Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-50S
The AirTAC SAIJ40X900-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing an 850-900mm usable travel window. Delivering 879N of push force at 0.7 MPa, it is built with an SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance. The extruded aluminum barrel features sensor grooves on both sides, and the integrated magnet (-S) supports precise position detection.
This model uses PT tapered port threads (G1/4) and includes variable air cushions at both ends to manage deceleration. The rear mechanical stopper allows you to trim the effective stroke by up to 50mm during commissioning without swapping out the entire cylinder. It accepts AirTAC CMSE reed and DMSE electronic solid-state sensors.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 900 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 SAIJ40AX900-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×900 | 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 SAIJ40AX900-50S Is Used
Product Changeovers
Quickly dial in the 850-900mm travel window during format size changes without installing external physical stops.
Long-Stroke Diverting
Adjusts the retract end-position precisely for varying package lengths on a 40mm bore sorting line.
Machine Setup
Fine-tune the end of stroke during initial commissioning to perfectly time the 879N push motion.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-50S the Right Cylinder?
Selecting this 40mm bore over a smaller 32mm variant increases your push thrust from 563N to 879N at 0.7 MPa, while stepping up to a 50mm bore yields 1374N. The adjustable stroke is ideal for production lines requiring frequent product changeovers, allowing you to set variable end stops on the fly. For load-holding without live air pressure, you must use an external rod lock or pilot-operated check valve, as the rear adjuster functions only as a travel stop.
When replacing an ISO 15552 cylinder, match the 40mm bore, 900mm stroke, 50mm adjustment range, PT G1/4 port, and -S magnet. Because the 900mm stroke is long and the 16mm rod has limited side-load capacity, an external guide rail is required to prevent rod binding. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR.
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 SAIJ40AX900-50S FAQ
At 0.7 MPa operating pressure, this 40mm bore cylinder provides 879N of push force and 528N of pull force. It can reach a maximum push force of 1130N at 0.9 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the 900mm nominal stroke by up to 50mm, creating an 850-900mm travel window. It sets the end position but does not lock the load without live air.
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