Airtac SAILB Rear Lock Cylinder SAILB100X450S
The AirTAC SAILB Rear Lock Cylinder SAILB100X450S 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 SAILB100X450S
The AirTAC SAILB100X450-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 drives a lock pin into the 25mm carbon steel rod, securely holding the load at the retracted stroke end without consuming live pressure. At 0.5 MPa it provides 3927N of push thrust and 3681N of pull thrust, making it a robust choice for heavy vertical lifting tasks.
This 450mm stroke unit includes a magnet for position sensing via CMSE reed or DMSE electronic switches. The variable air cushion at the locker end is 24mm, intentionally shorter than the 36mm cushion on the free end to accommodate the locking hardware. You can unlock the rod automatically by supplying air to the release port, or use the manual override lever during setup or maintenance.
Airtac SAILB Rear Lock Cylinder SAILB100X450S Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X450S |
|---|---|
| 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 SAILB100X450S Is Used
Vertical Lift Power Failure Hold
Secures heavy lifting platforms in the retracted position instantly if air supply drops, preventing uncontrolled descent.
Clamp and Hold at Stroke End
Maintains high-force clamping pressure on a workpiece at the retracted end without continuously consuming compressed air.
Safety Gate Locking
Keeps heavy safety gates and machine guards firmly closed and locked in the retracted position during operation.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X450S the Right Lock Cylinder?
Choose this 100mm bore when a 80mm bore (2513N push at 0.5 MPa) lacks the lifting capacity, or step down to an 80mm unit if your load is lighter to save space. Select the SAILB configuration when the load must be held safely in the retracted position; choose a SAILF front-locker model if the extended end requires holding. If your application needs the rod clamped at an arbitrary mid-stroke point rather than at the stroke end, use the BSAI clamp-lock cylinder instead. Since this is a 450mm stroke, use a guide rail to prevent excessive side-load wear on the rod seals.
Remember that the SAIL lock is a static holding device that engages after the piston stops, not a dynamic brake for a moving rod. Never use a fast-exhaust valve with this cylinder, as back-pressure on the locker side can unintentionally release the lock; an independent-exhaust solenoid valve is required. For human-safety-critical suspended loads, always add an independent mechanical safety measure alongside the lock.
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 SAILB100X450S FAQ
At 0.5 MPa, the 100mm bore provides 3927N of push force and 3681N of pull force. At 0.7 MPa, the push force increases to 5497N. The maximum operating pressure is 1.0 MPa.
The lock is spring-applied and air-released, located in the back cover to hold the rod only at the retracted stroke end. It engages statically after the cylinder stops. Unlocking is done automatically by supplying release air, or manually via the override lever.
Related AirTAC Lock & Standard Cylinders
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