Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 85mm 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
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10S
The AirTAC SAIJ125X85-10-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 75-85 mm usable travel window, allowing you to dial back the 85 mm nominal stroke by up to 10 mm during commissioning without adding external stops. In the 125 mm bore class, it generates 6136 N of push force and 5734 N of pull force at 0.5 MPa.
This variant includes a SUS420J2 stainless steel rod for improved corrosion resistance and a built-in magnet (-S) for CMSE reed and DMSE electronic sensors. The extruded aluminum barrel features sensor grooves on both sides, and the PT tapered port threads ensure a tight pneumatic connection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 85 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 SAIJ125AX85-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×85 | 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 SAIJ125AX85-10S Is Used
Machine Setup Changeover
Fine-tune the 75-85 mm travel window during product line changeovers to accommodate varying package sizes without swapping cylinders.
Variable End-Stop Positioning
Dial in the exact retract position during equipment commissioning to prevent mechanical crashes and optimize cycle timing.
High-Force Clamping
Leverage the 6136 N push force at 0.5 MPa for heavy-duty clamping tasks where the final clamping position needs minor on-site adjustments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10S the Right Cylinder?
Choose this 125 mm bore when your application requires roughly 6000 N of force at 0.5 MPa; stepping down to a 100 mm bore drops the push force to 3927 N. An adjustable stroke is ideal for machine setups requiring variable end stops or product-size changeovers, whereas a fixed-stroke SAI cylinder suits dedicated single-task lines. Remember, the rear adjuster acts only as a travel stop to decelerate the load—it does not hold position without live air. For load-holding without pressure, consider an external rod lock or the AirTAC BSAI clamp-lock series.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 85 mm stroke, 10 mm adjustment range, PT port threads, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, 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 SAIJ125AX85-10S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can deliver up to 11045 N of push force at 0.9 MPa.
The rear adjuster screw acts as an external stopper, allowing you to shorten the effective stroke from 85 mm down to 75 mm. This provides a 75-85 mm adjustable travel window for fine-tuning the end position without replacing the cylinder.
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