Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 110mm 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
- Stroke110 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-20S
The AirTAC SAIJ125X110-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the nominal 110 mm travel to a precise 90-110 mm window. It delivers substantial thrust, offering 6136 N push and 5734 N pull force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The integrated magnet allows seamless position feedback using CMSE reed or DMSE electronic sensors mounted into the dual-side extruded barrel grooves.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and uses PT tapered port threads. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position during commissioning without adding external stops. It utilizes a reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and relies on variable air cushions at both ends for deceleration, but it will not hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 110 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 SAIJ125AX110-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×110 | 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 SAIJ125AX110-20S Is Used
Heavy Press Fit Tuning
Dial in the exact 90-110 mm retract position during machine setup to accommodate varying part heights without reengineering fixed hard stops.
Product Line Changeover
Quickly adjust the end-stop distance on automated assembly lines when switching between different product sizes or profiles.
Actuator Position Calibration
Fine-tune the travel limit during commissioning to prevent mechanical interference, using the rear screw to trim the 110 mm stroke precisely.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX110-20S the Right Cylinder?
Select this 125 mm bore cylinder when an application requires high force (6136 N at 0.5 MPa) alongside precise end-position tuning; if you need less force, stepping down to an 80 mm bore yields 2513 N push force. Choose the SAIJ adjustable-stroke design over a fixed SAI when you need variable end-stops for product changeovers without swapping the cylinder. For load-holding without live air pressure, this cylinder is insufficient since the adjuster is only a stop, not a lock; consider an SAIL or BSAI series instead. To match this ISO 15552 replacement exactly, specify the 125 mm bore, 110 mm stroke, 20 mm adjustment, PT ports, SUS420J2 rod, and the -S magnet.
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 SAIJ125AX110-20S 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 the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster acts as a mechanical stop that lets you shorten the nominal 110 mm stroke by up to 20 mm, creating a usable 90-110 mm travel window. It is a travel stop, not a lock, and the cylinder remains double-acting.
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