Airtac SAILB Rear Lock Cylinder SAILB200X700
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB200X700 is a genuine double-acting ISO 15552 profile cylinder with a Ø200mm bore, 700mm 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
- Stroke700 mm
- Port sizeG3/4
- Lock positionBack cover
- Rod threadM36×2
- UnlockAir + manual
About the Airtac SAILB Rear Lock Cylinder SAILB200X700
The AirTAC SAILB200X700 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the back cover. This lock engages automatically when the piston reaches the retracted stroke end, securely holding the load without requiring continuous live air pressure. With a robust 200mm bore, it generates 15708 Newtons of push force and 15080 Newtons of pull force at a 0.5 MPa operating pressure.
The 40mm carbon steel rod and M36x2 thread provide substantial structural integrity for heavy-duty guiding. At the locker end, the variable air cushion is notably shorter at 28mm compared to the 50mm cushion on the free end. This unit operates effectively at speeds between 30-500 mm/s and uses a 3/4 PT tapered port thread.
Airtac SAILB Rear Lock Cylinder SAILB200X700 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB200X700 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø200 mm |
| Stroke | 700 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 SAILB200X700 Is Used
Heavy Press Hold
Maintains immense clamping pressure on large fabricated components at the retracted stroke end during power loss.
Vertical Lift Safety
Prevents massive lifted platforms from crashing downward by mechanically locking the rod instantly upon retraction.
Machine Guard Retain
Secures heavy industrial safety barriers in the closed position without consuming continuous pneumatic energy.
Is the Airtac SAILB Rear Lock Cylinder SAILB200X700 the Right Lock Cylinder?
Choose this 200mm bore model when your application demands extremely high thrust, stepping up from the 160mm bore which provides 10053N push at 0.5 MPa. Select the SAILB configuration specifically because the load must be secured at the retracted rod-in position; choose SAILF instead if the extended rod-out position must be held. If your requirement involves clamping at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice. Keep in mind the SAIL lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Because this is a 700mm stroke, ensure external guide shafts are used to prevent excessive side-load wear on the barrel seals. For replacements, match the 200mm bore, 700mm stroke, back locker position, 3/4 PT port, and mounting style. Avoid using fast-exhaust valves with this cylinder; an independent-exhaust solenoid valve is required because back-pressure on the locker side can unintentionally release the lock. If human safety depends on the load remaining elevated, always add an independent mechanical safety measure.
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 SAILB200X700 FAQ
At 0.5 MPa, this 200mm bore cylinder provides 15708 Newtons of push force and 15080 Newtons of pull force. At the maximum 1.0 MPa operating pressure, it delivers up to 3204 kgf.
The spring-applied lock in the back cover engages only when the piston reaches the retracted stroke end, holding the load statically without live air. To unlock, supply air to the release port for automatic release or use the manual release lever. It is not a mid-stroke clamp; for arbitrary positions, use BSAI.
Related AirTAC Lock & Standard Cylinders
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