Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-100S 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 SAIJ40BX350-100S
The AirTAC SAIJ40X350-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 350 mm stroke that can be dialed back by up to 100 mm, creating a precise 250-350 mm usable travel window for highly flexible machine setups. Delivering 628 N of push force at 0.5 MPa, it utilizes a PT tapered port thread and a G1/4 air connection.
This specific configuration features a SUS304 stainless steel rod (code B) for superior corrosion resistance and includes a built-in magnet for position sensing. You can mount CMSE reed or DMSE electronic solid-state switches in the dual-side sensor grooves of the extruded aluminum barrel. The rear adjuster acts purely as a travel stop to fine-tune the end position, meaning it does not lock or hold the load without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-100S |
|---|---|
| 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 SAIJ40BX350-100S
| 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 SAIJ40BX350-100S Is Used
Product Size Changeover
Dial in the 250-350 mm travel window during format changes on packaging lines, using the rear stopper to instantly adapt to different carton depths without changing hardware.
Machine Setup Tuning
Fine-tune the end-of-stroke position during commissioning to achieve exact material contact, avoiding the need to machine custom spacer blocks or reposition heavy mounts.
Variable End-Stop Positioning
Accommodate multiple part lengths in a single machining fixture by adjusting the retract stop on the fly, relying on the SUS304 rod for durability in diverse environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-100S the Right Cylinder?
Choose this 40 mm bore when an application requires moderate force, such as 628 N push at 0.5 MPa, but demands extensive end-position flexibility; stepping down to a 32 mm bore drops the push force to 402 N, while a 50 mm bore increases it to 982 N. The 100 mm adjustment range is ideal for product-size changeovers on a line, allowing you to reposition the retract stop without swapping the cylinder or adding external stops. For load-holding without live air pressure, this cylinder is insufficient as the adjuster is not a brake; you should explore an AirTAC SAIL or BSAI series instead.
Because this model features a 350 mm stroke, the 16 mm rod diameter should be paired with an external guide to prevent excessive side-loading and premature seal wear. To match this exact ISO 15552 replacement, specify: 40 mm bore, 350 mm stroke, 100 mm adjustment, PT port thread, G1/4 connection, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting options, and the -S magnet option.
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 SAIJ40BX350-100S FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder generates a push force of 628 N and a pull force of 528 N. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the effective stroke by up to 100 mm from the 350 mm nominal length, providing a usable travel window of 250-350 mm. It functions as a mechanical stop to set the end position and does not lock the load.
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