Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-50 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 SAIJ125AX600-50
The AirTAC SAIJ125X600-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits precise end-position tuning. It provides a usable travel window of 550 to 600 mm, enabling on-the-fly stroke shortening during machine commissioning or product changeovers without swapping the cylinder or adding external stops. This heavy-duty model delivers a robust 6136 N pull force at 0.5 MPa and operates at speeds of 30-500 mm/s.
This SKU is equipped with a SUS420J2 stainless steel rod (option A) for enhanced durability against side loads, paired with a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-50 |
|---|---|
| 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 SAIJ125AX600-50
| 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 SAIJ125AX600-50 Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 550-600 mm window during machine commissioning to accommodate varying product sizes without external stopper blocks.
Heavy Product Changeover
Quickly adjust the stroke by up to 50 mm on automated assembly lines to handle different part lengths, leveraging the 6136 N pull force for heavy actuation.
Long-Stroke Assembly Press
Use the 600 mm nominal stroke for deep-reaching clamping or pressing tasks, fine-tuning the end position to prevent overtravel and ensure consistent process control.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-50 the Right Cylinder?
Choose this 125 mm bore when your application requires substantial thrust, such as the 6136 N pull force at 0.5 MPa, and step down to the 100 mm bore providing 3681 N pull if lower force is acceptable. The adjustable stroke is ideal for variable end-stops and machine setup fine-tuning, whereas a fixed SAI cylinder is better for rigid, non-adjustable travel. For this 600 mm stroke, an external guide is strongly recommended to prevent rod binding and manage side loads over long unsupported distances.
When selecting, confirm the 50 mm adjustment range meets your travel window needs and note that the PT port thread requires matching tapered fittings. The rear adjuster acts solely as a travel stop and does not hold the load without live air; for pilot-operated load holding, consider the SAIL or BSAI series instead. This cylinder is dimensionally interchangeable per ISO 15552.
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 SAIJ125AX600-50 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. At the maximum pressure of 1.0 MPa, it delivers a push force of 11045 N.
The rear external adjusting screw acts as a mechanical stopper, allowing you to shorten the effective stroke by up to 50 mm. This creates a usable travel window between 550 mm and 600 mm, enabling fine-tuning of the end position without replacing the cylinder.
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