Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-100
The AirTAC SAIJ40X230-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to dial back the nominal 230 mm travel by up to 100 mm, creating a precise 130 to 230 mm usable positioning window. It delivers a robust 879 N push force at 0.7 MPa, making it well-suited for moderate-load automation tasks.
This variant is configured with a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads for a reliable sealing connection. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting, while the rear stopper mechanism allows for exact end-position tuning at commissioning without the need to swap out the entire cylinder.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 230 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 SAIJ40BX230-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×230 | 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 SAIJ40BX230-100 Is Used
Machine Changeover
Fine-tune the retract end-position across a 130-230 mm window during product size transitions without adding external mechanical stops.
End-Position Calibration
Dial in the exact stroke length at commissioning to compensate for mechanical wear or sensor drift on the assembly line.
Variable Stroke Sequencing
Set distinct stroke lengths for different operational phases within the same cycle, relying on the rear screw to set the hard stop.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-100 the Right Cylinder?
Choose this 40 mm bore adjustable-stroke cylinder when your machine setup requires variable end-stops or frequent product changeovers, stepping up from a 32 mm bore (which provides 563 N push force at 0.7 MPa) to handle heavier actuation demands. The 16 mm diameter rod and M12x1.25 rod thread offer strong resistance to side-loading, though for any application utilizing the full 230 mm stroke, an external guide is recommended to prevent rod binding.
When specifying an ISO 15552 replacement, verify the 40 mm bore, 230 mm stroke, 100 mm adjustment range, PT port threads, and the required mounting style. Note that SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. Because the rear adjuster acts solely as a travel stop and the air cushions only manage deceleration, this cylinder cannot hold a load without live air pressure; for true load-holding, consider the SAIL or BSAI series.
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 SAIJ40BX230-100 FAQ
At a 0.7 MPa operating pressure, this 40 mm bore cylinder generates 879 N of push force and 528 N of pull force. It can achieve a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster screw acts as an external stopper that can shorten the effective travel by up to 100 mm. For this 230 mm nominal stroke model, this creates an adjustable usable travel window ranging from 130 to 230 mm.
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