Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X200S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X200S is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 200mm 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.
- BoreØ50 mm
- Stroke200 mm
- Port sizeG1/4
- Lock positionFront cover
- Rod threadM16×1.5
- 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 SAILF50X200S
The AirTAC SAILF50X200-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. Because the lock is spring-applied and air-released, cutting the release air drives a lock pin into the 20mm carbon steel rod, securely holding the load at the extended stroke end without requiring live pressure. This 50mm bore generates 982N of push force and 825N of pull force at 0.5 MPa, making it highly effective for mid-range power-failure safety applications. The integrated -S magnet enables precise position detection using AirTAC CMSE reed or DMSE electronic solid-state sensors.
Unlike a standard SAI cylinder, this unit provides true static load holding at stroke termination. It is important to note the variable air cushion at the locker end is physically shorter at 20mm compared to the 30mm cushion on the free end, a deliberate design to accommodate the locking hardware. The lock engages only after the piston fully stops at the extended terminal, meaning it is not a dynamic brake for a moving rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X200S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X200S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 200 mm |
| Acting type | Double acting, with lock |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 (30 mm free end / 20 mm lock end) |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SAILF50X200S Is Used
Extended Lift Safety
Holds a vertical load securely in the extended position during a power loss, preventing sudden drops.
Clamp-and-Hold
Maintains clamping pressure on a workpiece at the end of the stroke without consuming continuous air.
Gate Safety Lock
Keeps safety gates and heavy doors locked in the open extended position until the release air is supplied.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X200S the Right Lock Cylinder?
Choose this 50mm bore when your application requires 982N push force at 0.5 MPa; if you need less force, the 40mm bore offers 628N, or step up to the 63mm bore for 1559N. Select the SAILF configuration specifically when the load must be held safely in the extended rod-out position. If your process requires clamping at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct alternative. For any stroke length of 200mm or more, ensure you use a guide rail to prevent excessive side-load wear on the rod.
For safe operation, never use a fast-exhaust valve with this lock cylinder; back-pressure on the locker side can inadvertently release the lock, so an independent-exhaust solenoid valve is mandatory. The lock provides a static hold without live air, but if human safety depends on the load staying extended, add an independent safety measure. Replacement matches require 50mm bore, 200mm stroke, front locker position, PT tapered port threads, and the -S magnet option.
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 SAILF50X200S FAQ
At 0.5 MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 200 kgf.
The lock is spring-applied and air-released, engaging automatically when the piston reaches the extended stroke end. It provides a static hold without live pressure. To unlock, supply air to the release port or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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