Airtac SAIJ100 Adjustable Cylinder SAIJ100BX375-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX375-20 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 SAIJ100BX375-20
The AirTAC SAIJ100X375-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the travel by up to 20 mm, creating a usable 355-375 mm end-position window. It delivers a robust 3927 N push force at 0.5 MPa and 7068 N at 0.9 MPa, making it well-suited for heavy-duty positioning tasks. This specific configuration includes a SUS304 stainless steel piston rod for superior corrosion resistance and a PT tapered port thread.
Because the barrel is an extruded aluminum profile with sensor grooves on both sides, it is not a tie-rod design. The rear adjuster acts purely as a travel stop to fine-tune the retract position during commissioning; it does not lock or hold the load without live air pressure. For applications requiring position holding without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX375-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX375-20 |
|---|---|
| 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 SAIJ100BX375-20
| 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 SAIJ100BX375-20 Is Used
Machine Changeover
Dial in the 355-375 mm retract position during product size changes on a packaging line without swapping out the entire actuator.
Heavy Pressing
Leverage the 7068 N push force at 0.9 MPa for heavy assembly operations while using the rear stop to prevent over-travel.
Commissioning Calibration
Fine-tune the end-of-stroke position during initial machine commissioning to perfectly align tooling without machining custom spacers.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX375-20 the Right Cylinder?
Choose this 100 mm bore when a 80 mm bore (2513 N push at 0.5 MPa) is insufficient, but a 125 mm bore (6136 N) would be excessive overkill. The adjustable stroke is selected over a fixed-stroke SAI when you need to fine-tune the retract end-stop during machine setup or product changeover without adding external physical stops. When replacing an ISO 15552 cylinder, match the 100 mm bore, 375 mm stroke, 20 mm adjustment range, PT G1/2 port, and your required mounting accessory.
With a 375 mm stroke, the M20x1.5 rod thread and 25 mm rod diameter provide good rigidity, but long unsupported travels still require an external guide rail to prevent excessive side-loading and premature seal wear. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR configurations.
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 SAIJ100BX375-20 FAQ
At 0.5 MPa operating pressure, it provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N.
The rear adjuster screw lets you shorten the 375 mm nominal stroke by up to 20 mm, giving a usable travel window of 355 to 375 mm. It functions as a mechanical stop for end-position tuning and does not lock the load without live air.
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