Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-75 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 SAIJ125AX170-75
The AirTAC SAIJ125X170-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits on-the-fly end-position tuning. With a nominal 170 mm stroke and a 75 mm adjustment range, you achieve a usable travel window of 95 to 170 mm, eliminating the need to physically swap cylinders during product changeovers.
Delivering 8590 N of push force at 0.7 MPa, this robust unit utilizes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance. It features PT tapered port threads, dual-sided sensor grooves for mounting CMSE reed or DMSE electronic switches, and variable air cushions at both ends to decelerate heavy loads smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-75 |
|---|---|
| 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 SAIJ125AX170-75
| 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 SAIJ125AX170-75 Is Used
Variable End-Stop Positioning
Dial in the exact retract distance within the 95-170 mm window during machine setup to accommodate varying material thicknesses without external stopper blocks.
Product Size Changeover
Rapidly adjust the end-of-stroke position on packaging lines when switching between different package sizes, leveraging the 75 mm adjustment range for quick line transitions.
Heavy-Duty Pressing
Utilize the 8590 N push force at 0.7 MPa for precision pressing and forming operations where the final end-position needs micro-adjustments during initial commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-75 the Right Cylinder?
Selecting this 125 mm bore makes sense when your application requires substantial thrust—stepping up from a 100 mm bore yields a significant force increase from 5497 N to 8590 N at 0.7 MPa, while dropping to an 80 mm bore reduces output to 3518 N. Choose this adjustable-stroke SAIJ variant over a fixed SAI model when you need precise end-stop tuning during commissioning or frequent line size changeovers, allowing you to dial in the 95-170 mm travel window without adding external mechanical stops.
For replacement matching, verify the 125 mm bore, 170 mm stroke, 75 mm adjustment, PT G1/2 port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2—omitting FB, CA, CB, CR). Note that the rear adjuster acts strictly as a travel stop and does not hold the load without live air; for true load-holding without pressure, consider an external rod lock or the AirTAC SAIL or BSAI series.
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 SAIJ125AX170-75 FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder provides 8590 N of push force and 5734 N of pull force. It can deliver a maximum thrust of 11045 N at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective stroke from the nominal 170 mm down to 95 mm, creating a 95-170 mm travel window. The adjuster acts as a mechanical stop to fine-tune the retract position and is not a lock, meaning the cylinder requires live air to maintain position.
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