Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X400S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X400S is a genuine double-acting ISO 15552 profile cylinder with a Ø63mm bore, 400mm 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
- Stroke400 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 SAILF63X400S
The AirTAC SAILF63X400-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock inside the front cover. Because this is a SAILF variant, the spring-applied, air-released lock engages only when the piston reaches the extended rod-out stroke end. Generating 1559N of push force at 0.5MPa, it uses a carbon steel rod and includes a magnet for CMSE reed and DMSE electronic sensors. The lock safely holds the load without requiring live pressure.
Unlike a plain SAI cylinder, this unit provides true static load-holding upon power loss. The variable air cushion at the locker end is 21mm, intentionally shorter than the 30mm cushion on the free end to accommodate the locking hardware. Remember that the lock engages after the cylinder stops; it is not a dynamic brake for a moving rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X400S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X400S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø63 mm |
| Stroke | 400 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 SAILF63X400S Is Used
Vertical Lift Hold
Secures an extended vertical lift in place automatically when air pressure is cut, preventing sudden drops during power loss.
Transfer Gate Stop
Locks a conveyor diverter gate open at the extended stroke end without consuming continuous compressed air.
Clamp and Hold
Maintains a clamped workpiece securely at the rod-out terminal position while machining forces are applied.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X400S the Right Lock Cylinder?
Choose this 63mm bore when an application requires holding a load at the fully extended position without continuous air supply. If you need higher force, stepping up to an 80mm bore yields 2513N at 0.5MPa. If the load must be clamped at an arbitrary mid-stroke point rather than the stroke terminal, select a BSAI clamp-lock cylinder instead.
For safe operation, do not use a fast-exhaust valve, as back-pressure on the locker side can unintentionally release the lock; an independent-exhaust solenoid valve is required. The 400mm stroke on this model necessitates a side-load guide to prevent rod bending. To replace this unit, match the 63mm bore, 400mm stroke, front locker position, PT port threads, and the -S magnet option. If human safety depends on the load staying up, add an 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 SAILF63X400S FAQ
At 0.5MPa, the push force is 1559N and the pull force is 1402N. At 0.7MPa, the push force increases to 2182N.
The lock is spring-applied and air-released. It engages statically at the extended stroke end to hold the load without live pressure. To unlock, supply release air or use the manual override lever.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X400S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.