Airtac SAILB Rear Lock Cylinder SAILB100X500
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB100X500 is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 500mm 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.
- BoreØ100 mm
- Stroke500 mm
- Port sizeG1/2
- Lock positionBack cover
- Rod threadM20×1.5
- 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 SAILB Rear Lock Cylinder SAILB100X500
The AirTAC SAILB100X500 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the back cover. This built-in lock engages automatically when the piston reaches the retracted stroke end, securely holding the load without requiring live air pressure. In the 100mm bore class, it generates 3927N of push force and 3681N of pull force at 0.5 MPa, making it well-suited for heavy industrial positioning tasks.
A key mechanical detail is that the variable air cushion at the locker end is 24mm, intentionally shorter than the 36mm cushion on the non-lock front end to accommodate the locking mechanism. The standard carbon steel rod provides robust durability, and the 1/2-inch PT tapered port handles the required airflow. For position sensing, you can add a magnet (-S) to use electronic DMSE or reed CMSE switches in the dual sensor grooves.
Airtac SAILB Rear Lock Cylinder SAILB100X500 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X500 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 500 mm |
| Acting type | Double acting, with lock |
| Port size | G1/2 |
| 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 / 24 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SAILB100X500 Is Used
Vertical Lift Safety
Holds a heavy vertical load securely in the retracted position instantly if air pressure drops, preventing sudden falls on heavy machinery.
Clamp-and-Hold Jigs
Maintains high clamping force at the rod-in stroke end without consuming continuous air, saving energy during extended machining cycles.
Gate Positioning
Secures heavy safety gates or industrial doors in the closed position mechanically, ensuring they remain shut during a full power outage.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X500 the Right Lock Cylinder?
Choose this 100mm bore when you need substantial thrust, stepping up from the 80mm bore which provides 2513N push at 0.5 MPa. Select the SAILB configuration specifically because your application requires the load to be safely secured at the rod-in retracted position; if you need the rod held extended, the SAILF variant is the correct choice. Remember that this lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod.
If your workflow demands locking at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is required instead. For this 500mm stroke, ensure external guide rails are used to prevent excessive side loads on the rod. Critical valve selection: do not use a fast-exhaust valve, as back-pressure on the locker side can unintentionally release the lock; use an independent-exhaust solenoid valve. For human-safety critical suspended loads, always add an independent mechanical safety measure. Replacement match: 100mm bore, 500mm stroke, back locker, PT port, standard mounting.
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 SAILB100X500 FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At 0.7 MPa, the push force increases to 5497N.
The lock is spring-applied and air-released, located in the back cover. It engages statically only when the piston reaches the retracted stroke end, holding the load without live pressure. To unlock, you supply air to the release port for automatic unlocking or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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