Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X125S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X125S is a genuine double-acting ISO 15552 profile cylinder with a Ø200mm 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.
- BoreØ200 mm
- Stroke125 mm
- Port sizeG3/4
- Lock positionFront cover
- Rod threadM36×2
- 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 SAILF200X125S
The AirTAC SAILF200X125-S is a double-acting ISO 15552 profile cylinder equipped with a mechanical lock in the front cover, designed to hold the rod securely at the extended stroke end. Built on an extruded aluminum barrel, it provides a massive 15708N push force at 0.5MPa (up to 28274N at 0.9MPa). The integrated lock is spring-applied and air-released, meaning it engages automatically when air is cut, maintaining the load safely without consuming live pressure.
This model includes a magnet (-S) for precise position sensing using AirTAC CMSE reed or DMSE electronic solid-state switches. Because the lock resides in the front end, the variable air cushion on that side is shorter (28mm) compared to the free end (50mm). The standard carbon steel rod and PT tapered port threads ensure robust durability for heavy-duty industrial environments.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X125S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X125S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø200 mm |
| Stroke | 125 mm |
| Acting type | Double acting, with lock |
| Port size | G3/4 |
| Rod thread | M36×2 |
| 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 (50 mm free end / 28 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 (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 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 SAILF200X125S Is Used
Heavy Stamping Hold
Maintains maximum outward thrust and locks the extended rod instantly upon air loss, securing heavy stamping presses safely during power failures.
Overhead Lift Safety
Prevents massive lifted loads from dropping when supply pressure drops, utilizing the spring-applied front lock to hold the extended position without live air.
Large Fixture Clamping
Delivers up to 28274N of clamping force at 0.9MPa and locks the part at the stroke end, ensuring heavy fabrication fixtures remain rigidly closed.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X125S the Right Lock Cylinder?
Select this 200mm bore cylinder when an application demands extreme thrust alongside guaranteed load holding at the rod-out position. If the full 15708N push at 0.5MPa exceeds your requirement, stepping down to a 160mm bore yields 10053N while saving footprint; conversely, this is the maximum size available in the SAIL series. Choose SAILF to hold the extended load, or SAILB if you need the rod clamped at the retracted stroke end. If your process requires clamping at an arbitrary mid-stroke point rather than the terminal end, the BSAI clamp-lock cylinder is the correct choice instead.
Remember that the SAIL lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Valve selection is critical: never use a fast-exhaust valve, and always utilize an independent-exhaust solenoid valve, as back-pressure on the locker side can inadvertently release the lock. If human safety depends on the load remaining elevated, implement an independent mechanical safety measure. Replacement specifications must match the 200mm bore, 125mm stroke, front locker position, PT 3/4 port, 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 SAILF200X125S FAQ
At 0.5MPa, the push force is 15708N and the pull force is 15080N. At 0.9MPa, the push force increases to 28274N. The maximum operating pressure is 1.0MPa.
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 cylinder stops. To unlock, supply air to the release port or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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