Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-30S 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 SAIJ40BX230-30S
The AirTAC SAIJ40X230-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a 200-230mm usable travel window, allowing you to trim the effective stroke by up to 30mm during commissioning. This built-in adjustability eliminates the need to swap cylinders or bolt on external stops when fine-tuning end positions.
Configured with a SUS304 stainless steel rod and a PT tapered port thread, this 40mm bore model integrates seamlessly with existing pneumatic setups. The extruded aluminum barrel includes sensor grooves on both sides, and the included magnet (-S) supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise position detection.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-30S |
|---|---|
| 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 SAIJ40BX230-30S
| 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 SAIJ40BX230-30S Is Used
Machine Changeovers
Dial in the 200-230mm travel window during product size changes without physically swapping out the entire cylinder or adding shims.
End-Stop Calibration
Use the rear adjuster to fine-tune the retract end position during initial commissioning, ensuring precise mechanical alignment.
Variable Positioning
Ideal for diverter gates or pushers that occasionally require a slightly shortened stroke to accommodate different package sizes.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-30S the Right Cylinder?
Choose this 40mm bore cylinder when an application requires precise end-position tuning within a 200-230mm travel window, stepping up from a 32mm bore (402N push at 0.5 MPa) if you need greater thrust, or down from a 50mm bore (982N push) to save space. The adjustable stroke is ideal for product changeovers on a line, offering more flexibility than a fixed-stroke SAI cylinder. When specifying an ISO 15552 replacement, match the 40mm bore, 230mm nominal stroke, 30mm adjustment, G1/4 port, PT thread, and -S magnet.
Because the nominal stroke is 230mm, ensure adequate support to prevent rod sag and side-load wear. Remember that the rear adjuster acts only as a travel stop, not a lock; the cylinder cannot hold a load without live air. For load-holding requirements without continuous pressure, consider an AirTAC SAIL or BSAI cylinder. SAIJ mounting options include 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 SAIJ40BX230-30S FAQ
The rear adjuster allows you to shorten the effective stroke by up to 30mm, creating a 200-230mm usable travel window. It acts as a mechanical stop to fine-tune the end position without changing the cylinder.
At 0.5 MPa operating pressure, it provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
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