Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-75S
The AirTAC SAIJ125X100-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136N push force at 0.5MPa and provides a usable travel window of 25-100mm, letting you dial back the nominal 100mm stroke by up to 75mm during machine setup. The integrated -S magnet supports position sensing with CMSE reed or DMSE electronic switches.
This adjustable model uses a carbon steel rod and tapered PT porting. The rear stopper acts purely as a travel end-deceleration point, not a load-holding lock; for dead-air load retention, consider an external rod lock or the related SAIL series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125X100-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125X100-75S Is Used
Variable End-Stop Calibration
Dial in the exact retraction point within the 25-100mm window during machine commissioning without swapping hardware.
Product Size Changeover
Quickly adapt the effective stroke on packaging lines when switching between different product dimensions.
Position Sensing Setup
Leverage the -S magnet with DMSE electronic sensors to verify the adjusted end position in automated assemblies.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-75S the Right Cylinder?
Choose this 125mm bore when a 100mm stroke requires extensive fine-tuning at commissioning, such as setting variable end stops for different product sizes on a line. If your application needs less force, stepping down to an 80mm bore yields 2513N push at 0.5MPa. Conversely, upgrading to a 160mm bore provides 10053N for heavier loads.
Because the stroke is 100mm, side-load stress is minimal, but long unsupported strokes still need an external guide. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. For a fixed end position without the adjustment screw, use the standard SAI cylinder.
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 SAIJ125X100-75S FAQ
At 0.5MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the 100mm nominal stroke by up to 75mm, creating a usable travel window of 25-100mm. The adjuster sets the travel end and cushions the stop, but it does not hold the load without live air pressure.
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