Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X450
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X450 is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 450mm stroke and a built-in spring-applied, air-released mechanical lock in the front cover — it holds the load at the extended (rod-out) stroke end even when air is lost.
- BoreØ80 mm
- Stroke450 mm
- Port sizeG3/8
- Lock positionFront 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 SAILF Front Locking Pneumatic Cylinder SAILF80X450
The AirTAC SAILF80X450 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. This mechanism engages automatically to hold the rod securely at the extended stroke end whenever the release air is cut, retaining the load without consuming live pressure. In the 80mm bore class, it generates 3518N of push force and 2268N of pull force at 0.7 MPa, utilizing a 25mm carbon steel rod.
Because the lock occupies the front cover, the variable air cushion on that locker end is shorter at 22.5mm compared to the 36mm cushion on the free end. The lock releases automatically via air supply or manually via a lever, but avoid using fast-exhaust valves; an independent-exhaust solenoid valve is required because back-pressure on the locker side can inadvertently lift the lock.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X450 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X450 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 450 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Lock type | Spring-applied, air-released (front 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 / 22.5 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 extended (rod-out) 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 front-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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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 SAILF Front Locking Pneumatic Cylinder SAILF80X450 Is Used
Extended Load Holding
Maintains vertical loads securely at the extended stroke end during power loss, utilizing the front spring-applied lock to prevent collapses without live air.
Overhead Conveyor Stops
Acts as a robust stop mechanism for overhead conveyor systems, holding the extended position firmly even if pneumatic pressure drops unexpectedly.
Safety Gate Hold
Keeps heavy safety gates and lifting doors locked in the open, extended position until an intentional air-release signal unlocks the mechanism.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X450 the Right Lock Cylinder?
Select this 80mm bore when an application requires 3518N push force at 0.7 MPa with a specific need to hold a load safely at the extended stroke end. If your mechanism requires holding at the retracted position, use the SAILB80 variant instead. For applications needing to clamp and hold a load at an arbitrary mid-stroke point, the BSAI clamp-lock cylinder is the correct choice rather than this stroke-end-only model.
This model features a 450mm stroke, which necessitates careful attention to side-load management; using a guided mount or external load support is highly recommended to prevent rod binding. The lock provides a static hold that engages only after the cylinder stops, meaning it is not a dynamic brake for a moving rod. If human safety depends on the load remaining extended, implement an independent mechanical safety measure alongside the lock. Replacement specifications must match the 80mm bore, 450mm stroke, front locker position, PT 3/8 port threads, and standard carbon steel rod.
Quick checklist
- ✓ Hold needed at the extended (rod-out) end?
- ✓ Or lock anywhere → use BSAI
- ✓ Independent-exhaust valve fitted
- ✓ Port/thread type (PT/G)
- ✓ Extra safety measure for people
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X450 FAQ
At 0.7 MPa operating pressure, the 80mm bore provides 3518N of push force and 2268N of pull force. It achieves a maximum push force of 4523N at 0.9 MPa.
The lock is spring-applied and air-released, holding the rod only at the extended stroke end. It engages statically after the cylinder stops and is released automatically by supplying air to the release port or manually via a lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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