Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X800S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X800S is a genuine double-acting ISO 15552 profile cylinder with a Ø63mm bore, 800mm 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
- Stroke800 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 SAILF63X800S
The AirTAC SAILF63X800-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. Because this is a SAILF variant, the spring-applied, air-released lock engages automatically when the piston reaches the extended stroke end, securely holding the rod-out position without requiring continuous live air pressure. A 63mm bore generates 1559N of push force and 1402N of pull force at 0.5 MPa, making it highly capable for substantial vertical load management. The carbon steel rod provides durable, rigid performance, and the integrated -S magnet allows precise position tracking using AirTAC CMSE reed or DMSE electronic solid-state sensors.
This unit operates at speeds from 30 to 800 mm/s and includes variable air cushions at both ends. Notably, the cushion at the locker end is shorter at 21mm compared to 30mm on the free end, a specific design adjustment to accommodate the locking hardware. The lock itself is a static holding device that engages only after the cylinder has fully stopped; it is not a dynamic brake for a moving rod. If your process requires clamping at an arbitrary mid-stroke point rather than the extended terminal, you must use a BSAI clamp-lock cylinder instead.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X800S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X800S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø63 mm |
| Stroke | 800 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 SAILF63X800S Is Used
Extended Lift Holding
Maintains a vertical load securely at the full extended stroke end during a power loss, utilizing the front mechanical lock to prevent gravity-induced drops.
Pallet Stop Gate
Acts as a high-cycle pallet stop on a conveyor line, holding the extended gate position rigidly without consuming compressed air during the dwell time.
Safety Guard Barrier
Keeps a machine safety barrier locked in the open, extended position until the air-released lock is deliberately disengaged, ensuring secure access control.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X800S the Right Lock Cylinder?
Choose this 63mm bore when a 50mm bore (offering 982N push at 0.5 MPa) lacks sufficient lifting power, but a 80mm bore (2513N push) is physically oversized or unnecessary. The SAILF configuration is specifically selected when the application demands the load be held securely at the extended rod-out position, whereas a SAILB variant would hold the retracted rod-in position. For this 800mm stroke, which is the maximum standard stroke for this bore, the extended rod length makes the cylinder highly susceptible to side-loading; always utilize a dedicated external linear guide to prevent rod binding and premature seal wear.
When integrating this cylinder, adhere strictly to the valve-selection red-line: never use a fast-exhaust valve with a lock cylinder. You must use an independent or individual-exhaust solenoid valve, because uncontrolled back-pressure on the locker side can unintentionally release the spring-applied lock. While the lock holds the load without live pressure, if human safety depends on the load remaining extended, add an independent mechanical safety measure as well. To replace this unit, match the 63mm bore, 800mm stroke, front locker position, PT tapered port threads, and the -S magnet specification.
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 SAILF63X800S FAQ
At an operating pressure of 0.5 MPa, this 63mm bore cylinder generates 1559N of push force and 1402N of pull force. At 0.7 MPa, the push force increases to 2182N.
The lock is spring-applied and engages automatically when the piston reaches the extended stroke end, holding the load statically without live pressure. It releases automatically by supplying air to the release port, or manually via the release lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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