Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 85mm 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
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10
The AirTAC SAIJ125X85-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 85mm stroke that can be fine-tuned backward by up to 10mm, creating a precise 75-85mm usable travel window for commissioning without external stops. Delivering 6136N of push force at 0.5MPa, it handles heavy positioning tasks with a 32mm carbon steel rod and M27x2 thread.
This adjustable variant uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. The extruded aluminum barrel features sensor grooves on both sides for CMSE reed and DMSE electronic switches, though this specific SKU lacks the internal magnet required to trigger them. Operating speed spans 30-500mm/s, and the rear adjuster acts purely as a travel stop, not a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 85 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 SAIJ125X85-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×85 | 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 SAIJ125X85-10 Is Used
End-Position Tuning
Dial in the exact retract distance within the 75-85mm window during machine commissioning to perfect part ejection without adding external stopper blocks.
Product Changeover
Quickly adapt the cylinder's effective stroke on the packaging line when switching between different product sizes, using the 10mm adjustment screw to shift the end-stop.
Heavy Forming Stops
Leverage the 6136N push force for heavy-duty pressing or forming tasks, using the adjustable end-stop to precisely control the bottoming position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10 the Right Cylinder?
Choose this 125mm bore when your application requires substantial thrust—such as the 6136N push force at 0.5MPa or 8590N at 0.7MPa—and a variable end-stop. If your process needs less force, stepping down to the 100mm bore yields 3927N at 0.5MPa, while stepping up to the 160mm bore provides 10053N. The 10mm adjustment window is ideal for product-size changeovers where you need to dial in the exact retract position on the fly.
For ISO 15552 replacement matching, verify the 125mm bore, 85mm stroke, 10mm adjustment, PT tapered port threads, and standard carbon steel rod. Because this is a standard 85mm stroke, side-load risks are moderate, but always ensure proper guiding for heavy loads. Remember that the rear adjuster only sets the travel end; it does not hold the load without live air. For true load-holding, consider the SAIL or BSAI series.
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 SAIJ125X85-10 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 8590N.
The rear adjuster screw allows you to shorten the 85mm nominal stroke by up to 10mm, giving you a usable travel window of 75-85mm. It functions as a mechanical stop to fine-tune the end position and is not a load-holding lock.
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