Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 190mm 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
- Stroke190 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-75S
The AirTAC SAIJ40X190-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 879N of push force at 0.7 MPa and features a 115-190mm usable travel window, allowing you to dial back the nominal 190mm stroke by up to 75mm during commissioning. The barrel is extruded aluminum with sensor grooves on both sides.
This specific SKU is built with a SUS304 stainless steel rod (option B) for superior corrosion resistance and includes a magnet (-S) for position detection. It is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state sensors. The PT tapered port threads are G1/4, and the rear adjuster acts purely as a mechanical stop to fine-tune end positions without adding external stops.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 190 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 SAIJ40BX190-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×190 | 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 SAIJ40BX190-75S Is Used
Machine Changeover
Dial in the 115-190mm travel window during product size changes to set new end positions without replacing the cylinder.
Variable End Stops
Use the 75mm rear screw to fine-tune the retract position precisely at commissioning instead of adding external stoppers.
Corrosive Testing
The SUS304 stainless steel rod withstands moisture and mild chemicals in test fixtures while providing reliable position feedback.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-75S the Right Cylinder?
Choose this 40mm bore when an application requires precise variable end-stops and moderate force, stepping up from a 32mm bore that provides 563N at 0.7 MPa. The 75mm adjustment range is ideal for product changeovers on a line, letting you reposition the end-of-stroke mechanically without swapping the cylinder. For an exact ISO 15552 replacement, match the 40mm bore, 190mm stroke, 75mm adjustment, PT G1/4 port, and the -S magnet.
Remember that the rear adjuster is a travel stop, not a lock; it cannot hold a load without live air pressure. For load-holding without continuous air, consider the SAIL or BSAI series. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR styles.
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 SAIJ40BX190-75S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke from 190mm down to 115mm. It sets the travel end but does not lock or hold the load without live air pressure.
At 0.7 MPa, the SAIJ40X190-75-S provides 879N of push force and 724N of pull force. It operates at speeds of 30-800mm/s.
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