Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-10S 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 SAIJ40BX900-10S
The AirTAC SAIJ40X900-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 879N of pull force at 0.7 MPa and features a 900mm nominal stroke that can be fine-tuned backward by up to 10mm, creating an exact 890-900mm usable travel window for precision end-position tuning.
This variant includes a SUS304 stainless steel rod for superior corrosion resistance and an integrated magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. Because the 900mm stroke is unsupported over a long distance, an external guide mechanism is required to handle side loads and prevent rod binding.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-10S |
|---|---|
| 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 SAIJ40BX900-10S
| 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 SAIJ40BX900-10S Is Used
Precision Component Seating
Dial in the exact 890-900mm travel window during machine commissioning to perfectly seat delicate components without adding external mechanical stops.
Product Changeover Diverter
Quickly adjust the end-of-stroke position by up to 10mm on a conveyor line to accommodate slight length variations in new product runs.
Corrosive Environment Actuation
Leverage the SUS304 stainless steel rod and adjustable stroke for reliable, fine-tuned actuation in washdown or mildly corrosive manufacturing settings.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-10S the Right Cylinder?
Choose this 40mm bore when an application requires moderate force (628N push at 0.5 MPa) but demands exact end-position calibration at commissioning or during product changeovers, avoiding the need to swap out a fixed-stroke SAI cylinder. If your setup requires higher clamping power, stepping up to the 50mm bore yields 982N push at 0.5 MPa.
To match this exact configuration for an ISO 15552 replacement, specify a 40mm bore, 900mm stroke, 10mm adjustment range, PT tapered port threads, SUS304 (B) rod material, and the -S magnet option. Remember that the rear adjuster functions strictly as a travel stop and does not hold the load without live air; for dead-air load holding, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ40BX900-10S FAQ
At 0.5 MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 900mm nominal stroke by up to 10mm. This creates a usable travel window of 890-900mm for fine-tuning the retract end position without changing the cylinder.
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