Airtac SAILB Rear Lock Cylinder SAILB100X150
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB100X150 is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 150mm 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
- Stroke150 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 SAILB100X150
The AirTAC SAILB100X150 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock built into the back cover. This lock engages automatically when the piston reaches the retracted stroke end, securely holding the carbon steel rod in place without requiring live pressure. Delivering 5497N of push force at 0.7MPa, it provides robust load-holding for heavy machinery.
The lock is released by supplying air to the release port or by using the manual override lever. To ensure proper deceleration, the variable air cushion at the locker end is 36mm, which is shorter than the free end cushion. The extruded aluminum barrel includes sensor grooves on both sides for mounting CMSE reed or DMSE solid-state switches if a magnet is specified later.
Airtac SAILB Rear Lock Cylinder SAILB100X150 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X150 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 150 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 SAILB100X150 Is Used
Vertical Load Hold
Prevents heavy vertical loads from dropping on air pressure loss by locking securely at the retracted stroke end.
Clamp and Hold
Maintains high-force clamping pressure on heavy workpieces at the rod-in position without consuming continuous compressed air.
Lift Safety Stop
Secures lifted gates or platforms in the retracted position during power outages, requiring an independent backup for human safety.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X150 the Right Lock Cylinder?
Choose this 100mm bore when a 80mm bore (3518N push at 0.5MPa) lacks the necessary force, but a 125mm bore (8590N push at 0.5MPa) is oversized. Select the SAILB configuration when the load must be held safely at the rod-in position; use SAILF if the extended end requires holding. If your application requires clamping at an arbitrary mid-stroke point rather than a stroke-end static hold, use the BSAI clamp-lock cylinder instead.
For replacement, verify the 150mm stroke, 1/2 PT port, and back locker position. Avoid using fast-exhaust valves, as back-pressure on the locker side can unintentionally release the lock; an independent-exhaust solenoid valve is required. Because the lock is a static holding device and not a dynamic brake, add an independent safety measure for human-life-critical loads.
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 SAILB100X150 FAQ
At 0.7MPa operating pressure, this 100mm bore cylinder provides 5497N of push force and 3681N of pull force. It reaches a maximum of 801 kgf at 1.0MPa.
The lock is spring-applied and air-released, engaging only when the rod reaches the retracted stroke end. It is a static hold, not a mid-stroke clamp or dynamic brake. Unlock it automatically via air pressure or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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