Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X350S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X350S is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 350mm 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
- Stroke350 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 SAILF50X350S
The AirTAC SAILF50X350-S is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. Because the lock engages at the extended stroke end, it secures the rod-out position to maintain load safety during a pressure drop. With a 50 mm bore, it generates 982 N of push force and 825 N of pull force at 0.5 MPa. The integrated -S magnet enables position detection using AirTAC CMSE reed or DMSE electronic solid-state sensors.
This model utilizes a carbon steel piston rod and PT tapered port threads. A key design detail is that the variable air cushion at the locker end is shorter (20 mm) than the free end cushion (30 mm); the cushion decelerates the stroke, but the lock provides the actual static holding force. The lock releases automatically via air supply or manually via a lever, though it is strictly a stroke-end holding device, not a dynamic brake for a moving rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X350S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X350S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 350 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 SAILF50X350S Is Used
Vertical Lift Safety
Holds an extended vertical load safely in place if air pressure drops, preventing sudden crashes on lifting platforms.
Extended Push Hold
Maintains outward clamping pressure on a conveyor diverter without consuming continuous live air pressure.
Gate Guard Locking
Secures a safety gate in the open rod-out position until the release air is actively supplied to unlock it.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X350S the Right Lock Cylinder?
Select this 50 mm bore model when an application demands 982 N of thrust at 0.5 MPa with positive holding at the rod-out position. If your load requires less force, stepping down to a 40 mm bore yields 628 N of push force; if more power is needed, a 63 mm bore provides 1559 N. Choose this SAILF configuration for extended-end holding, whereas a SAILB variant holds the retracted position. If the mechanism requires clamping at an arbitrary mid-stroke point rather than the terminal end, the BSAI clamp-lock cylinder is the correct choice instead.
For reliable lock operation, avoid fast-exhaust valves, as back-pressure on the locker side can inadvertently release the lock; use an independent-exhaust solenoid valve instead. Because human safety must not rely on the lock alone, add an independent safety measure for critical elevated loads. At 350 mm of stroke, ensure external guide rails are used to prevent excessive side-loading on the carbon steel rod. Replacement matches require identical bore, stroke, front locker position, PT threads, and the -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 SAILF50X350S FAQ
At 0.5 MPa operating pressure, the 50 mm bore generates 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
The spring-applied, air-released lock engages only at the extended stroke end to hold the load statically without live pressure. It unlocks via air supply or a manual lever, but it cannot clamp at a mid-stroke position.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X350S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.