Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-30 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 SAIJ40BX900-30
The AirTAC SAIJ40X900-30 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 900 mm stroke that can be fine-tuned backward by up to 30 mm, yielding an effective 870-900 mm travel window. Delivering 879 N of push force at 0.7 MPa, it features a SUS304 stainless steel rod and PT tapered port threads.
This adjustable stopper lets you dial in exact end positions during commissioning without swapping the cylinder or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-30 |
|---|---|
| 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 SAIJ40BX900-30
| 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 SAIJ40BX900-30 Is Used
Machine Changeover
Quickly reconfigure the 870-900 mm travel end-stop during product size changes on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the exact retraction point during initial commissioning to perfect a 900 mm stroke sequence without adding external mechanical stops.
Material Handling
Drive long-stroke sorting pushes where the 30 mm adjustment screw compensates for minor variations in conveyor alignment or fixture heights.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-30 the Right Cylinder?
Choose this 40 mm bore when an application requires 879 N push force at 0.7 MPa but the exact end-of-travel position needs on-site tuning within an 870-900 mm window. If your setup demands less force, stepping down to a 32 mm bore yields 563 N; if you need significantly more thrust, a 63 mm bore provides 2182 N. Because the stroke is 900 mm, an external guide is highly recommended to prevent excessive side-loading on the rod.
This model uses a SUS304 stainless steel rod for superior corrosion resistance and PT tapered port threads. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. For load-holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder instead, as this rear adjuster is not a locking mechanism.
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 SAIJ40BX900-30 FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It can reach a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective travel by up to 30 mm, creating a usable stroke window of 870 to 900 mm. It acts as a mechanical stop to fine-tune the end position and is not a lock to hold the load without air pressure.
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