Airtac Adjustable Cylinder SAIJ32 SAIJ32AX475-20S
The AirTAC Airtac Adjustable Cylinder SAIJ32 SAIJ32AX475-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø32mm bore and 475mm stroke, G1/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ32 mm
- Stroke475 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable, 27 mm
About the Airtac Adjustable Cylinder SAIJ32 SAIJ32AX475-20S
The AirTAC SAIJ32X475-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 475 mm stroke by up to 20 mm. This yields a precise 455-475 mm usable travel window, ideal for fine-tuning end positions during commissioning or product changeovers without swapping the barrel or bolting on external stops. The bore delivers 402 N of pull force at 0.5 MPa and 724 N of push force at 0.9 MPa.
This variant features an SUS420J2 stainless steel rod (option A) for enhanced durability against moisture and light corrosion. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet enables position detection using AirTAC CMSE reed or DMSE electronic solid-state switches. The rear adjuster acts strictly as a travel stop and works alongside the adjustable air cushions at both ends to decelerate the load, but it does not hold the load without live air pressure.
Airtac Adjustable Cylinder SAIJ32 SAIJ32AX475-20S Technical Specifications
| Model | Airtac Adjustable Cylinder SAIJ32 SAIJ32AX475-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø32 mm |
| Stroke | 475 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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, 27 mm |
| Max stroke | Up to 1000 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac Adjustable Cylinder SAIJ32 SAIJ32AX475-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 32 | 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 Adjustable Cylinder SAIJ32 SAIJ32AX475-20S Is Used
Machine Changeover
Dial in the 455-475 mm end-stop precisely when switching product sizes on a packaging line, avoiding the need to machine custom spacers.
Assembly Press
Fine-tune the retraction depth during commissioning to ensure consistent pressing force, using the rear stopper to set the exact travel limit.
Diverting Gate
Adjust the actuator travel window on-site to perfectly position a sorting gate without replacing the entire cylinder assembly.
Is the Airtac Adjustable Cylinder SAIJ32 SAIJ32AX475-20S the Right Cylinder?
Choose this 32 mm bore when your application requires a 455-475 mm stroke range and moderate thrust; if you need higher force, stepping up to the 40 mm bore yields 528 N of pull force at 0.5 MPa. Because the 475 mm stroke is long relative to the 12 mm rod diameter, the cylinder is susceptible to side-loading deflection, so an external guide mechanism is required to support the load and prevent premature seal wear. An adjustable stroke is preferred over a fixed SAI cylinder here because the rear stopper screw allows rapid end-position tuning during machine setup without changing the ISO 15552 mounting footprint.
When matching this cylinder for an ISO 15552 replacement, verify the 32 mm bore, 475 mm nominal stroke, 20 mm adjustment range, PT tapered port threads, and the -S magnet option. Note that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets found on some other series. If your machine requires the load to be held mechanically in place without live air, the rear adjuster will not function as a lock; you should instead select an AirTAC SAIL (pneumatic lock) or BSAI (clamp-lock) cylinder.
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 Adjustable Cylinder SAIJ32 SAIJ32AX475-20S FAQ
The rear of the cylinder features an external stopper screw that lets you shorten the effective stroke by up to 20 mm. This provides a usable travel window of 455-475 mm, allowing you to fine-tune the retraction end position at commissioning without altering the ISO 15552 mounting dimensions.
At a 0.5 MPa operating pressure, it provides 402 N of pull force and 345 N of push force. At 0.9 MPa, the push force increases to 724 N. Note that the rear adjuster and air cushions only decelerate the load; they do not hold it in place without continuous live air pressure.
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