Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X50S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X50S is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 50mm 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
- Stroke50 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 SAILF50X50S
The AirTAC SAILF50X50-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. It delivers 982N of push force at 0.5 MPa and safely secures the rod at the extended stroke-end position. The spring-applied, air-released mechanism engages automatically when pressure drops, holding the load without relying on live air. A carbon steel rod and PT tapered port threads come standard on this unit.
Because the lock engages at the front stroke terminal, the variable air cushion on that locker end is intentionally shorter at 20mm compared to the 30mm cushion on the free end. The integrated -S magnet allows precise position detection using AirTAC CMSE reed switches or DMSE solid-state electronic sensors. Remember that this lock is a static holding device designed to engage after the cylinder stops, not a dynamic brake for a moving rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X50S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X50S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 50 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 SAILF50X50S Is Used
Vertical Lift Holding
Maintains an extended vertical load securely in place during a sudden air pressure loss or supply cutoff, preventing uncontrolled drops.
Pallet Stop Gate
Locks a diverter or stopper gate in the extended position to halt pallets on a packaging line, keeping the barrier rigid without consuming continuous air.
Clamp and Hold
Extends a workpiece clamp to its forward stroke end and mechanically locks it there, ensuring the part remains firmly secured during machining operations.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X50S the Right Lock Cylinder?
Select this 50mm bore model when your application demands 982N of push force at 0.5 MPa and requires the load to be held securely at the extended stroke end. If your setup needs to hold the rod in a retracted position, choose the SAILB variant instead. For applications where the load must be clamped at an arbitrary mid-stroke point rather than a stroke terminal, the BSAI clamp-lock cylinder is the correct choice.
Always use an independent-exhaust solenoid valve for this cylinder; never use a fast-exhaust valve, as back-pressure on the locker side can unintentionally release the lock. If human safety depends on the load remaining extended, add an independent safety measure. Replacement parts must match the 50mm bore, 50mm stroke, front locker position, PT port thread, and the -S magnet specification.
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 SAILF50X50S FAQ
At 0.5 MPa, this double-acting cylinder provides 982N of push force and 825N of pull force. At the maximum operating pressure of 1.0 MPa, it delivers up to 200 kgf of push force.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end in the front cover. It provides a static hold after the cylinder stops and is released automatically via air supply or manually via a lever. It does not clamp at arbitrary mid-stroke positions.
Related AirTAC Lock & Standard Cylinders
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