Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100S
The AirTAC SAIJ125X125-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a substantial 6136N push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides, and this specific configuration features a SUS420J2 stainless steel rod and a PT tapered port thread.
With a nominal stroke of 125 mm and a 100 mm adjustment range, the usable travel window can be dialed back anywhere from 25 to 125 mm. This broad adjustment span allows operators to fine-tune the retract end position during commissioning or product changeovers without physically swapping out the cylinder or adding bulky external stops. The integrated magnet supports CMSE reed and DMSE electronic sensors for precise position feedback.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAIJ125AX125-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SAIJ125AX125-100S Is Used
Variable End-Stop Positioning
Dial in the exact retract distance from 25 to 125 mm on heavy jigs where the final position shifts based on the specific product variant being assembled.
Machine Changeover Setup
Quickly reconfigure the stroke length during production line changeovers without disassembling the cylinder mounting or adding external spacers.
Heavy Clamping Force Tuning
Leverage the 6136N thrust at 0.5 MPa while adjusting the clamping travel window to accommodate varying material thicknesses safely.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100S the Right Cylinder?
Choose this 125 mm bore cylinder when an application requires high force combined with variable end-stops. If 6136N of push force at 0.5 MPa is excessive, stepping down to an 80 mm bore yields 2513N; conversely, moving up to a 160 mm bore provides 10053N. The rear adjuster screw acts purely as a mechanical travel stop to decelerate the piston, meaning it cannot hold a load without live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series instead.
This SAIJ variant is dimensionally interchangeable per ISO 15552 standards and operates at speeds between 30-500 mm/s. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the nominal stroke of 125 mm is below the 300 mm threshold, side-load stress is minimal, though the robust 32 mm rod and M27x2 thread naturally handle high mechanical loads.
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 SAIJ125AX125-100S FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster allows you to mechanically shorten the effective stroke by up to 100 mm. For this 125 mm nominal stroke model, the usable travel window can be fine-tuned anywhere between 25 mm and 125 mm without changing the cylinder's physical mounting.
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