Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75S
The AirTAC SAIJ40X475-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628 Newtons of push force at 0.5 MPa and features a 475 mm nominal stroke that can be fine-tuned backward by up to 75 mm, yielding a precise 400-475 mm usable travel window. This built-in adjustability allows operators to dial in exact retract end positions during commissioning without adding external stopper blocks.
Configured with a SUS304 stainless steel rod (code B) and PT tapered ports, this model is tailored for environments requiring superior corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet (-S) directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for accurate position feedback. It utilizes variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 475 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 SAIJ40BX475-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×475 | 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 SAIJ40BX475-75S Is Used
Product Changeovers
Quickly modify the retract distance within the 400-475 mm window to accommodate varying package sizes on a packaging line without changing hardware.
Machine Setup Tuning
Fine-tune the exact end-of-stroke position during initial commissioning to perfectly align tooling, avoiding the need for machined spacer shims.
Variable Diverting
Adjust the stroke length on a conveyor sorting arm to push different product widths into specific lanes on the fly.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75S the Right Cylinder?
Choose this 40 mm bore when an application demands the 628 N push force at 0.5 MPa, stepping up from a 32 mm bore (402 N) if extra thrust is needed, or dropping down from a 50 mm bore (982 N) to save space and air consumption. An adjustable-stroke SAIJ is preferred over a fixed SAI when a machine handles frequent product changeovers, as the 75 mm rear screw allows rapid end-position tuning without swapping the cylinder. Note that the rear adjuster functions strictly as a travel stop and does not hold the load without live air; for true pneumatic locking without pressure, consider an AirTAC SAIL or BSAI cylinder.
Because the 475 mm stroke is relatively long, the 16 mm rod should be paired with an external guide to prevent excessive side-loading and premature seal wear. For a direct ISO 15552 dimensional replacement, match the 40 mm bore, 475 mm stroke, -75 adjustment, PT ports, SUS304 rod, and -S magnet. The compatible mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR configurations.
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 SAIJ40BX475-75S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 Newtons of push force and 528 Newtons of pull force. At 0.7 MPa, the push force increases to 879 Newtons.
The rear adjuster screw allows you to shorten the 475 mm nominal stroke by up to 75 mm, creating a usable travel window of 400 to 475 mm. This stopper only sets the end position and does not lock the load without continuous air pressure.
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