Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 185mm 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
- Stroke185 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10S
The AirTAC SAIJ125X185-10-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 175 to 185 mm. Built with a 125 mm bore, it delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides for straightforward switch mounting.
This specific SKU is configured with a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and features a PT tapered port thread. The rear adjustment mechanism allows technicians to dial in the retract end-position during commissioning without adding bulky external stops. It operates at speeds of 30 to 500 mm/s and utilizes the standard SAIJ mounting set, which omits the FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 185 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 SAIJ125AX185-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×185 | 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 SAIJ125AX185-10S Is Used
Product Changeovers
Quickly modify the effective stroke by up to 10 mm during product size transitions on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the retract stop during machine commissioning to achieve exact material pressing or forming depths without external stoppers.
Heavy Load Positioning
Leverage the 125 mm bore's 6136 N push force to move heavy pallets or fixtures while micro-adjusting the end stop for alignment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10S the Right Cylinder?
Select this 125 mm bore cylinder when an application requires heavy thrust (up to 6136 N at 0.5 MPa) alongside precise end-position tuning; if you need less force, stepping down to an 80 mm bore provides 2513 N. The 10 mm adjustment window is ideal for product changeovers on a line, allowing you to shorten the stroke dynamically rather than swapping to a fixed-stroke SAI cylinder. Because the total stroke is 185 mm, side-loading is minimal, but always ensure the load is guided to prevent rod binding.
When matching this for an ISO 15552 replacement, verify the 125 mm bore, 185 mm stroke, 10 mm adjustment range, PT port thread, and the -S magnet option. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure; for true load-holding without continuous air, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder. The integrated -S magnet works seamlessly with AirTAC CMSE reed and DMSE solid-state 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 SAIJ125AX185-10S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. The maximum thrust is 1251 kgf at 1.0 MPa.
The rear adjuster screw allows you to shorten the 185 mm nominal stroke by up to 10 mm, providing a usable travel window of 175 to 185 mm. It acts as a physical stop to fine-tune the end position and does not lock the load without continuous air pressure.
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