Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X350S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X350S 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 SAILF63X350S
The AirTAC SAILF63X350-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released mechanical lock in the front cover. This lock engages automatically to hold the rod securely at the fully extended stroke end whenever the release air is cut, maintaining the load position without consuming live pressure. With a 63mm bore, it generates 1559N of push force at 0.5MPa and features a carbon steel rod with a 3/8 PT port.
Because the lock occupies the front cover, the variable air cushion on that locker end is shorter at 21mm compared to the 30mm cushion on the free end. The integrated magnet enables position detection with AirTAC CMSE reed or DMSE electronic sensors. Remember that the lock is a static holding device for use after the cylinder stops, not a dynamic brake for a moving rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X350S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X350S |
|---|---|
| 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 SAILF63X350S Is Used
Vertical Lift Holding
Secures elevated platforms or forks at the fully extended stroke end, preventing gravity-driven falls during a compressed air power loss.
Pallet Stop Gate
Extends a physical stop block into a conveyor line and locks it out at the forward stroke end to halt heavy pallet traffic without live air.
Safety Barrier Actuation
Pushes a guard or safety door into the extended protective position and holds it rigidly there, requiring an air signal to unlock and retract.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X350S the Right Lock Cylinder?
Choose this 63mm bore model when an application requires 1559N of push force at 0.5MPa to extend and securely hold a load at the forward end; if your process needs less force, the 50mm bore offers 982N, while the 80mm bore provides 2513N for heavier lifts. Select this SAILF front-lock variant specifically to hold the rod in the extended position, whereas a SAILB back-lock version holds the retracted position. If your design requires clamping and holding at an arbitrary mid-stroke point rather than the stroke end, the AirTAC BSAI clamp-lock cylinder is the correct choice.
For safe operation, never use a fast-exhaust valve with this lock cylinder; always install an independent-exhaust solenoid valve, as back-pressure on the locker side can unintentionally release the lock. At 350mm stroke, the extended rod is susceptible to side-loading, so ensure adequate guide support to prevent cylinder damage. When replacing this unit, match the 63mm bore, 350mm stroke, front locker position, 3/8 PT ports, and the -S magnet. Safety-critical loads staying up require an additional independent safety measure.
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 SAILF63X350S FAQ
At 0.5MPa operating pressure, this 63mm bore cylinder provides 1559N of push force and 1402N of pull force. It can deliver up to 2182N of push force at 0.7MPa.
The lock is spring-applied and air-released, engaging only when the piston reaches the fully extended stroke end in the front cover. It provides a static hold after the cylinder stops, not a mid-stroke clamp or dynamic brake, and unlocks via an air signal or manual lever.
Related AirTAC Lock & Standard Cylinders
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