Airtac SAIJ100 Adjustable Cylinder SAIJ100BX350-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX350-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 350mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX350-20S
The AirTAC SAIJ100X350-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 3927 N push force at 0.5 MPa and features a 25 mm SUS304 stainless steel rod. The built-in rear stopper allows you to fine-tune the effective travel window from 330 to 350 mm, making it ideal for dialing in exact end positions during machine commissioning without swapping hardware.
This model includes a magnet for position sensing and uses a G1/2 PT port. The extruded aluminum barrel incorporates sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. It carries adjustable air cushions at both ends to manage kinetic energy, but note that the rear adjuster acts only as a travel stop, not a load-holding lock.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX350-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX350-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 350 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100BX350-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | 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 SAIJ100 Adjustable Cylinder SAIJ100BX350-20S Is Used
Machine Changeover Setup
Dial in the 330-350 mm end position during format or product size changes on a packaging line, using the rear adjuster to hit exact stroke lengths without changing the cylinder.
Heavy Press Positioning
Leverage the 3927 N push force at 0.5 MPa to actuate heavy forming presses, relying on the fine-tuned stopper to prevent over-travel on delicate tooling.
Variable End-Stop Diverting
Actuate diverter gates on material handling conveyors where the exact extended position needs occasional field adjustment to accommodate different package dimensions.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX350-20S the Right Cylinder?
Choose this 100 mm bore when the 80 mm class (2513 N push at 0.5 MPa) is insufficient for your actuation needs, but the 125 mm bore (6136 N) would be physically oversized. The adjustable 330-350 mm travel window is specified here to allow on-the-fly end-position tuning during product changeovers, avoiding the need to bolt on external stops or replace a fixed-stroke SAI cylinder.
Because this cylinder features a 350 mm stroke, the extended 25 mm SUS304 rod will experience greater leverage under side loads; an external guide mechanism is recommended to prevent premature seal wear. If your application requires the load to be held in place without continuous live air pressure, this cylinder is not suitable—consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock, or an external pilot-operated check valve instead. It is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ100 Adjustable Cylinder SAIJ100BX350-20S FAQ
At a 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.7 MPa, the push force increases to 5497 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 350 mm nominal stroke by up to 20 mm, creating a usable travel window of 330 to 350 mm. It only sets the end position; it does not lock the load without live air pressure.
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