Airtac SAILB Rear Lock Cylinder SAILB80X200S
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB80X200S is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 200mm 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.
- BoreØ80 mm
- Stroke200 mm
- Port sizeG3/8
- Lock positionBack cover
- Rod threadM20×1.5
- UnlockAir + manual
About the Airtac SAILB Rear Lock Cylinder SAILB80X200S
The AirTAC SAILB80X200-S is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock in the back cover. This lock engages automatically when the piston reaches the retracted stroke end, securely holding the load in place without requiring continuous live air pressure. It delivers a robust push force of 2513 N and pull force of 2268 N at 0.5 MPa, making it well-suited for heavy vertical load-holding tasks. The integrated magnet enables direct position sensing using AirTAC CMSE reed and DMSE solid-state switches.
Because the lock engages at the stroke terminal, the variable air cushion at the locker end is intentionally shorter at 22.5 mm compared to the 36 mm cushion on the free end. For safe operation, avoid using fast-exhaust valves, as back-pressure on the locker side can inadvertently release the lock; an independent-exhaust solenoid valve is required. The carbon steel rod and PT tapered ports are standard on this configuration.
Airtac SAILB Rear Lock Cylinder SAILB80X200S Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB80X200S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 200 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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 (36 mm free end / 22.5 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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 SAILB80X200S Is Used
Vertical Power-Off Safety
Prevents gravity-loaded vertical platforms from crashing down when air pressure drops by mechanically locking the rod in the retracted position.
Pallet Stop and Hold
Halts and securely locks a pallet at the end of the retraction stroke, maintaining its position without consuming continuous compressed air.
Machine Guard Retention
Keeps a heavy safety guard or gate firmly held in the closed position until the release air is actively supplied to unlock the mechanism.
Is the Airtac SAILB Rear Lock Cylinder SAILB80X200S the Right Lock Cylinder?
Choose this 80 mm bore when the 50 mm bore (offering 982 N push at 0.5 MPa) lacks sufficient lifting power, but the 100 mm bore (3927 N at 0.5 MPa) would be excessive overkill. Select the SAILB configuration when your application requires the load to be safely secured at the rod-in retracted position. If your mechanism must hold the load at the extended rod-out position instead, the SAILF variant is the correct choice. For applications requiring mid-stroke clamping at an arbitrary position rather than end-of-stroke holding, the BSAI clamp-lock cylinder is the appropriate solution.
Remember that this lock is a static holding device that engages only after the cylinder has stopped, not a dynamic brake for a moving rod. Safety-critical suspended loads should always use an independent mechanical backup. When replacing this unit, match the 80 mm bore, 200 mm stroke, back locker position, PT port threads, and the -S magnet option. The 200 mm stroke is within standard limits, but always ensure adequate guide support to prevent excessive side loads on the rod.
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 SAILB80X200S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides a push force of 2513 N and a pull force of 2268 N. At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The spring-applied lock engages automatically when the piston reaches the retracted stroke end in the back cover, holding the load without live pressure. To unlock, supply air to the release port or use the manual override. It is a static end-of-stroke hold, not a mid-stroke clamp.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILB Rear Lock Cylinder SAILB80X200S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.