Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 190mm 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
- Stroke190 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-20
The AirTAC SAIJ125X190-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster, engineered to deliver a robust 6136N push force at 0.5MPa. By turning the rear stopper screw, you can trim the nominal 190mm stroke back by up to 20mm, creating a precise 170-190mm usable travel window for exact end-position tuning during commissioning. The extruded aluminum barrel design incorporates sensor grooves on both sides, ensuring easy integration of sensing equipment.
This specific SKU is configured with a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and features a PT tapered G1/2 port. It supports a speed range of 30-500mm/s and includes adjustable air cushions at both ends to decelerate heavy loads smoothly. The rear adjuster acts strictly as a travel stop to fine-tune the retract position without needing external stops, but it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 190 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 SAIJ125AX190-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×190 | 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 SAIJ125AX190-20 Is Used
Press Stroke Calibration
Dial in the exact 170-190mm travel window during machine commissioning to accommodate varying material thicknesses without swapping out the entire actuator.
Product Changeover Stops
Quickly adjust the retract end-position by up to 20mm on a packaging line when switching between different product sizes, ensuring precise mechanical stops.
Heavy Load Positioning
Leverage the 6136N push force to move heavy assemblies into place, relying on the rear stopper to fine-tune the final resting position within the 170-190mm range.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-20 the Right Cylinder?
Selecting this 125mm bore cylinder is ideal when your application requires the 6136N push force at 0.5MPa, which sits comfortably above the 3927N provided by the 100mm bore but below the massive 10053N output of the 160mm variant. The adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops to accommodate product changeovers or fine-tune the retract distance on the fly. Because this model lacks a magnet for sensors, position detection requires external switches.
For load holding without continuous air pressure, this cylinder is insufficient as the rear adjuster and air cushions only set travel ends and do not function as a brake; you should consider the SAIL (air-released lock) or BSAI (clamp-lock) series instead. When replacing an ISO 15552 cylinder, match the 125mm bore, 190mm nominal stroke, 20mm adjustment, PT G1/2 port, and SUS420J2 rod. Since the 190mm stroke is below the 300mm threshold, side-load concerns are minimal, but an external guide is still recommended for heavy lateral loads. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ125AX190-20 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides a push force of 6136N and a pull force of 5734N. At its maximum 1.0MPa pressure, it can deliver up to 1251kgf.
The rear adjuster screw allows you to shorten the nominal 190mm stroke by up to 20mm, providing a usable travel window of 170-190mm. This stopper fine-tunes the retract end-position but does not lock or hold the load without live air pressure.
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