Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 1000mm 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
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-20
The AirTAC SAIJ125X1000-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 1000 mm stroke that can be fine-tuned down by up to 20 mm, giving you a precise 980-1000 mm usable travel window during commissioning. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads without needing external stops.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU omits the magnet, meaning CMSE or DMSE electronic switches cannot be used without modification.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 1000 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 SAIJ125AX1000-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | 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 SAIJ125AX1000-20 Is Used
Long-Stroke Forming
Dial in the exact 980-1000 mm end position for heavy pressing or forming tasks during initial machine setup.
Product Changeovers
Quickly adjust the rear stopper by up to 20 mm to accommodate different product lengths on an automated line.
Heavy Load Transfer
Utilize the 6136 N push force at 0.5 MPa to move substantial materials while fine-tuning the retract distance.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-20 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore falls short, offering 3927 N of push force at 0.5 MPa compared to the 6136 N provided here. The adjustable stroke is ideal for product changeovers on a line, letting you dial in the exact end-stop without swapping the cylinder. Because the rear adjuster acts only as a travel stop and the air cushions manage deceleration, neither will hold a load without live air; for true load-holding, consider the SAIL or BSAI series.
To replace an ISO 15552 cylinder, match the 125 mm bore, 1000 mm stroke, 20 mm adjustment, PT G1/2 port, and mounting choice (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Since the stroke is 1000 mm, an external guide is recommended to prevent excessive side-loading on the rod.
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 SAIJ125AX1000-20 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 1000 mm nominal stroke down to 980 mm. It allows precise end-position tuning at commissioning without adding external stops.
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