Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 80mm 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
- Stroke80 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-75S
The AirTAC SAIJ125X80-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its integrated PT tapered ports and 32mm carbon steel rod handle heavy loads, while the extruded aluminum barrel features sensor grooves on both sides for flexible mounting. Because this SKU includes a magnet, it works seamlessly with AirTAC CMSE reed and DMSE electronic sensors for precise end-of-stroke detection.
With an 80mm nominal stroke and a 75mm adjustment code, this model provides a highly variable usable travel window from 5 to 80mm. This wide adjustment range allows you to dial in the exact retract end-position during commissioning or product changeovers without swapping out the cylinder or adding external mechanical stops. The rear screw acts purely as a travel stop to set the end position, relying on the standard air cushion for deceleration, but it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 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 SAIJ125X80-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SAIJ125X80-75S Is Used
Variable End-Stop Positioning
Ideal for assemblies requiring precise retract positions, allowing operators to trim the 80mm stroke down to 5mm to accommodate varying material thicknesses without changing hardware.
Machine Changeover
Speeds up product line changeovers by letting technicians quickly re-adjust the cylinder's travel window rather than physically swapping out components for new part sizes.
Heavy-Duty Clamping
Leverages the 6136N push force at 0.5 MPa to secure heavy workpieces, using the rear stopper to fine-tune the clamping depth precisely during initial setup.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-75S the Right Cylinder?
Choose this 125mm bore when you need substantial thrust, such as the 6136N push or 5734N pull force at 0.5 MPa, but require highly variable end-stops for frequent product size changes. If your application needs less force, stepping down to an 80mm bore yields 2513N push force, whereas moving up to a 160mm bore provides 10053N. Select this adjustable SAIJ over a fixed-stroke SAI when a machine setup demands on-the-fly travel tuning rather than machining hard stops.
When matching ISO 15552 replacements, verify the 125mm bore, 80mm stroke, 75mm adjustment range, PT port threads, and the -S magnet option. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the 80mm stroke is relatively short, side-load stress is minimal, but always ensure the load is guided to prevent binding. For applications requiring the load to be held without continuous air pressure, note that this cylinder's adjuster is not a lock; consider an AirTAC SAIL or BSAI model 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 SAIJ125X80-75S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw allows you to mechanically shorten the effective stroke from its 80mm nominal length down to as little as 5mm, creating a 5-80mm usable travel window. This stopper sets the end position but does not lock the load without continuous air pressure.
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