Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-20
The AirTAC SAIJ125X100-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates an 80 to 100 mm usable travel window. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning while allowing precise end-stop tuning during commissioning. This model uses a SUS420J2 stainless steel rod for superior wear resistance and features PT tapered port threads for a robust pneumatic seal.
Instead of adding external stoppers, the integrated rear screw lets you dial in the exact retract position on the fly. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if you add a magnet later. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125AX100-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125AX100-20 Is Used
Machine Changeover
Dial in the 80 to 100 mm retract position during product size changes without swapping hardware.
Heavy Clamping
Leverage 6136 N of thrust at 0.5 MPa to secure heavy workpieces while tuning the exact clamping depth.
End-Stop Tuning
Replace rigid fixed stops with a rear adjuster to perfect the stroke end position during line commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-20 the Right Cylinder?
Choose this 125 mm bore cylinder when an 80 mm bore falls short at 2513 N of push force, but you want to avoid stepping up to a 160 mm bore that delivers 10053 N. The 20 mm adjustable window is ideal for product changeovers where the exact end position varies by a few millimeters, letting you fine-tune the retract stop without swapping out the cylinder. Remember that the rear adjuster acts only as a travel stop; it does not hold the load without live air. For load-holding without pressure, use a SAIL or BSAI cylinder. For ISO 15552 replacement, match the 125 mm bore, 100 mm stroke, PT port, and mounting.
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 SAIJ125AX100-20 FAQ
At 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 8590 N push at 0.7 MPa.
The nominal stroke is 100 mm, but the rear adjuster screw allows you to shorten the effective travel by up to 20 mm, creating an 80 to 100 mm usable window for fine-tuning end positions.
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