Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 210mm 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.
- BoreØ125 mm
- Stroke210 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100S
The AirTAC SAIJ125X210-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a SUS420J2 stainless steel rod (option A) and a PT tapered port thread. By turning the rear stopper screw, you can trim the nominal 210mm stroke back by up to 100mm, creating a precise 110-210mm usable travel window for exact end-position tuning.
This wide adjustment range is ideal for product changeovers, letting you reset machine endpoints without swapping hardware or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, and the included magnet (-S) directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for versatile positioning feedback.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 210 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×210 | 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 SAIJ125 Adjustable Cylinder SAIJ125AX210-100S Is Used
Variable End-Stop Tuning
Dial in the retraction point anywhere from 110 to 210mm during machine commissioning to perfectly match new tooling heights without disassembling the cylinder.
Product Size Changeover
Quickly adapt a packaging or handling line to different carton sizes by rotating the rear adjuster screw to shift the endpoint, minimizing downtime between production runs.
Heavy Forming Setup
Leverage the 6136N thrust to drive heavy pressing or forming operations, using the wide 100mm adjustment band to fine-tune the working depth on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100S the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 2513N push force at 0.5 MPa) lacks the power to move your load, but a 160mm bore (delivering 10053N) would be excessive overkill. The 100mm adjustment window is highly valuable on flexible production lines, allowing you to dial in the exact retraction point during commissioning or product size changes instead of ordering custom fixed-stroke SAI units.
Because the nominal stroke is 210mm, the 32mm rod and M27x2 thread provide robust resistance to side loads, though any long unsupported travel still requires an external guide. Remember that the rear adjuster acts only as a travel stop and the air cushion handles deceleration; neither will hold the load safely without live air. For true load-holding without pneumatic pressure, specify an external rod lock, a pilot-operated check valve, or select the BSAI clamp-lock variant. This cylinder is dimensionally interchangeable per ISO 15552 and uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ125 Adjustable Cylinder SAIJ125AX210-100S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 8590N.
The rear stopper screw allows you to mechanically shorten the 210mm nominal stroke by up to 100mm, providing an effective usable travel window of 110-210mm. The adjuster acts as a physical stop to set the end position and does not lock the load without live air pressure.
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