Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X80S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X80S is a genuine double-acting ISO 15552 profile cylinder with a Ø63mm bore, 80mm 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
- Stroke80 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 SAILF63X80S
The AirTAC SAILF63X80-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released mechanical lock housed in the front cover. This mechanism holds the rod securely at the extended stroke end, maintaining load position without relying on continuous live air pressure. In the 63mm bore class, it generates 1559N of push force and 1402N of pull force at 0.5 MPa.
Because this variant includes the -S magnet option, it directly supports position sensing via AirTAC CMSE reed and DMSE electronic solid-state switches. A critical design detail is the variable air cushion: the cushion at the locker end measures 21mm, which is intentionally shorter than the 30mm cushion on the free end to accommodate the locking mechanism.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X80S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X80S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø63 mm |
| Stroke | 80 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 SAILF63X80S Is Used
Extended Load Holding
Secures vertical lifts in the rod-out position during power loss, preventing gravity-driven drops.
Safety Gate Interlock
Maintains a locked barrier at full extension until the air-release port is actively pressurized.
Clamp and Hold
Keeps a workpiece clamped at the forward stroke end without consuming continuous compressed air.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X80S the Right Lock Cylinder?
Select this 63mm bore cylinder when an application demands 1559N thrust at 0.5 MPa and safe load holding at the rod-out position; step down to a 50mm bore (982N push) for lighter loads, or up to an 80mm bore (2513N push) for heavier demands. Choose the SAILF front-locker configuration specifically to hold the extended stroke end, whereas a SAILB holds the retracted end. If your process requires clamping at an arbitrary mid-stroke point rather than a terminal position, the BSAI clamp-lock cylinder is the correct alternative.
Remember that this lock engages statically after the piston stops at the extended end; it is not a dynamic brake for a moving rod. Avoid using fast-exhaust valves, as back-pressure on the locker side can inadvertently release the lock; always use an independent-exhaust solenoid valve. For replacement, verify the 80mm stroke, front locker position, 3/8 PT port, and the -S magnet. The carbon steel rod provides durable performance, and the unit supports standard ISO 15552 mountings including FA, FB, LB, and TC.
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 SAILF63X80S FAQ
At 0.5 MPa operating pressure, the 63mm bore provides 1559N of push force and 1402N of pull force. At 0.7 MPa, the push force increases to 2182N.
The spring-applied, air-released lock engages statically when the piston reaches the extended stroke end in the front cover. It unlocks automatically via air pressure to the release port or manually via the lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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