Airtac SAILB Rear Lock Cylinder SAILB100X80
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB100X80 is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 80mm 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
- Stroke80 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 SAILB100X80
The AirTAC SAILB100X80 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the back cover. This lock safely holds the rod at the retracted stroke end, maintaining load positioning without requiring continuous live air pressure. In the 100mm bore class, it generates 3927N of push force and 3681N of pull force at 0.5 MPa, making it suitable for heavy-duty holding tasks.
The lock engages automatically via internal spring pressure and releases when supply air is fed to the release port, though a manual release lever is also provided. Because the lock occupies the back cover, the variable air cushion on that locker end is shorter at 24mm compared to the 36mm cushion on the free end. The carbon steel piston rod provides robust side-load resistance, and the extruded aluminum barrel is dimensionally interchangeable per ISO 15552 mounting interfaces.
Airtac SAILB Rear Lock Cylinder SAILB100X80 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X80 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 80 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 SAILB100X80 Is Used
Vertical Load Holding
Secures elevated loads in the retracted position during a power loss or air pressure drop, preventing sudden drops in heavy lifting assemblies.
End-of-Stroke Clamping
Maintains positive mechanical tension on a workpiece pulled back to the home position, keeping the part firmly held without consuming compressed air.
Safety Gate Hold
Locks heavy safety gates or machine guards in the closed position, requiring an intentional air release signal to unlock and open.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X80 the Right Lock Cylinder?
Select this 100mm bore cylinder when an application requires substantial holding force—stepping down to an 80mm bore reduces push force to 2513N at 0.5 MPa, while stepping up to 125mm increases it to 6136N. Choose the SAILB configuration when the load must be secured in the retracted position; if the extended position needs holding, the SAILF variant is required instead. For applications needing the rod clamped at an arbitrary mid-stroke point rather than a stroke end, the BSAI clamp-lock cylinder is the correct choice.
This SAIL model provides a static holding brake 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 inadvertently release the lock; always utilize an independent-exhaust solenoid valve. If human safety depends on the load remaining retracted, implement an independent external safety measure. Replacement specifications must match the 100mm bore, 80mm stroke, back locker position, PT threaded ports, and standard carbon steel rod without a sensor 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 SAILB100X80 FAQ
At 0.5 MPa operating pressure, the 100mm bore 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, located in the back cover to hold the rod securely at the retracted stroke end. It unlocks automatically via air pressure or manually via a lever, but it only engages after the piston stops, acting as a static hold rather than a mid-stroke clamp.
Related AirTAC Lock & Standard Cylinders
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