Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20S
The AirTAC Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø32mm bore and 40mm 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
- Stroke40 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable, 27 mm
About the Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20S
The AirTAC SAIJ32X40-20-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 40mm stroke that can be dialed back by up to 20mm, yielding a highly versatile 20-40mm usable travel window for precision end-position tuning. Delivering 402N of push force at 0.5MPa, it integrates a SUS304 stainless steel rod for superior corrosion resistance and pairs with PT tapered port threads.
This adjustable-stroke design eliminates the need to swap cylinders or bolt on external stops during machine commissioning or product changeovers. The extruded aluminum barrel includes sensor grooves on both sides, and because this variant includes a magnet (-S), it directly supports AirTAC CMSE reed and DMSE electronic solid-state switches. Note that the rear adjuster acts only as a travel stop, not a load-holding lock.
Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20S Technical Specifications
| Model | Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø32 mm |
| Stroke | 40 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 SAIJ32BX40-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×40 | 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 SAIJ32BX40-20S Is Used
End-Position Calibration
Dial in the exact retract stop during machine commissioning without swapping hardware.
Product Changeover
Quickly adjust the 20-40mm travel window on a packaging line to handle different component sizes.
Variable End Stops
Use the rear stopper screw to fine-tune the final position on light-duty assembly presses.
Is the Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20S the Right Cylinder?
Select this 32mm bore cylinder when an application requires 402N of push force at 0.5MPa with exact end-positioning flexibility. The 20mm adjustment range allows you to trim the 40mm stroke down to 20mm, making it ideal for setups requiring variable end stops. If your setup needs less force, stepping down is not an option below 32mm in this series, but if you require significantly higher thrust, a 40mm bore provides 628N. For load-holding without live air pressure, this plain SAIJ cylinder will not suffice; consider an AirTAC SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 32mm bore, 40mm stroke, 20mm adjustment, PT G1/8 port, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. With a 12mm rod and M10x1.25 thread, it handles moderate side loads, though any long unsupported stroke still requires an external guide.
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 SAIJ32BX40-20S FAQ
It features a rear adjuster screw that lets you shorten the 40mm nominal stroke by up to 20mm, creating a 20-40mm usable travel window. The adjuster acts as a mechanical stop and does not lock the load without live air.
At 0.5MPa operating pressure, it provides 402N of push force and 345N of pull force. The maximum thrust is 82kgf at 1.0MPa.
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Covers non-human-caused product damage.
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