Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-30 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 SAIJ40BX230-30
The AirTAC SAIJ40X230-30 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear mechanical stroke adjuster. It provides a 200 to 230 mm usable travel window by allowing you to dial back the nominal 230 mm stroke by up to 30 mm. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads.
This extruded aluminum profile cylinder includes variable air cushions at both ends to manage kinetic energy. The rear adjuster functions purely as an end-position stop for fine-tuning during commissioning or product changeovers; it does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-30 |
|---|---|
| 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 SAIJ40BX230-30
| 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 SAIJ40BX230-30 Is Used
Commissioning Fine-Tuning
Dial in the exact end-of-stroke position during machine commissioning without adding external stopper blocks or changing the cylinder.
Product Size Changeovers
Quickly adapt the travel distance between 200 and 230 mm on packaging lines when processing different product sizes.
Variable End Stops
Set precise retract positions for assembly processes that require flexibility in tooling reach and clamping depth.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-30 the Right Cylinder?
Choose this 40 mm bore when your application requires approximately 628 N of push thrust at 0.5 MPa. If your setup demands less force, stepping down to a 32 mm bore yields 402 N, while moving up to a 50 mm bore provides 982 N. The adjustable stroke is ideal for machinery requiring variable end-stops without physically swapping cylinders, offering a distinct advantage over fixed-stroke SAI models during machine setup and product size changeovers.
Because this is a non-locking profile cylinder, the rear stopper and air cushions only decelerate the travel end. To safely hold a load in place without continuous compressed air, integrate an external pilot-operated check valve or select an AirTAC SAIL pneumatic lock cylinder. For this 230 mm stroke, ensure external guiding is used if heavy side loads are anticipated. It supports a mounting set of Basic, FA, LB, TC, FTC, TCM1, and 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 SAIJ40BX230-30 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The rear mechanical adjuster acts as a stopper that shortens the effective travel. For this model, it creates a usable stroke window of 200 to 230 mm, allowing you to trim the retract position by up to 30 mm without replacing the cylinder.
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