Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-50 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 SAIJ40AX900-50
The AirTAC SAIJ40X900-50 is a double-acting, single-rod ISO 15552 profile cylinder engineered with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a 900mm nominal stroke that can be fine-tuned backward by up to 50mm, yielding an effective 850-900mm travel window for precise end-position calibration.
This variant is built with a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and operates at speeds of 30-800mm/s. The extruded aluminum barrel includes sensor grooves on both sides, allowing for the direct mounting of CMSE reed or DMSE electronic sensors if a magnet is added later.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-50 |
|---|---|
| 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 SAIJ40AX900-50
| 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 SAIJ40AX900-50 Is Used
Machine Changeover
Dial in the 850-900mm retract position during product family changeovers without swapping out the entire cylinder or reengineering fixed mechanical stops.
Long-Stroke Diverting
Precisely tunes the end-of-stroke stopping point for long-trroke conveyor sorting arms, ensuring packages are pushed the exact distance required.
Assembly Calibration
Micro-adjust the retract distance during machine commissioning to perfectly seat components, absorbing minor mechanical tolerances over the 900mm travel.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-50 the Right Cylinder?
Choose this 40mm bore when an application requires moderate thrust (628N push at 0.5 MPa) and exact retract positioning without external stops; if you need greater force, stepping up to the 50mm bore provides 982N. The rear adjuster screw acts purely as a travel stop to dial in the 850-900mm window during commissioning, meaning it cannot hold the load dynamically without live air—true load-holding requires a SAIL pneumatic lock or an external rod lock.
Because the 900mm stroke is long, the 16mm rod and M12x1.25 thread will still experience leverage forces under side loading, so an external guide rail is highly recommended to prevent premature seal wear. For a seamless ISO 15552 replacement, match the 40mm bore, 900mm stroke, 50mm adjustment, PT tapered ports, and the required mounting subset (Basic, FA, LB, TC, FTC, TCM1, or TCM2).
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 SAIJ40AX900-50 FAQ
It features a rear mechanical stopper that allows you to shorten the effective stroke by up to 50mm. This creates an adjustable 850-900mm travel window, letting you fine-tune the end position at commissioning without altering the cylinder mounting.
At 0.5 MPa operating pressure, the SAIJ40X900-50 provides 628N of push force and 528N of pull force. It can reach up to 1130N push force at 0.9 MPa.
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