Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-100S
The AirTAC SAIJ125X900-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5MPa and features a 900mm nominal stroke that can be fine-tuned down by up to 100mm, providing an exact 800-900mm usable travel window during commissioning.
This unit includes a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and is built with a -S magnet for position sensing. Operating at 30-500mm/s, it utilizes a PT G1/2 port and integrates variable air cushions at both ends to decelerate heavy loads smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 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 SAIJ125AX900-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×900 | 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 SAIJ125AX900-100S Is Used
Product Size Changeovers
Dial in the 800-900mm travel window on the fly to accommodate different product lengths on the same conveyor line without changing the cylinder.
Long-Stroke Positioning
Fine-tune the exact end-stop for heavy 6136N push applications, ensuring precise placement without relying on hard external stops.
Machine Setup & Commissioning
Use the 100mm rear adjustment screw to trim the stroke perfectly into position during initial machine build, compensating for mechanical tolerances.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-100S the Right Cylinder?
Choose this 125mm bore when a 100mm bore provides insufficient thrust (offering 3927N push at 0.5MPa) but a 160mm bore is excessive (delivering 10053N). The adjustable 800-900mm travel window is ideal for product changeovers on long-stroke lines, allowing you to set precise end positions without swapping cylinders or adding external stops.
Because the 900mm stroke is long and unsupported, an external guide is required to prevent excessive side-loading on the 32mm rod. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for dead-air load holding, consider an AirTAC SAIL or BSAI cylinder. This SKU is dimensionally interchangeable per ISO 15552 and uses the SAIJ mounting subset: Basic, FA, LB, TC, FTC, TCM1, 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 SAIJ125 Adjustable Cylinder SAIJ125AX900-100S FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At its maximum 1.0MPa pressure, it can deliver up to 1251kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 100mm, creating an 800-900mm usable travel window. It acts as a mechanical stop to set the end position and does not lock the load without live air pressure.
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