Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160S is a genuine double-acting ISO 15552 profile cylinder with a Ø125mm bore, 160mm 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.
- BoreØ125 mm
- Stroke160 mm
- Port sizeG1/2
- Lock positionFront cover
- Rod threadM27×2
- UnlockAir + manual
About the Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160S
The AirTAC SAILF125X160-S is a double-acting ISO 15552 profile cylinder equipped with a mechanical lock in the front cover, designed to secure the rod at the extended stroke end. Featuring a 125mm bore, it generates 6136N of thrust at 0.5MPa and 11045N at 0.9MPa. The integrated lock is spring-applied and air-released, meaning it engages automatically to hold the load safely whenever release air is cut, functioning independently of live system pressure.
This unit includes a magnet for position sensing and operates at speeds of 30-500mm/s. To accommodate the locking hardware, the variable air cushion at the front locker end is 24mm, which is shorter than the 40mm cushion on the rear free end. The lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. It offers both automatic air unlocking and a manual release lever for operational flexibility.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø125 mm |
| Stroke | 160 mm |
| Acting type | Double acting, with lock |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable (40 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 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 SAILF125X160S Is Used
Extended Load Holding
Secures vertical lifts and elevated platforms in the extended position, using the spring-applied lock to prevent crashes during a sudden air pressure loss.
Power Failure Safety
Maintains the rod safely extended on machinery during power outages, holding the 6136N load without relying on continuous compressed air supply.
End-of-Stroke Clamping
Locks a workpiece firmly in place at the end of the outward stroke, ensuring heavy components remain rigidly positioned for machining or assembly.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160S the Right Lock Cylinder?
Select this 125mm bore model when an application requires robust end-of-stroke holding power at the extended position; if lower force is acceptable, the 100mm bore provides 3927N at 0.5MPa. Choose SAILF for front-cover locks that hold the rod out, and SAILB for back-cover locks that hold the rod retracted. If your application requires clamping at an arbitrary mid-stroke point rather than the stroke terminal, the BSAI clamp-lock cylinder is the correct choice instead of SAIL.
Because the lock engages only at the extended stroke end, it will not secure a load in an intermediate position. Pneumatic circuit design is critical: do not use a fast-exhaust valve with this cylinder, as back-pressure on the locker side can inadvertently release the lock; always use an independent-exhaust solenoid valve. If human safety depends on the load remaining extended, add an independent mechanical safety measure. This model features a 32mm carbon steel rod, PT tapered ports, and supports mounting types including Basic, FA, FB, CA, CB, CR, LB, TC, FTC, TCM1, and TCM2.
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 SAILF125X160S FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.9MPa, the push force increases to 11045N.
The lock is spring-applied and air-released, located in the front cover to hold the rod only at the fully extended stroke end. It engages statically after the piston stops. You can unlock it by supplying air to the release port or by using the manual release lever.
Related AirTAC Lock & Standard Cylinders
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