Airtac SAIJ100 Adjustable Cylinder SAIJ100BX375-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX375-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 375mm 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
- Stroke375 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX375-20S
The AirTAC SAIJ100X375-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window to 355-375 mm without adding external stops. It delivers a robust 5497 N push force at 0.7 MPa, making it well-suited for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides to support position feedback.
This configuration uses a SUS304 stainless steel rod (option B) for superior corrosion resistance and features PT tapered port threads (G1/2). The rear adjuster acts purely as a mechanical stop to set the retraction end position; it does not lock or hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX375-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX375-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 375 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 SAIJ100BX375-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×375 | 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 SAIJ100BX375-20S Is Used
Machine Setup & Changeover
Fine-tune the 355-375 mm retraction end-stop during product line changeovers without swapping out the entire cylinder or adding external shims.
Heavy Material Pushing
Leverage the 5497 N push force at 0.7 MPa to move heavy pallets or workpieces, relying on the SUS304 rod for durability in harsh environments.
Variable End-Stop Diverter
Adjust the stroke length on the fly to accommodate different package sizes on a conveyor line, using the PT threaded ports for secure pneumatic connections.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX375-20S the Right Cylinder?
Choose this 100 mm bore when a 63 mm bore (2182 N push at 0.5 MPa) is insufficient for your load, but a 125 mm bore (6136 N push at 0.5 MPa) would be excessive. The 20 mm adjustment range is ideal for product changeovers, allowing you to dial in the exact end position at commissioning rather than machining custom spacers. The -S magnet enables precise end-of-stroke detection using AirTAC CMSE reed or DMSE electronic solid-state sensors.
When replacing an ISO 15552 cylinder, match the 100 mm bore, 375 mm stroke, 20 mm adjustment, PT port thread, and mounting style. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, intentionally omitting FB, CA, CB, and CR. Because the stroke is 375 mm, the M20x1.5 rod and standard bearing can experience amplified side loads; always use an external guide rail to prevent premature wear.
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 SAIJ100BX375-20S FAQ
At 0.7 MPa operating pressure, this 100 mm bore cylinder provides a push force of 5497 N and a pull force of 3681 N. It can achieve a maximum push force of 7068 N at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 20 mm, creating a usable travel window of 355 to 375 mm. This mechanical stop only sets the end position and decelerates the load; it does not function as a lock or brake to hold the load without live air.
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