Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X900S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X900S is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 900mm 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
- Stroke900 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 SAILF80X900S
The AirTAC SAILF80X900-S is a double-acting ISO 15552 profile cylinder equipped with a mechanical lock in the front cover, yielding 3518N of push force at 0.7MPa. Because the lock is spring-applied and air-released, dropping the release air pressure automatically drives a pin into the rod to secure the load at the extended stroke end without consuming live energy. You can unlock it by resupplying air to the release port or by using the manual release lever.
This bore features a 25mm carbon steel rod and a 3/8 PT port, operating at speeds between 30 and 800mm/s. The variable air cushion at the locker end is 22.5mm, intentionally shorter than the 36mm cushion on the free end to accommodate the locking hardware. The integrated -S magnet supports position sensing via AirTAC CMSE reed and DMSE electronic solid-state switches.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X900S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X900S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 900 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 SAILF80X900S Is Used
Extended Lift Hold
Secures vertical lifts in the rod-out position during a power loss, preventing gravity-driven drops until air is resupplied.
Flow Control Gate
Holds a diverter gate open at the extended stroke end to maintain a clear product path without requiring constant air pressure.
Outward Clamp Station
Maintains outward clamping force on a part at the end of the stroke while downstream operations are completed.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X900S the Right Lock Cylinder?
Choose this front-lock model when your application requires the rod to be held securely in the extended position; if you need to hold the retracted rod, select a SAILB version instead. For a 900mm stroke, the extended rod is highly susceptible to side-loading, so external guide rails must be used to prevent binding and premature seal wear. If your process requires clamping at an arbitrary mid-stroke point rather than a stroke-end hold, the BSAI clamp-lock cylinder is the correct choice.
Remember this is a static holding lock that engages after the cylinder stops, not a dynamic brake for a moving rod. Valve selection is critical: do not use a fast-exhaust valve, as back-pressure on the locker side can inadvertently release the lock—use an independent-exhaust solenoid valve instead. If human safety depends on the load remaining extended, install an independent mechanical safety measure as a backup. Replacement units must match the 80mm bore, 900mm stroke, front lock position, PT ports, and -S magnet.
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 SAILF80X900S FAQ
At 0.5MPa it provides 2513N push and 2268N pull. At 0.7MPa the push force is 3518N, and at 0.9MPa it is 4523N. The maximum push force is 513kgf at 1.0MPa.
The spring-applied, air-released lock engages when the piston reaches the extended stroke end in the front cover. It holds statically after the rod stops and is released automatically by supplying air to the release port or manually via a lever. It does not clamp mid-stroke.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X900S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.