Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 250mm 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
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-20S
The AirTAC SAIJ100X250-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 3927N of push force at 0.5 MPa and features a 250mm nominal stroke that can be fine-tuned down by up to 20mm, creating a precise 230-250mm usable travel window. This built-in adjustability allows you to dial in the exact retract end-position during commissioning without swapping out the cylinder.
This variant includes a magnet for position sensing and uses a carbon steel rod with an M20x1.5 thread. Because it is an extruded aluminum profile cylinder, it provides sensor grooves on both sides for easy switch mounting. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 250 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 SAIJ100X250-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×250 | 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 SAIJ100X250-20S Is Used
Product Changeover
Quickly dial in the 230-250mm travel window during production line format changes without replacing hardware.
End-Stop Calibration
Fine-tune the retract position during machine commissioning to achieve precise mechanical stopping points.
Heavy Assembly Pushing
Leverage the 3927N push force at 0.5 MPa to move and position heavy components along the assembly line.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-20S the Right Cylinder?
Choose this 100mm bore when an 80mm cylinder (providing 2513N push at 0.5 MPa) cannot generate enough force, but you want to avoid stepping up to a 125mm unit. The adjustable stroke is ideal for machine setups requiring variable end-stops or frequent product-size changeovers, saving the effort of adding external stops compared to a fixed SAI cylinder. For this 250mm stroke, ensure external guiding is used to prevent excessive side-loading on the M20x1.5 rod.
To match this ISO 15552 cylinder, verify a 100mm bore, 250mm stroke, 20mm adjustment, PT tapered ports, and the -S magnet option. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2. The -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors.
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 SAIJ100X250-20S FAQ
At 0.5 MPa, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. It can reach a maximum push force of 7068N at 0.9 MPa.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the 250mm nominal stroke by up to 20mm. This creates a 230-250mm travel window, though it does not lock or hold the load without continuous air pressure.
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