Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X125S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X125S is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 125mm 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
- Stroke125 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 SAILF80X125S
The AirTAC SAILF80X125-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released mechanical lock housed in the front cover. Because this is a SAILF variant, the lock engages when the piston reaches the extended stroke end, securely holding the rod-out position without requiring continuous live air pressure. Fitted with a carbon steel rod and a magnetic piston (-S), it supports position sensing via AirTAC CMSE reed and DMSE electronic solid-state switches.
In the 80mm bore class, this cylinder generates 2513N of push force and 2268N of pull force at 0.5MPa. The integrated variable air cushion decelerates the load near the stroke terminals, but note that the cushion at the locker end is physically shorter (22.5mm) than the free end (36mm). The lock itself is a static holding device that engages only after the rod has fully stopped, meaning it functions as a power-loss safety brake rather than a dynamic mid-stroke clamp.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X125S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X125S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 125 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 SAILF80X125S Is Used
Extended Load Holding
Maintains a vertically raised load safely at the extended rod-out position during a sudden air pressure loss or supply cutoff.
Power Failure Safety
Prevents a lowered guard or gate from crashing down by statically locking the extended stroke end when control power drops.
End-of-Stroke Clamping
Secures a workpiece at the fully extended terminal position without consuming continuous compressed air, saving energy.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X125S the Right Lock Cylinder?
Select this 80mm bore model when an application demands 2513N of thrust at 0.5MPa and requires a fail-safe hold at the extended stroke end. If your load requires less force, stepping down to a 63mm bore provides 1559N; conversely, a 100mm bore yields 3927N for heavier lifting. Choose SAILF to secure the rod-out position, or select SAILB if the retracted position must be held. If the mechanism requires clamping at an arbitrary mid-stroke point rather than the stroke terminal, the AirTAC BSAI clamp-lock cylinder is the correct choice instead.
For safe operation, never use a fast-exhaust valve with this lock cylinder, as back-pressure on the locker side can inadvertently release the lock; always utilize an independent-exhaust solenoid valve. The PT tapered porting ensures a tight pneumatic seal. When replacing this unit, verify the 80mm bore, 125mm stroke, front locker position, and the -S magnet option. If human safety relies on the load remaining extended, always add an independent mechanical safety measure beyond the pneumatic lock.
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 SAILF80X125S FAQ
At a 0.5MPa operating pressure, the 80mm bore generates 2513N of push force and 2268N of pull force. At 0.7MPa, the push force increases to 3518N.
The lock is spring-applied and air-released, engaging statically only when the rod reaches the extended stroke end. It unlocks automatically via air supply to the release port or manually via a lever, but it cannot clamp at a mid-stroke position.
Related AirTAC Lock & Standard Cylinders
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