Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 600mm 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
- Stroke600 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-75
The AirTAC SAIJ125X600-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5MPa. It features a 125mm bore, a 600mm nominal stroke, and a PT tapered port thread. An external adjusting screw allows you to shorten the effective travel by up to 75mm, creating a precise 525-600mm usable stroke window without swapping out the entire unit.
This adjustable capability is ideal for fine-tuning end positions during machine commissioning or product changeovers. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches. Operating at speeds of 30-500mm/s, it utilizes a robust 32mm carbon steel rod and M27x2 rod thread to handle demanding loads.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 600 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 SAIJ125X600-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×600 | 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 SAIJ125X600-75 Is Used
Variable End-Stop Positioning
Dial in the retract position within the 525-600mm window during machine commissioning to accommodate different product sizes without adding external mechanical stops.
Heavy-Duty Forming
Leverage the 6136N push force at 0.5MPa for pressing or forming operations where the exact bottoming-out position must be fine-tuned on the production floor.
Automated Line Changeover
Quickly adjust the stroke length by up to 75mm when switching a manufacturing line to a new product variant, minimizing downtime and mechanical rework.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-75 the Right Cylinder?
Choose this 125mm bore cylinder when an application requires substantial thrust, such as 6136N push force at 0.5MPa, combined with variable end-stop positioning. If your setup needs less force, stepping down to a 100mm bore provides 3927N push force at 0.5MPa. The adjustable stroke is favored over a fixed SAI cylinder when you need to dial in the exact retract position on the fly, rather than machining external stops. For any stroke of 600mm, an external guide is recommended to prevent excessive rod side-loading.
To match this ISO 15552 dimensionally interchangeable cylinder, confirm the 125mm bore, 600mm stroke, 75mm adjustment range, PT port thread, and standard carbon steel rod. Because this model lacks the -S magnet option, it will not work with CMSE or DMSE sensors. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pressure, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ125X600-75 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster screw acts as a mechanical stop that lets you trim the effective travel back by up to 75mm from the 600mm nominal stroke, providing a usable travel window of 525-600mm. It functions as a stop and does not lock the load without continuous air pressure.
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