Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X800
The AirTAC SAILF Front Locking Pneumatic Cylinder SAILF63X800 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 SAILF63X800
The AirTAC SAILF63X800 is a double-acting ISO 15552 profile cylinder featuring a mechanical lock integrated into the front cover. Because this is a SAILF variant, the spring-applied, air-released lock engages when the piston reaches the extended stroke end, securely holding the load without requiring continuous air pressure. At 0.5 MPa, it generates 1559 N of push force and 1402 N of pull force, operating efficiently between 30-800 mm/s.
This model features a 3/8 PT tapered port and a 20 mm carbon steel rod. The variable air cushion at the front lock end is 21 mm, intentionally shorter than the 30 mm cushion at the rear free end to accommodate the locking mechanism. For position sensing, adding a magnet (-S) allows the use of CMSE reed or DMSE solid-state sensors in the dual-side barrel grooves.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X800 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X800 |
|---|---|
| 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 SAILF63X800 Is Used
Vertical Lift Safety
Holds a lifted platform securely at the extended stroke end during a power loss, preventing sudden drops without needing live air pressure.
Pallet Stopper
Extends to halt heavy pallets on a line and locks at the extended end to resist impact forces while the load is processed.
Clamp and Hold Fixture
Applies 1559 N of push force at 0.5 MPa to position a workpiece and locks it at the extended terminal to maintain positioning securely.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X800 the Right Lock Cylinder?
Choose this 63 mm bore when a 50 mm bore (offering 982 N push at 0.5 MPa) is insufficient, but an 80 mm bore (2513 N push) would be excessive. Select SAILF over SAILB when the application specifically requires the load to be held at the extended rod-out position rather than the retracted position. If your process requires clamping at an arbitrary mid-stroke point rather than a stroke-end hold, the BSAI clamp-lock cylinder is the correct alternative. Remember that the SAIL lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod.
For this 800 mm stroke model, using a side-load guide is recommended to prevent excessive wear on the rod and seals. To maintain lock integrity, avoid using fast-exhaust valves; an independent-exhaust solenoid valve is required because back-pressure on the locker side can inadvertently release the lock. Always confirm the exact lock holding force from the official datasheet, and if human safety depends on the load staying elevated, install an independent mechanical safety measure. Replacement parts must match the 63 mm bore, 800 mm stroke, front lock position, PT port thread, and standard mounting options like FA, FB, LB, or 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 SAILF63X800 FAQ
At 0.5 MPa, the 63 mm bore provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force is 2182 N, and at 0.9 MPa it reaches 2805 N.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end. It provides a static hold after the rod stops, not a mid-stroke clamp or dynamic brake. Unlocking is done automatically via air supply or manually via a lever.
Related AirTAC Lock & Standard Cylinders
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