Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-100S
The AirTAC SAIJ125X125-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5MPa and features a 32mm carbon steel rod with M27x2 threading. The integrated -S magnet enables position sensing with AirTAC CMSE reed or DMSE solid-state switches. A tapered PT port handles the high flow required by the 125mm bore.
With a nominal 125mm stroke and a 100mm adjustment range, this model provides a highly flexible 25-125mm usable travel window. You can dial back the retract end-position at commissioning without swapping the cylinder or adding external stops. The rear adjuster acts purely as a mechanical travel stop to fine-tune deceleration; it does not lock the load without live air pressure. For load-holding needs, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAIJ125X125-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SAIJ125X125-100S Is Used
Variable End-Stop Tuning
Fine-tune the retract position within a 25-125mm window during machine commissioning to set precise pressing or clamping depths without machining new hard stops.
Product Size Changeovers
Rapidly adapt a packaging line for different carton sizes by adjusting the rear stopper screw up to 100mm, eliminating the need to swap out the entire cylinder.
Heavy Assembly Pressing
Leverage the 6136N push force at 0.5MPa for heavy-duty assembly operations, using the adjustable travel limit to accommodate various part heights safely.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-100S the Right Cylinder?
Choose this 125mm bore adjustable-stroke cylinder when your application requires 6136N push force at 0.5MPa and on-the-fly end-position tuning across a 25-125mm travel window. If your setup only needs 2805N of push force, stepping down to a 63mm bore saves space and air consumption. Conversely, moving up to a 160mm bore yields 10053N for heavier loads. This SKU uses a PT tapered port thread and includes the -S magnet for electronic DMSE or reed CMSE sensors.
Selecting an adjustable SAIJ over a fixed SAI cylinder is ideal for machine setups that undergo frequent product changeovers, allowing you to reposition the end-stop quickly. To replace an ISO 15552 cylinder, match the 125mm bore, 125mm stroke, 100mm adjuster, PT port, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Although the stroke is under 300mm, the heavy 125mm rod still handles substantial side loads, though long unsupported loads need an external guide.
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 SAIJ125X125-100S FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 100mm. With the nominal 125mm stroke, this creates a usable travel window of 25-125mm, letting you set the exact retract end-position at commissioning. The adjuster is a mechanical stop, not a lock.
At 0.5MPa operating pressure, the 125mm bore generates 6136N of push force and 5734N of pull force. The -S option includes a magnet for position sensing, compatible with AirTAC CMSE reed switches and DMSE solid-state electronic sensors.
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