Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-50
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 125mm 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.
- BoreØ100 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-50
The AirTAC SAIJ100X125-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the 125 mm nominal travel by up to 50 mm. This creates a precise 75 to 125 mm usable window, enabling rapid end-position tuning during commissioning or product changeovers without swapping out the unit. It delivers robust thrust, generating 3927 N of push force and 3681 N of pull force at 0.5 MPa.
This model incorporates a SUS420J2 stainless steel rod (material code A) for superior corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, ready to accept CMSE reed or DMSE electronic solid-state switches if a magnet is later required. The rear screw acts purely as a travel stop to set deceleration limits and does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-50 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×125 | 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 SAIJ100 Adjustable Cylinder SAIJ100AX125-50 Is Used
Packaging Line Diverter
Fine-tune the 75-125 mm travel window to push varying carton sizes without repositioning the entire cylinder mount.
Machine Setup Changeover
Use the rear adjusting screw to quickly set new retract end positions during product family transitions on the factory floor.
Pressing Station Stop
Leverage the 3927 N push force to seat components, dialing in the exact 125 mm maximum travel to prevent over-travel.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-50 the Right Cylinder?
Choose this 100 mm bore when your application requires substantial force, stepping up from a 63 mm bore that provides 1559 N push at 0.5 MPa. The adjustable stroke is ideal for packaging lines that handle varying product sizes, allowing operators to fine-tune the end stop on the fly rather than installing fixed external stops. For load-holding without continuous air pressure, this cylinder is not a lock; you would need to specify a SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 100 mm bore, 125 mm stroke, 50 mm adjustment range, G1/2 port, and PT tapered thread. The SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the 25 mm rod and M20x1.5 thread handle high side loads well, this profile cylinder maintains rigidity, though any stroke over 300 mm would still require an external guide.
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 SAIJ100 Adjustable Cylinder SAIJ100AX125-50 FAQ
The rear stopper screw lets you shorten the effective stroke by up to 50 mm from the 125 mm nominal length, providing a usable travel window of 75 to 125 mm. This allows precise end-position tuning at commissioning without external stops.
At 0.5 MPa operating pressure, this 100 mm bore cylinder generates 3927 N of push force and 3681 N of pull force. It can reach up to 7068 N of push force at 0.9 MPa.
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