Airtac SAILB Rear Lock Cylinder SAILB200X160S
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB200X160S is a genuine double-acting ISO 15552 profile cylinder with a Ø200mm bore, 160mm 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.
- BoreØ200 mm
- Stroke160 mm
- Port sizeG3/4
- Lock positionBack cover
- Rod threadM36×2
- UnlockAir + manual
About the Airtac SAILB Rear Lock Cylinder SAILB200X160S
The AirTAC SAILB200X160-S is a double-acting ISO 15552 profile cylinder with a built-in mechanical lock in the back cover. A spring-applied, air-released pin engages when the piston reaches the retracted stroke end, holding heavy loads securely without live pressure. In this 200mm bore class, it generates 15708N of push force and 15080N of pull force at 0.5 MPa, scaling up to 21991N push at 0.7 MPa. You can unlock it automatically by supplying release air to the port, or use the manual override lever.
Because the lock physically clamps the carbon steel rod at stroke termination, the variable air cushion at the locker end is notably shorter (28mm versus 50mm at the free end). Position feedback relies on the integrated -S magnet, which pairs directly with AirTAC CMSE reed and DMSE electronic solid-state sensors seated in the dual-side barrel grooves. The fluid supply connects via 3/4 PT tapered ports, and the unit operates reliably across a 30-500 mm/s speed range.
Airtac SAILB Rear Lock Cylinder SAILB200X160S Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB200X160S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø200 mm |
| Stroke | 160 mm |
| Acting type | Double acting, with lock |
| Port size | G3/4 |
| Rod thread | M36×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable (50 mm free end / 28 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 (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 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 SAILB200X160S Is Used
Heavy Vertical Lift Hold
Secures massive vertical loads in the retracted position during a power loss, preventing catastrophic drops without relying on continuous air pressure.
Press Clamp Retention
Maintains high-force clamping pressure on large fabricated parts at the rod-in stroke end while downstream operations complete safely.
Overhead Crane Stop
Locks heavy gate or crane mechanisms firmly at the retracted terminal to secure loads during maintenance or emergency air cutoffs.
Is the Airtac SAILB Rear Lock Cylinder SAILB200X160S the Right Lock Cylinder?
Select this 200mm bore model when an application demands immense thrust and fail-safe retracted holding; if you need less force, stepping down to the 160mm bore yields 10053N push at 0.5 MPa. Choose this SAILB variant specifically to hold the rod-in position, whereas the SAILF equivalent secures the extended end. If your process requires clamping at an arbitrary mid-stroke point rather than a terminal static hold, the BSAI clamp-lock cylinder is the correct alternative.
Remember that this lock engages only after the cylinder stops, meaning it is not a dynamic brake for moving rods. Valve selection is critical: never use a fast-exhaust valve, and always fit an independent-exhaust solenoid valve, because back-pressure on the locker side can unintentionally release the pin. For any safety-critical lifting application where human safety depends on the load staying up, add an independent mechanical safety measure beyond the cylinder lock. To match this unit for replacement, specify the 200mm bore, 160mm stroke, back locker position, 3/4 PT ports, and the -S magnet option.
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 SAILB200X160S FAQ
At 0.5 MPa operating pressure, the 200mm bore provides 15708N of push force and 15080N of pull force. This scales to 21991N push at 0.7 MPa, with a maximum rated thrust of 3204 kgf at 1.0 MPa.
The lock is spring-applied and air-released, located in the back cover to hold the rod exclusively at the retracted stroke end. It engages statically after the piston stops and is released automatically via air supply or manually via a lever; it does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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