Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 950mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke950 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-50
The AirTAC SAIJ40X950-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 900-950mm usable travel window. Delivering 628N of push force at 0.5 MPa, it uses a 16mm SUS420J2 stainless steel rod with an M12x1.25 thread to handle higher side loads. The extruded aluminum barrel includes sensor grooves on both sides for flexible positioning.
This model uses PT tapered G1/4 ports and adjustable air cushions at both ends to absorb kinetic energy. The rear stopper allows precise end-position tuning during commissioning without adding external physical stops, while the reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) omits heavy pivot brackets.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 950 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×950 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-50 Is Used
Product Changeovers
Dial the stroke back by up to 50mm during machine setup to accommodate varying product lengths without replacing the cylinder.
Variable End Stops
Fine-tune the exact retraction point of a 950mm stroke to align pushers perfectly with moving conveyor materials.
Long-Stroke Assembly
Use the 900-950mm travel window to press or position components across a wide working area with precision.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-50 the Right Cylinder?
Choose this 40mm bore when a 32mm bore (providing 402N push force) is insufficient, but you want to avoid stepping up to a 50mm bore (982N) to save space. The 50mm adjustment range is ideal for product changeovers on a line, letting you dial back the 950mm stroke to exactly 900mm without swapping the cylinder.
Because the 950mm stroke is long, an external guide is recommended to prevent rod binding despite the robust 16mm rod. Note that the rear adjuster is a travel stop, not a lock; it will not hold the load without live air. For true load-holding without pressure, use an external rod lock or pilot-operated check valve. Dimensionally interchangeable with ISO 15552 cylinders, it accepts PT port threads and works with CMSE reed or DMSE electronic sensors if a magnet is added.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-50 FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 128 kgf.
The rear adjuster acts as a mechanical stop that shortens the effective stroke from 950mm down to a minimum of 900mm. It allows you to fine-tune the end position at commissioning, but it does not lock the load without live air pressure.
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