Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40S 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 SAIJ125AX170-40S
The AirTAC SAIJ125X170-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 8590 N push force at 0.7 MPa, making it well-suited for heavy-duty positioning tasks. The barrel is extruded aluminum, not a tie-rod design, ensuring a rigid yet lightweight structure.
This specific SKU provides a usable travel window of 130 to 170 mm, allowing you to trim the nominal 170 mm stroke back by up to 40 mm during commissioning. It includes a magnet for position sensing and features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance. The PT tapered port threads and integrated sensor grooves on both sides further streamline installation and maintenance.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40S |
|---|---|
| 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 SAIJ125AX170-40S
| 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 SAIJ125AX170-40S Is Used
Machine Changeover
Dial in the exact retract distance within the 130-170 mm window during product size changes without replacing the actuator.
Heavy Positioning
Leverage the 8590 N push force at 0.7 MPa to move heavy pallets or fixtures into their exact end-stop location.
Commissioning Calibration
Use the 40 mm rear adjustment screw to fine-tune the end position during setup, absorbing mechanical tolerances in the machine frame.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40S the Right Cylinder?
Choose this 125 mm bore when 80 mm falls short—delivering 8590 N at 0.7 MPa versus the 80 mm bore's 3518 N—or step down if your application requires less force. The adjustable stroke is ideal for product changeover, letting you fine-tune the retract end position without swapping the cylinder or adding external stops. For strokes of 170 mm, the 32 mm rod diameter handles moderate side loads, but an external guide is recommended for heavy off-center loads.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 170 mm stroke, 40 mm adjustment, PT G1/2 port, and the -S magnet. Note that the rear adjuster acts only as a travel stop, not a lock; the cylinder will not hold a load without live air. For true load-holding without pressure, consider the SAIL or BSAI series. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB, CA, CB, and CR.
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 SAIJ125AX170-40S 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 reach a maximum of 11045 N push at 0.9 MPa.
The rear adjuster screw lets you shorten the effective travel from the 170 mm nominal stroke down to 130 mm. It functions as a mechanical stop to set the retract end position and does not lock the load without continuous air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.