Airtac SAILB Rear Lock Cylinder SAILB63X80S
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB63X80S 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 back cover — it holds the load at the retracted (rod-in) stroke end even when air is lost.
- BoreØ63 mm
- Stroke80 mm
- Port sizeG3/8
- Lock positionBack cover
- Rod threadM16×1.5
- UnlockAir + manual
About the Airtac SAILB Rear Lock Cylinder SAILB63X80S
The AirTAC SAILB63X80-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the back cover. Because the lock is spring-applied and air-released, it safely holds the rod at the retracted stroke end without requiring continuous live pressure. Delivering 1559N of push thrust at 0.5MPa, this carbon-rod unit is designed for secure vertical load holding.
The integrated lock engages statically after the piston stops, rather than acting as a dynamic brake mid-stroke. Notably, the variable air cushion at the locker end is 21mm, which is shorter than the 30mm cushion on the free end. Equipped with a magnet, it supports CMSE reed and DMSE electronic sensors for precise position verification.
Airtac SAILB Rear Lock Cylinder SAILB63X80S Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB63X80S |
|---|---|
| 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 (back 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 retracted (rod-in) 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 back-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 SAILB Rear Lock Cylinder SAILB63X80S Is Used
Vertical Load Holding
Secures lifted loads safely at the retracted stroke end whenever compressed air or electrical power is lost.
End-of-Stroke Clamping
Holds workpieces firmly in place at the rod-in position during processing to prevent mechanical drift.
Safety Gate Hold
Keeps heavy safety gates and barriers locked closed until the release air is actively supplied.
Is the Airtac SAILB Rear Lock Cylinder SAILB63X80S the Right Lock Cylinder?
Choose this 63mm bore model when a 50mm bore (offering 982N push at 0.5MPa) is insufficient, or step up to an 80mm bore if you need 2513N. Select the SAILB configuration when the load must be held at the retracted rod-in position; choose SAILF for holding at the extended end. If your application requires clamping at an arbitrary mid-stroke point, select the BSAI clamp-lock cylinder instead. For replacements, verify the 80mm stroke, 3/8 PT port, and your required mounting style. Always avoid fast-exhaust valves, as back-pressure on the locker side can unintentionally release the lock.
Quick checklist
- ✓ Hold needed at the retracted (rod-in) end?
- ✓ Or lock anywhere → use BSAI
- ✓ Independent-exhaust valve fitted
- ✓ Port/thread type (PT/G)
- ✓ Extra safety measure for people
Airtac SAILB Rear Lock Cylinder SAILB63X80S FAQ
At 0.5MPa, this 63mm bore cylinder provides 1559N of push thrust and 1402N of pull thrust. It achieves 2805N push at 0.9MPa.
The lock is spring-applied and air-released, holding the rod statically at the retracted stroke end. It unlocks automatically via air supply or manually via a lever, but it cannot clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILB Rear Lock Cylinder SAILB63X80S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.