Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-10
The AirTAC SAIJ125X225-10 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 6136N push force at 0.5 MPa and utilizes a standard PT G1/2 port. Equipped with a carbon steel piston rod and M27x2 rod threading, it handles heavy loads with robust mechanical stability.
This model provides a 215 to 225 mm usable travel window, allowing you to dial back the retract position by up to 10 mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. The rear adjuster acts purely as a travel stop for end-position tuning and does not lock the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAIJ125X225-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SAIJ125X225-10 Is Used
Machine Setup Calibration
Dial in the exact 215 to 225 mm retract position during initial machine commissioning without swapping cylinders.
Product Size Changeover
Quickly adjust the end-stop by up to 10 mm on packaging lines when processing slightly different carton or pallet dimensions.
Heavy Clamping Fixtures
Leverage the 6136N thrust to secure heavy workpieces while fine-tuning the clamping depth at the retract end.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-10 the Right Cylinder?
Choose this adjustable-stroke cylinder when your fixture requires precise end-stop tuning without machining external spacers. The 125 mm bore delivers 6136N push and 5734N pull at 0.5 MPa, making it a significant step up from the 80 mm bore (2513N). It supports a speed range of 30-500 mm/s and uses self-compensating air cushions at both ends to absorb kinetic energy.
For ISO 15552 replacement matching, specify a 125 mm bore, 225 mm stroke, up to 10 mm adjustment, PT G1/2 ports, and standard carbon steel rod material. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR variants. Because the 225 mm stroke is under 300 mm, side-load concerns are minimal, but an external guide is still recommended for heavy lateral loads. If your process requires holding the load without continuous air pressure, use an AirTAC SAIL or BSAI cylinder instead of relying on this rear stopper.
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 SAIJ125X225-10 FAQ
The rear adjuster screw lets you shorten the nominal 225 mm stroke by up to 10 mm, creating a 215 to 225 mm travel window. It functions as a mechanical stop to fine-tune the end position and does not act as a lock or brake.
At 0.5 MPa operating pressure, it provides 6136N of push force and 5734N of pull force. The maximum thrust is 1251 kgf at 1.0 MPa.
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