Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 90mm 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
- Stroke90 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-75
The AirTAC SAIJ40X90-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 90 mm stroke that can be dialed back by up to 75 mm, yielding a highly flexible 15 to 90 mm usable travel window. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod and PT tapered ports.
This adjustable design allows precise end-position tuning during commissioning without swapping out the cylinder or adding external stops. The rear adjuster acts purely as a travel stop for deceleration alongside the standard air cushions, meaning it will not hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 90 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 SAIJ40BX90-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×90 | 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 SAIJ40BX90-75 Is Used
Variable Retract Stops
Dial in the exact end-of-stroke position for varying part sizes on a single fixture without physically replacing the actuator.
Machine Changeover
Quickly adjust the 15-90 mm travel window during product line transitions to accommodate different component heights.
Commissioning Fine-Tune
Trim the nominal 90 mm stroke during initial setup to perfectly time machine sequencing without adding external shims.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-75 the Right Cylinder?
Select this model when an application requires frequent product changeovers that alter the retract end-stop. Instead of machining custom spacers for a fixed SAI cylinder, the SAIJ40X90-75 lets operators dial in the exact 15-90 mm travel window on the fly. If your setup needs less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa, while moving up to a 50 mm bore provides 982 N.
Because the 90 mm stroke is relatively short, side-loading stress on the 16 mm rod and M12x1.25 thread is minimized, though an external guide is always recommended for lateral loads. This cylinder uses the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. It is dimensionally interchangeable with ISO 15552 cylinders.
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 SAIJ40BX90-75 FAQ
At an operating pressure of 0.5 MPa, the SAIJ40X90-75 delivers 628 N of push force and 528 N of pull force. At the maximum pressure of 1.0 MPa, it can generate up to 128 kgf.
The rear adjuster screw allows you to shorten the effective travel from the nominal 90 mm down to as little as 15 mm. This provides a 15-90 mm adjustable window, acting as a mechanical stop to set the exact end position without needing a different cylinder.
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