Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-75S
The AirTAC SAIJ40X350-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 275-350mm, allowing you to dial back the 350mm nominal stroke by up to 75mm during commissioning. It delivers 628N of pull force at 0.5MPa and uses a PT tapered port thread.
This SKU features a SUS304 stainless steel rod for corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel incorporates sensor grooves on both sides. The rear adjuster acts as a travel stop to fine-tune end positions without adding external stops.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 SAIJ40BX350-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 SAIJ40BX350-75S Is Used
Product Changeover Lines
Dial in the 275-350mm travel window during format size changes without physically swapping the cylinder.
End-Position Tuning
Fine-tune the retract end-position at commissioning using the rear stopper to avoid adding external mechanical stops.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable actuation in washdown or mildly corrosive industrial settings.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-75S the Right Cylinder?
Choose this adjustable-stroke model over a fixed SAI when your machine setup requires variable end-stops or product-size changeovers. If your application needs less force, stepping down to a 32mm bore yields 345N of pull force at 0.5MPa. The 350mm stroke on this 16mm rod requires an external guide to prevent excessive side-loading and premature seal wear.
For ISO 15552 replacement matching, specify bore 40, stroke 350, 75mm adjustment, PT port thread, and the -S magnet. The rear screw stopper and air cushions only set travel ends; they do not hold the load without live air. For fail-safe load holding, consider the SAIL pneumatic lock or BSAI clamp-lock series.
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 SAIJ40BX350-75S FAQ
At 0.5MPa it provides 628N push and 528N pull force, operating at a speed range of 30-800mm/s. The 16mm rod and M12x1.25 thread handle standard operational loads.
The rear adjuster lets you shorten the 350mm nominal stroke by up to 75mm, creating a 275-350mm usable travel window. It acts as a physical stop, so it does not lock the load without continuous air pressure.
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