Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 95mm 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
- Stroke95 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-20S
The AirTAC SAIJ125X95-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a robust 6136N push force at 0.5 MPa and features a carbon steel piston rod with an M27x2 thread. Because this specific SKU carries the -20 adjustment code, you can dial back the 95mm nominal stroke by up to 20mm, creating a precise 75-95mm usable travel window for product changeovers.
This model includes a magnet for position sensing, working seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches fitted into the dual-side sensor grooves of the extruded aluminum barrel. The rear adjuster acts purely as a mechanical stop to fine-tune the end position without adding external stops. It does not lock the load; for true load-holding without live air pressure, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 95 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 SAIJ125X95-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×95 | 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 SAIJ125X95-20S Is Used
Variable End-Stop Tuning
Dial in the exact retract position within a 75-95mm window during machine commissioning without swapping out the entire cylinder or bolting on external mechanical stops.
Product Size Changeover
Quickly adjust the stroke length on packaging or assembly lines when product dimensions change, using the rear screw to set the new end position efficiently.
High-Force Positioning
Leverage the 6136N thrust at 0.5 MPa for heavy-duty positioning tasks while relying on the integrated CMSE/DMSE sensors to confirm end-of-travel feedback.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-20S the Right Cylinder?
Select this 125mm bore cylinder when your application requires high thrust (6136N at 0.5 MPa) alongside variable end-position tuning. If your force requirements are lower, stepping down to the 100mm bore yields 3927N at 0.5 MPa, whereas moving up to the 160mm bore provides 10053N. The adjustable stroke is ideal for machine setups requiring a variable end-stop, replacing the need to swap fixed-stroke SAI cylinders during commissioning.
When replacing an ISO 15552 cylinder, verify the 125mm bore, 95mm stroke, 20mm adjustment range, PT tapered port threads, and the -S magnet. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, intentionally omitting FB, CA, CB, and CR brackets. Operating speed is 30-500 mm/s.
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 SAIJ125X95-20S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides a push force of 6136N and a pull force of 5734N. At the maximum pressure of 1.0 MPa, it delivers a maximum push force of 11045N.
The rear adjuster screw allows you to shorten the 95mm nominal stroke by up to 20mm, providing a usable travel window of 75-95mm. This mechanical stop fine-tunes the end position at commissioning but does not hold the load without live air pressure.
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