Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 120mm 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
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-100
The AirTAC SAIJ125X120-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Because this specific SKU carries a 100mm adjustment code on a 120mm nominal stroke, you can dial the effective travel back to anywhere between 20mm and 120mm during commissioning. This extreme adjustability eliminates the need to physically swap cylinders when adapting machinery to drastically different product sizes.
It features a robust 32mm carbon steel piston rod with an M27x2 thread, designed to handle significant side loads. The extruded aluminum barrel includes dual sensor grooves for direct mounting of CMSE reed or DMSE electronic switches, though this particular configuration does not include a magnet. Operating speed spans 30-500mm/s, and the rear adjuster acts purely as a mechanical stop, meaning it cannot hold a load safely without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 120 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 SAIJ125X120-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×120 | 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 SAIJ125X120-100 Is Used
Variable Product Changeover
Adapts automated lines to new packaging formats instantly by dialing the stroke from 120mm down to 20mm without changing hardware.
Heavy Forming End-Stops
Provides 6136N of thrust at 0.5 MPa for pressing operations, with fine rear-screw tuning to set precise material deformation depth.
Multi-Position Machine Setup
Replaces multiple fixed-stroke cylinders in a fixture, allowing operators to set distinct travel endpoints on the fly during initial machine commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-100 the Right Cylinder?
Choose this 125mm bore when an application requires heavy thrust that a 100mm bore cannot provide, or step down to a 100mm bore (offering 3927N push force at 0.5 MPa) if you need to reduce overall machine footprint and air consumption. The SAIJ125X120-100 is selected specifically for setups requiring extreme end-position variance; its 100mm adjustment window allows a single cylinder to manage a 20-120mm travel range without external stops.
When replacing an ISO 15552 cylinder, match the 125mm bore, 120mm stroke, PT tapered port thread, and mounting choice. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, but omits FB, CA, CB, and CR options. If your process requires true load-holding without continuous air pressure, note that the rear adjuster here is a stop, not a lock; you should instead evaluate the AirTAC SAIL or BSAI locking cylinder series.
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 SAIJ125X120-100 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At a maximum 1.0 MPa, it can deliver up to 1251 kgf.
The rear mechanical adjuster allows you to trim the effective travel from the nominal 120mm down to as little as 20mm, creating a 20-120mm usable window. It functions as a hard stop for end-position tuning and does not lock the load without live air.
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