Airtac SAILB Rear Lock Cylinder SAILB100X450
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB100X450 is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 450mm 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
- Stroke450 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 SAILB100X450
The AirTAC SAILB100X450 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock integrated into the back cover. It safely holds the rod at the retracted stroke end without relying on continuous live air pressure. Delivering a robust 3927N push force at 0.5 MPa, it is built with a carbon steel rod and a PT tapered port thread.
Because the locker mechanism occupies end-cover space, the variable air cushion at the locker end is shorter (24 mm) than the free-end cushion (36 mm). The lock engages statically after the piston stops; it is not a dynamic brake. To unlock, supply release air for automatic operation or use the manual release lever.
Airtac SAILB Rear Lock Cylinder SAILB100X450 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X450 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 450 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 SAILB100X450 Is Used
Vertical Load Holding
Secures lifted weights in the retracted position during power loss, preventing sudden drops.
Retracted Safety Clamp
Holds the rod firmly at the back stroke end, maintaining a safe open state on gates and guards.
Power-Outage Retention
Keeps tooling securely pulled back inside the machine profile when main air pressure is removed.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X450 the Right Lock Cylinder?
Choose this 100mm bore when a 80mm cylinder (2513N push at 0.5 MPa) cannot provide enough lifting force, but a 125mm bore (6136N) would be excessive. Select the SAILB configuration when the load must be secured in the retracted position, and choose SAILF if the extended position requires holding. If your application demands clamping at an arbitrary mid-stroke point rather than the stroke end, use the BSAI clamp-lock cylinder instead.
Ensure an independent or individual-exhaust solenoid valve is used; do not install a fast-exhaust valve, as back-pressure on the locker side can unintentionally release the lock. For any safety-critical lifting application, always add an independent mechanical safety measure. At 450mm stroke, use appropriate guiding to prevent excessive side-load on the rod. Replacement parts must match the 100mm bore, 450mm stroke, PT port, and back-lock 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 SAILB100X450 FAQ
At 0.5 MPa operating pressure, the push force is 3927N and the pull force is 3681N. At 0.7 MPa, the push force increases to 5497N.
The lock is spring-applied and air-released. It engages statically to hold the rod only at the retracted stroke end after the cylinder has stopped. To unlock, supply air to the release port for automatic operation or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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