Airtac SAILB Rear Lock Cylinder SAILB100X100
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB100X100 is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 100mm 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
- Stroke100 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 SAILB100X100
The AirTAC SAILB100X100 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock built into the back cover. It safely holds the rod at the retracted stroke end, maintaining a load without continuous live air pressure. In the 100mm bore class, it generates a robust 3927N of push force and 3681N of pull force at 0.5 MPa.
Because the lock occupies the back end, the variable air cushion at the locker end is shorter at 24mm compared to the 36mm cushion on the free end. To unlock the rod, you can supply release air to the port for automatic retraction or use the manual release lever. Note that this cylinder uses a carbon steel rod and PT tapered ports.
Airtac SAILB Rear Lock Cylinder SAILB100X100 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X100 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 100 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 SAILB100X100 Is Used
Vertical Lift Hold
Secures a lifted vertical load in the retracted position instantly if air supply is lost, preventing sudden drops.
Power Failure Safety
Keeps safety gates and heavy guards locked closed during power outages until release air is restored.
End-of-Stroke Clamp
Holds a workpiece firmly at the retracted stroke end for machining or processing without continuous air consumption.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X100 the Right Lock Cylinder?
Choose this 100mm bore if you need higher force than an 80mm bore (2513N push at 0.5MPa) but want to avoid the size of a 125mm option. Select the SAILB configuration when the load must be secured in the retracted position; use a SAILF front-locker model if you need to hold the extended rod-out position. If your application requires clamping at an arbitrary mid-stroke point rather than the stroke end, select the BSAI clamp-lock cylinder instead.
Remember that the SAIL lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Avoid using fast-exhaust valves, as back-pressure on the locker side can unintentionally release the spring-applied pin; an independent-exhaust solenoid valve is required. For safety-critical lifting applications, always add an independent mechanical safety measure. Replacement specifications: 100mm bore, 100mm stroke, back locker, 1/2 PT port, carbon steel rod, no 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 SAILB100X100 FAQ
At 0.5 MPa, the SAILB100X100 provides 3927N of push force and 3681N of pull force. At 0.7 MPa, the push force increases to 5497N.
The lock is spring-applied and air-released, engaging only when the piston reaches the retracted stroke end in the back cover. It provides a static hold after the rod stops, and can be unlocked automatically via release air or manually via a lever.
Related AirTAC Lock & Standard Cylinders
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