Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-75S 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 SAIJ125AX170-75S
The AirTAC SAIJ125X170-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the end position at commissioning without adding external stops. With a 170 mm nominal stroke and a 75 mm adjustment range, it provides a highly flexible 95-170 mm usable travel window for product-size changeovers. It delivers a robust 6136 N push force at 0.5 MPa, stepping up to 11045 N at 0.9 MPa, making it suited for heavy-duty positioning tasks.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and includes a built-in magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors housed in the dual-side sensor grooves. The extruded aluminum barrel design maintains standard ISO 15552 mounting dimensions while operating at speeds of 30-500 mm/s.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-75S |
|---|---|
| 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 SAIJ125AX170-75S
| 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 SAIJ125AX170-75S Is Used
Heavy-Duty Press Fit
Dial in the exact 95-170 mm insertion depth during press assembly operations, allowing rapid tool adjustments for different component heights without changing cylinders.
Product Diverting
Adjust the retract stop on the fly to handle varying package sizes on a sorting line, fine-tuning the diverting stroke to accommodate different product profiles.
Machine Changeover
Speed up production line changeovers by turning the rear stopper screw to set new end positions, eliminating the need to physically swap out the entire actuator.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-75S the Right Cylinder?
Selecting this 125 mm bore over a smaller 100 mm option doubles the available thrust (6136 N versus 3927 N at 0.5 MPa), while a larger 160 mm bore would offer 10053 N if your application demands even higher force. The adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops for machine setup or product line changeovers, letting you dial in the exact 95-170 mm travel without swapping hardware.
For ISO 15552 replacement matching, ensure you specify the PT tapered port thread, the 170 mm stroke, the 75 mm adjustment range, and the -S magnet requirement. Because the stroke is 170 mm, ensure your mounting configuration supports the load to prevent excessive side-loading on the 32 mm rod. Remember that the rear adjuster is a travel stop, not a lock; if you need to hold a load without live air pressure, use an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead.
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 SAIJ125AX170-75S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjusting screw acts as a mechanical stopper that lets you trim the effective travel back from the 170 mm nominal stroke by up to 75 mm, creating a usable 95-170 mm travel window. The adjuster only sets the end position; it does not lock the load without live air pressure.
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