Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-30S 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 SAIJ125X225-30S
The AirTAC SAIJ125X225-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its integrated magnet supports position sensing via CMSE reed or DMSE electronic switches. By turning the rear screw, you achieve a usable travel window of 195 to 225 mm, enabling precise end-position tuning without swapping hardware.
This bore features a robust 32mm carbon steel rod and M27x2 thread, paired with PT tapered port threading and a G1/2 air port. The extruded aluminum barrel includes sensor grooves on both sides. The rear adjuster acts strictly as a travel stop for commissioning flexibility, not a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-30S |
|---|---|
| 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 SAIJ125X225-30S
| 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 SAIJ125X225-30S Is Used
Product Changeover
Dial in the 195-225mm travel window during packaging line format changes to accommodate varying carton sizes without changing the cylinder.
Commissioning Calibration
Fine-tune the exact end-of-stroke position during machine setup to prevent mechanical crashes, using the rear stopper instead of external shims.
Variable End Stops
Provide adjustable physical stops for machining fixtures where the effective retraction point must be tweaked between production runs.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-30S the Right Cylinder?
Choose this adjustable-stroke model when your setup requires on-the-fly end-position changes or product-size changeovers, avoiding the need to bolt on external stops or buy a fixed-stroke SAI cylinder. If your application requires less force, stepping down to a 100mm bore yields 3927N at 0.5 MPa; stepping up to a 160mm bore provides 10053N. Because the 225mm stroke is under the 300mm side-load threshold, standard mounting is less demanding, though external guides are always recommended for heavy radial loads.
For ISO 15552 dimensionally interchangeable replacements, match the 125mm bore, 225mm stroke, PT port threads, and the -S magnet. Remember that the rear adjuster and air cushions only decelerate the load; they do not hold position without live air. For true load-holding without pneumatic pressure, consider an AirTAC SAIL or BSAI cylinder. 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 SAIJ125X225-30S FAQ
At 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw lets you trim the effective stroke by up to 30mm. This creates a usable travel window of 195 to 225mm, allowing you to set the exact retraction end-point during installation without replacing the cylinder.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-30S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.