Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 170mm 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
- Stroke170 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-100S
The AirTAC SAIJ125X170-100-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a PT tapered port and a rear-mounted stroke adjuster. By incorporating a 100mm adjustment range on a 170mm nominal stroke, this unit provides a usable travel window of 70 to 170mm. This allows operators to dial in the exact retract end-position during commissioning without swapping out the barrel or adding external stops. The carbon steel rod and integrated -S magnet round out a robust, sensor-ready assembly.
Belonging to the 125mm bore class, it generates 6136N of push force and 5734N of pull force at 0.5MPa, climbing to a maximum of 1251 kgf at 1.0MPa. The extruded aluminum barrel includes sensor grooves on both sides, designed to seamlessly accept AirTAC CMSE reed and DMSE electronic solid-state switches. The rear adjuster acts purely as a travel stop for deceleration, meaning the load will not hold its position without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 170 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 SAIJ125X170-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×170 | 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 SAIJ125X170-100S Is Used
Variable End-Stop Tuning
Dial in the retract position anywhere from 70mm to 170mm during machine commissioning to achieve precise end-stop tuning without external shims.
Product Size Changeover
Quickly adapt a packaging or handling line to accommodate different product lengths by adjusting the rear stopper up to 100mm between production runs.
Sensor-Ready Assembly
The integrated -S magnet works directly with CMSE reed and DMSE electronic switches in the dual-side barrel grooves for precise position detection.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-100S the Right Cylinder?
Choose this 125mm bore when an application requires heavy thrust—such as 6136N at 0.5MPa—and a highly variable end-stop. If you need slightly less force, stepping down to the 100mm bore yields 3927N at 0.5MPa, whereas moving up to the 160mm bore provides 10053N at 0.5MPa. The 100mm adjustment span is ideal for product-size changeovers on a line, letting you shift the retract distance from 70mm to 170mm on the fly instead of replacing a fixed-stroke SAI cylinder.
Because the nominal stroke is 170mm, the 32mm rod diameter handles side loads well, but any machine layout pushing past 300mm of travel would require an external guide to prevent rod deflection. To replace an existing ISO 15552 cylinder, match the 125mm bore, 170mm stroke, PT port threads, and the -S magnet requirement. Note that SAIJ supports a reduced mounting set—Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting FB, CA, CB, and CR. For true load-holding without live air, select the SAIL or BSAI series instead of relying on this rear stopper.
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 SAIJ125X170-100S FAQ
This 125mm bore cylinder provides 6136N of push force and 5734N of pull force at 0.5MPa, with a maximum output of 1251 kgf at 1.0MPa. Its operational speed range is 30-500 mm/s.
A rear-mounted screw stopper allows you to trim the effective travel back by up to 100mm. This creates a usable stroke window of 70 to 170mm, enabling fine-tuning of the end position without replacing the cylinder.
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