Airtac SAILB Rear Lock Cylinder SAILB100X75
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB100X75 is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 75mm 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
- Stroke75 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 SAILB100X75
The AirTAC SAILB100X75 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 to hold the rod securely at the retracted stroke end whenever the release air is cut, maintaining the load without live pressure. In the 100mm bore class, it delivers a push force of 3927N and a pull force of 3681N at 0.5MPa, making it well-suited for heavy vertical lifting tasks.
The cylinder features a carbon steel rod and a 1/2 inch PT tapered port. To accommodate the internal locking hardware, the variable air cushion at the locker end is notably shorter at 24mm compared to the 36mm cushion length on the free end. For position sensing, you can add a magnet (-S) to use with AirTAC CMSE reed or DMSE electronic sensors.
Airtac SAILB Rear Lock Cylinder SAILB100X75 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X75 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 75 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 SAILB100X75 Is Used
Vertical Lift Safety
Holds a lifted load securely at the retracted stroke end on the back cover side, preventing sudden drops if air pressure is lost.
Clamp and Hold
Maintains a 3927N clamping force at the rod-in position without consuming continuous air, saving energy during extended hold times.
Power Failure Protection
The spring-applied lock engages instantly upon air loss, keeping heavy gates or safety doors securely closed until release air is restored.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X75 the Right Lock Cylinder?
Choose the SAILB100X75 when your application requires a robust 100mm bore and failsafe holding at the fully retracted position. If your load demands less force, stepping down to the 80mm bore yields 2513N of push force at 0.5MPa; conversely, moving up to the 125mm bore provides 6136N. If your mechanism needs to lock at an arbitrary mid-stroke point rather than the stroke end, select the BSAI clamp-lock cylinder instead.
Remember that this SAIL lock is a static holding device, not a dynamic brake for a moving rod. Avoid using fast-exhaust valves with this cylinder; back-pressure on the locker side can unintentionally release the lock, so an independent-exhaust solenoid valve is required. For any human-safety-critical lifting, always add an independent safety measure. When replacing this unit, match the 100mm bore, 75mm stroke, back locker position, PT port, and your required mounting accessories. The 75mm stroke is short enough that side-load guide concerns are minimal, but standard mount alignment remains important.
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 SAILB100X75 FAQ
At 0.5MPa operating pressure, the 100mm bore provides 3927N of push force and 3681N of pull force. At 0.7MPa, the push force increases to 5497N.
The lock is spring-applied and air-released, holding the rod statically at the retracted stroke end. It is not a mid-stroke clamp or dynamic brake. You can unlock it automatically by supplying release air, or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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