Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-40S
The AirTAC SAIJ40X225-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 185 to 225 mm, allowing you to dial in the exact retract end-position during commissioning without swapping hardware. At 0.5 MPa, it delivers 628 N of push force and 528 N of pull force, operating smoothly at speeds between 30 and 800 mm/s.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads with a G1/4 connection. The extruded aluminum barrel includes sensor grooves on both sides, and because this unit includes a magnet (-S), it supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise position feedback. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 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 SAIJ40BX225-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 SAIJ40BX225-40S Is Used
Product Changeovers
Dial in the 185-225 mm travel window during format size changes on a packaging line without physically replacing the cylinder or adding external stopper blocks.
Commissioning Fine-Tuning
Perfectly set the retract end-position during machine setup to avoid mechanical crashes, using the rear screw to absorb minor positional deviations.
Corrosive Assembly Tasks
Leverage the SUS304 stainless steel rod for light assembly duties in environments requiring high corrosion resistance and repeatable adjustable end-stops.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-40S the Right Cylinder?
Choose this 40 mm bore when an application requires moderate force, or step up to the 50 mm bore (982 N push at 0.5 MPa) for heavier loads. The adjustable stroke is ideal for product changeovers on a line, letting you shift the end-stop by up to 40 mm on the fly instead of installing a fixed SAI cylinder. For exact ISO 15552 replacement matching, verify the 225 mm stroke, 40 mm adjustment, PT port, and the required -S magnet.
Because the nominal stroke is 225 mm, ensure adequate guidance to prevent rod side-loading. Remember that the rear adjuster acts only as a travel stop, not a lock; the SAIJ40X225-40-S cannot hold a load without live air. For dead-end load holding, consider an external pilot-operated check valve or the AirTAC SAIL lock cylinder 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 SAIJ40BX225-40S FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 40 mm. This creates a usable travel window of 185 to 225 mm, allowing you to fine-tune the retract end-position at commissioning without changing the cylinder.
At 0.5 MPa operating pressure, the SAIJ40X225-40-S generates 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.