Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 175mm 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
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-100
The AirTAC SAIJ125X175-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 175 mm travel by up to 100 mm. This creates a highly flexible 75-175 mm usable stroke window, perfect for accommodating product size changes on a line without physically swapping the actuator. It delivers substantial thrust, pushing with 8590 N at 0.7 MPa, making it suitable for heavy-duty positioning tasks.
This variant features an SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific unit ships without a magnet, meaning position sensing via AirTAC CMSE or DMSE switches requires adding the -S option. The rear screw acts purely as a travel stop to fine-tune the end position, while the integrated air cushions handle deceleration.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 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 SAIJ125AX175-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 SAIJ125AX175-100 Is Used
Variable End-Stop Positioning
Dial in precise retract distances between 75 and 175 mm on the fly, ideal for machinery that processes multiple product lengths and requires rapid changeover without mechanical rebuilds.
Heavy-Duty Machine Setup
Leverage the 8590 N push force at 0.7 MPa to shift heavy jigs or materials into place, using the rear adjuster to fine-tune the final resting position during initial commissioning.
Product Size Changeovers
Quickly adapt automated lines to new packaging dimensions by turning the rear stopper screw, trimming the cylinder's effective travel to match the new product size perfectly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-100 the Right Cylinder?
Choose this 125 mm bore when you need significantly more force than a 100 mm cylinder provides (5497 N push at 0.7 MPa) but want to avoid the bulk of a 160 mm unit (14074 N). The 100 mm adjustment range is exceptionally wide, allowing a single cylinder to cover multiple varying end-stop distances during commissioning or product changeover, unlike a fixed-stroke SAI model. If your application requires holding a load statically without continuous air pressure, note that this adjuster is only a stop; you should explore an SAIL air-released lock or BSAI clamp-lock cylinder instead.
For an exact ISO 15552 replacement, match the 125 mm bore, 175 mm stroke, 100 mm adjustment code, PT port thread, and your required mounting hardware from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the nominal stroke is 175 mm, side loads are moderate, but always ensure proper external guiding if pushing heavy off-center loads to protect the 32 mm rod and M27x2 rod thread.
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 SAIJ125AX175-100 FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N, and it reaches a maximum push force of 11045 N at 0.9 MPa.
The rear adjuster screw allows you to shorten the 175 mm nominal stroke by up to 100 mm, providing a usable travel window of 75 to 175 mm. This stopper sets the end position but does not lock the load without live air pressure.
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