Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-75S 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 SAIJ125AX1000-75S
The AirTAC SAIJ125X1000-75-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 built-in magnet for position sensing. Because the nominal 1000mm stroke includes a 75mm adjustment range, you can fine-tune the effective travel anywhere between 925mm and 1000mm during commissioning.
This model uses PT tapered port threads (G1/2) and operates at speeds of 30-500mm/s. The rear screw mechanism acts purely as a travel stop to set the retract end position; it is not a locking device and will not hold a load without live air pressure. For load-holding requirements, consider an external rod lock or the AirTAC SAIL series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-75S |
|---|---|
| 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 SAIJ125AX1000-75S
| 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 SAIJ125AX1000-75S Is Used
Long-Stroke Machining
Fine-tune the 925-1000mm travel window to precisely position large parts without re-engineering fixed stops on heavy machining lines.
Product Changeover
Dial in the retract end-position by up to 75mm to accommodate different package sizes on a conveyor without changing the cylinder.
Automated Assembly
Leverage 6136N of thrust at 0.5MPa to push heavy components, using the rear stopper to dial in the exact final resting position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-75S the Right Cylinder?
Choose this 125mm bore when a 100mm bore falls short (providing only 3927N push at 0.5MPa) but you want to avoid stepping up to a 160mm bore. The adjustable 925-1000mm travel window is perfect for applications requiring variable end-stops or product size changeovers, saving you from swapping out a fixed-stroke SAI cylinder.
When replacing an ISO 15552 cylinder, match the 125mm bore, 1000mm stroke, 75mm adjustment, PT G1/2 port, and -S magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is 1000mm, the 32mm rod needs external guiding to prevent excessive side-loading on the seals. Position detection is handled by CMSE reed or DMSE electronic sensors.
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 SAIJ125AX1000-75S FAQ
At 0.5 MPa it provides 6136N of push force and 5734N of pull force. If you need maximum thrust, it can deliver up to 1251 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the 1000mm nominal stroke by up to 75mm, creating a usable travel window of 925-1000mm. It functions as a hard stop for end-position tuning, not as a load-holding lock.
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Standard models usually ship in 3-4 days.
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