Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-100S 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 SAIJ125AX170-100S
The AirTAC SAIJ125X170-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 100 mm. This creates a highly flexible 70-170 mm usable window, letting you dial in the exact retract end-position during commissioning without swapping out the actuator or adding external stops. It delivers robust thrust, pushing 6136 N and pulling 5734 N at 0.5 MPa.
Equipped with a SUS420J2 stainless steel rod (material code A) and a built-in magnet for position sensing, this unit supports AirTAC CMSE reed and DMSE electronic solid-state switches via sensor grooves on both sides of the extruded aluminum barrel. The generous 100 mm adjustment range is perfect for machines that frequently process varying product sizes, while the PT G1/2 ports and 40 mm cushion strokes manage deceleration at both ends.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-100S |
|---|---|
| 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 SAIJ125AX170-100S
| 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 SAIJ125AX170-100S Is Used
Product Changeovers
Quickly modify the retract distance by up to 100 mm on packaging lines handling multiple carton sizes without changing the cylinder.
Machine Setup Tuning
Fine-tune the end-of-stroke position during initial commissioning to achieve perfect mechanical alignment without external shims.
Variable End Stops
Provide a customizable physical stop for heavy forming operations needing precise 70 to 170 mm travel distances.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-100S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore falls short (offering 3927 N push at 0.5 MPa) but you want to avoid stepping up to a 160 mm unit that pushes 10053 N. The adjustable stroke is selected over a fixed SAI cylinder when you need variable end-stops for rapid product changeovers or fine-tuning at setup. Because the rear adjuster acts only as a travel stop and the air cushions handle deceleration, neither will hold a load without live air pressure; for true load-holding, consider an external rod lock or the AirTAC SAIL and BSAI series.
For a precise ISO 15552 replacement match, confirm the 125 mm bore, 170 mm stroke, 100 mm adjustment range, PT G1/2 port, and the -S magnet option. Mounting choices are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the 170 mm stroke is below the 300 mm threshold, side-load stress is minimal, but always ensure the M27x2 rod thread is properly aligned to maximize bearing life.
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 SAIJ125AX170-100S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 170 mm nominal stroke by up to 100 mm, creating a usable travel window of 70 to 170 mm. It sets the end position but does not lock the load without live air pressure.
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