Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 60mm 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
- Stroke60 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-20S
The AirTAC SAIJ125X60-20-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 60mm nominal stroke can be fine-tuned down by up to 20mm, providing a usable travel window between 40mm and 60mm. This adjustability allows precise end-position tuning during commissioning without swapping the cylinder or adding external stops.
This SKU features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. It uses PT tapered ports and operates at speeds of 30-500mm/s. The rear adjuster acts strictly as a travel stop for deceleration, not a lock, meaning it will not hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 60 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 SAIJ125AX60-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×60 | 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 SAIJ125AX60-20S Is Used
Machine Setup Changeover
Quickly fine-tune the 40-60mm travel window during product family changeovers, using the rear stopper to set exact end positions without installing external hard stops.
Variable End-Stop Diverter
Provides a robust 6136N push force to divert packages on a conveyor, with the 20mm adjustment allowing operators to tweak the stopping distance for varying product sizes.
Heavy-Duty Clamping Fixture
Delivers reliable clamping for large workpieces, using the SUS420J2 stainless rod to resist corrosion in harsh industrial environments while accommodating slight size variations in raw stock.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-20S the Right Cylinder?
Choose this 125mm bore when an application requires substantial thrust that smaller bores cannot provide; for context, stepping down to a 100mm bore drops the 0.5MPa push force to 3927N. The adjustable 40-60mm window is ideal for product-size changeovers on a line, allowing operators to dial in the exact end-stop without machining new hard stops. If true load-holding is required without continuous air pressure, a plain SAIJ is insufficient and a SAIL (air-released lock) or BSAI (clamp-lock) cylinder should be specified instead.
To match this exact ISO 15552 interchangeable replacement, confirm the 125mm bore, 60mm stroke, 20mm adjustment range, PT port thread, and the -S magnet option. Mounting choices include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets.
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 SAIJ125AX60-20S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw allows you to shorten the 60mm nominal stroke by up to 20mm, creating a usable travel window of 40-60mm. This stopper only sets the travel end and does not lock the load without live air pressure.
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