Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X350
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X350 is a genuine double-acting ISO 15552 profile cylinder with a Ø63mm 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.
- BoreØ63 mm
- Stroke350 mm
- Port sizeG3/8
- 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 SAILF63X350
The AirTAC SAILF63X350 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. This mechanism engages automatically when the piston reaches the extended stroke end, securely holding the rod-out position without requiring live air pressure. In the 63 mm bore class, it generates 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it well-suited for rigid vertical load holding.
Unlike a plain SAI cylinder, this model safely retains the load upon power loss. The lock is strictly a static holding device for the stroke terminal, not a dynamic brake for a moving rod. To accommodate the locking hardware, the variable air cushion at the front locker end is shorter (21 mm) compared to the 30 mm cushion at the rear free end. The standard carbon steel rod and PT tapered port threads ensure robust physical integration into existing pneumatic setups.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X350 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X350 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø63 mm |
| Stroke | 350 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| 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 / 21 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SAILF63X350 Is Used
Extended Load Holding
Secures vertical lifts in the rod-out position, preventing collapses during power loss without needing continuous air pressure.
Pallet Stop Gate
Maintains an extended pallet stop on a conveyor line, holding firmly at the stroke end until the release air is supplied.
Safety Guard Position
Keeps a machine safety guard locked open at the extended terminal, requiring an intentional air signal to unlock and close.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X350 the Right Lock Cylinder?
Select this 63 mm bore cylinder when an application requires a reliable extended-position hold, delivering 1559 N push at 0.5 MPa. If your setup demands holding the retracted rod-in position instead, choose the SAILB63X200. For applications requiring the load to be clamped at an arbitrary mid-stroke point rather than only at the end, the BSAI clamp-lock cylinder is the correct choice. Stepping up to an 80 mm bore increases the push force to 2513 N at 0.5 MPa if greater thrust is necessary.
Because this model features a 350 mm stroke, incorporating external linear guides is highly recommended to prevent excessive side-loading on the rod. The lock engages only after the cylinder has stopped at the extended end; it will not decelerate a moving load. Crucially, avoid using fast-exhaust valves with this cylinder, as back-pressure on the locker side can inadvertently release the lock—use an independent-exhaust solenoid valve instead. If human safety depends on the load remaining elevated, always add an independent mechanical safety measure. Replacement specifications must match the 63 mm bore, 350 mm stroke, front locker position, PT port threads, and standard mounting options.
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 SAILF63X350 FAQ
At 0.5 MPa operating pressure, the SAILF63X350 provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
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 without live pressure, and unlocks via automatic air release or a manual release lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X350
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.