Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75S 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 SAIJ40AX900-75S
The AirTAC SAIJ40X900-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the travel by up to 75 mm. This yields an effective usable window of 825-900 mm, letting you fine-tune the retract end position during commissioning without adding external stops. It delivers 879 N of push force at 0.7 MPa and uses a G1/4 port.
This unit features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and runs at 30-800 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, and because this is an -S model, it includes a magnet ready for CMSE reed and DMSE solid-state switches. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75S |
|---|---|
| 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 SAIJ40AX900-75S
| 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 SAIJ40AX900-75S Is Used
Product Changeover
Dial in the exact retract position within the 825-900 mm window when switching packaging sizes on a line, avoiding physical cylinder swaps.
Extended Reach Pushing
Pushes parts along a lengthy conveyor using the 900 mm stroke, relying on the stainless rod for durability in mildly humid environments.
Commissioning Calibration
Fine-tune the final end-stop during machine setup to absorb mechanical tolerance stack-up across long travel distances.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75S the Right Cylinder?
Choose this 40 mm bore when your application needs around 879 N of push force at 0.7 MPa, offering a middle ground between the 32 mm bore (402 N at 0.5 MPa) and the 50 mm bore (982 N at 0.5 MPa). The adjustable stroke is ideal for production lines requiring variable end-stops or product-size changeovers, providing flexibility a fixed-stroke SAI cylinder cannot match. Because the nominal stroke is 900 mm, an external guide is highly recommended to prevent excessive side-loading on the rod.
For ISO 15552 replacement matching, ensure you specify the 900 mm nominal stroke, 75 mm adjustment range, PT tapered port threads, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR configurations. If your machine requires true load-holding without live air pressure, this cylinder is not a lock; consider an AirTAC SAIL or BSAI series instead.
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 SAIJ40AX900-75S FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. The maximum push force is 1130 N at 0.9 MPa.
The rear adjuster screw lets you shorten the 900 mm nominal stroke by up to 75 mm, creating a usable travel window of 825-900 mm. It functions as a mechanical stop to fine-tune the end position and does not lock the load without continuous air pressure.
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