 125 mm bore, or drop to the 80 mm bore if 2513 N is sufficient. Choose this SAILB configuration when the load must be secured at the rod-in position. If your machine requires locking at an arbitrary mid-stroke point, select the BSAI clamp-lock cylinder instead. Because this is an 800 mm stroke, use a guide rail to prevent excessive side-loading on the rod.
Remember that this lock holds only at the stroke terminal. Avoid using a fast-exhaust valve with this cylinder; an independent-exhaust solenoid valve is required because back-pressure on the locker side can unintentionally lift the lock. If human safety relies on the load staying up, add an independent mechanical safety measure. Replacement parts must match the 100 mm bore, 800 mm stroke, PT 1/2 port, and the back locker position.
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 SAILB100X800 FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N. At 0.7 MPa, the push force increases to 5497 N. The maximum operating pressure is 1.0 MPa.
The lock is spring-applied and air-released, holding the rod only at the retracted stroke end after the piston stops. It is a static hold, not a dynamic brake. Unlock it automatically via the air release port or manually via the lever.
Related AirTAC Lock & Standard Cylinders
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