Airtac Adjustable Cylinder SAIJ32 SAIJ32BX400-20S
The AirTAC Airtac Adjustable Cylinder SAIJ32 SAIJ32BX400-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø32mm bore and 400mm 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
- Stroke400 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable, 27 mm
About the Airtac Adjustable Cylinder SAIJ32 SAIJ32BX400-20S
The AirTAC SAIJ32X400-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a SUS304 stainless steel rod and a built-in magnet for CMSE and DMSE sensors. With a nominal 400 mm stroke and a 20 mm adjustment range, it provides a usable travel window of 380-400 mm, allowing you to dial in the exact retract position during commissioning without adding external stops. The G1/8 PT port delivers 402N of push force at 0.5 MPa.
Because the 400 mm stroke is relatively long for a 32 mm bore, the 12 mm rod and M10x1.25 thread should be paired with an external guide to handle potential side loads. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2 options. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac Adjustable Cylinder SAIJ32 SAIJ32BX400-20S Technical Specifications
| Model | Airtac Adjustable Cylinder SAIJ32 SAIJ32BX400-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø32 mm |
| Stroke | 400 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 SAIJ32BX400-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×400 | 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 SAIJ32BX400-20S Is Used
Machine Changeover
Fine-tune the 380-400 mm retract position during product size changes without physically swapping the cylinder or adding external stopper blocks.
End-Position Calibration
Dial in the exact end-of-stroke location at commissioning to compensate for mechanical tolerance variations across the fixture.
Variable Stops
Provide an adjustable physical stop for indexing applications where the retract distance needs occasional adjustment.
Is the Airtac Adjustable Cylinder SAIJ32 SAIJ32BX400-20S the Right Cylinder?
Choose this 32 mm bore cylinder when you need precise end-position tuning on a 400 mm stroke, offering 402N push force at 0.5 MPa. If your application requires higher thrust, stepping up to the 40 mm bore yields 628N. The adjustable 380-400 mm window is perfect for machine setups requiring variable end stops or product changeovers, avoiding the need to swap a fixed-stroke SAI cylinder. For load-holding without continuous air pressure, consider the SAIL or BSAI series, as the SAIJ adjuster is not a lock.
When replacing an ISO 15552 cylinder, match the 32 mm bore, 400 mm stroke, 20 mm adjustment, G1/8 PT port, and the -S magnet requirement. Given the 400 mm stroke, ensure your mounting configuration (Basic, FA, LB, TC, FTC, TCM1, or TCM2) includes an external guide to manage side loads on the 12 mm rod.
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 SAIJ32BX400-20S FAQ
The rear adjuster allows you to shorten the effective stroke by up to 20 mm, creating a usable travel window of 380-400 mm. It acts as a mechanical stop to fine-tune the end position and is not a lock.
At 0.5 MPa operating pressure, the SAIJ32X400-20-S provides 402N of push force and 345N of pull force. It can reach up to 724N push force at 0.9 MPa.
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