Airtac SAIJ125 Adjustable Cylinder SAIJ125X60-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X60-20S 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 SAIJ125X60-20S
The AirTAC SAIJ125X60-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the effective travel window down to 40-60 mm from its 60 mm nominal stroke. Delivering 6136 N of push force at 0.5 MPa, it is built for heavy-duty positioning tasks. The integrated -S magnet supports AirTAC CMSE reed and DMSE solid-state sensors via the dual-side barrel grooves.
This model features a standard carbon steel piston rod with an M27x2 thread and PT tapered ports. The rear adjuster acts purely as a mechanical stop to dial in end positions during commissioning; it does not lock the load without live air pressure. For load-holding without continuous air, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X60-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X60-20S |
|---|---|
| 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 SAIJ125X60-20S
| 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 SAIJ125X60-20S Is Used
Product Changeover
Dial in the 40-60 mm travel window during format size changes on a packaging line without replacing the cylinder.
Machine Setup
Fine-tune the retract end position during initial commissioning to perfectly time heavy 6136 N push operations.
Variable End Stops
Adjust the mechanical stop on the fly to accommodate varying material thicknesses in large press feeding.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X60-20S the Right Cylinder?
Choose this 125 mm bore when 80 mm (2513 N at 0.5 MPa) lacks the thrust for moving heavy jigs, but a 160 mm bore (10053 N) would be excessive. The 20 mm adjustment range is ideal for product changeovers, letting you shift the retract end-stop without swapping the cylinder or adding external stops. Since the stroke is under 300 mm, side-load stress on the M27x2 rod is minimal, though external guides are still recommended for heavy lateral loads.
For an exact ISO 15552 replacement match, configure with: 125 mm bore, 60 mm stroke, 20 mm adjustment, PT port threads, carbon steel rod, and -S magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2 (note the omission of FB, CA, CB, and CR). The operating speed is 30-500 mm/s.
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 SAIJ125X60-20S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 1251 kgf at its maximum 1.0 MPa pressure.
The rear adjuster screw lets you shorten the 60 mm nominal stroke by up to 20 mm, creating a 40-60 mm usable travel window. This stopper only sets the end position and does not hold the load without live air pressure.
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Standard models usually ship in 3-4 days.
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