Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100S
The AirTAC SAIJ125X225-100-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa, making it suited for heavy-duty positioning tasks.
This specific SKU provides a usable travel window of 125 to 225 mm, allowing you to dial back the nominal 225 mm stroke by up to 100 mm during machine setup. It includes a magnet for position sensing and uses a SUS420J2 stainless steel rod for enhanced durability.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAIJ125AX225-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SAIJ125AX225-100S Is Used
Variable End-Stop Tuning
Dial in the exact retract distance from 125 to 225 mm during commissioning to accommodate multiple product sizes on a single line.
Heavy-Duty Positioning
Leverage the 6136N push force at 0.5 MPa to move heavy platens or fixtures into precise mechanical stops without requiring external shock absorbers.
Machine Changeover Setup
Quickly reconfigure the stroke length on product changeovers by turning the rear adjuster screw, reducing downtime versus physically replacing a fixed cylinder.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100S the Right Cylinder?
Choose this 125 mm bore when 80 mm (2513N push at 0.5 MPa) is insufficient but 160 mm (10053N) would be excessive. The 100 mm adjustment range is ideal for product changeovers, letting you fine-tune the retract end position without swapping hardware. The rear adjuster acts solely as a travel stop and does not hold the load without live air; for fail-safe load holding, select SAIL or BSAI. To match this ISO 15552 cylinder, specify bore 125, stroke 225, 100 mm adjust, PT ports, and the -S magnet. Since the stroke is under 300 mm, side-load risks are minimal, but long unsupported loads still need an external guide.
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 SAIJ125AX225-100S FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke by up to 100 mm. This creates a usable travel window of 125 to 225 mm, allowing precise end-position tuning without changing the cylinder.
At 0.5 MPa operating pressure, it provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
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