Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm 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.
- BoreØ125 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-10
The AirTAC SAIJ125X125-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a carbon steel rod and PT tapered port threads. An external stopper screw allows you to shorten the effective travel, creating a precise 115-125mm usable stroke window for exact end-position tuning.
This adjustable design eliminates the need to swap cylinders or bolt on external stops during machine commissioning. The extruded aluminum barrel includes dual sensor grooves, and the rear adjuster functions strictly as a travel stop, not a lock, meaning it will not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAIJ125X125-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | 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 SAIJ125 Adjustable Cylinder SAIJ125X125-10 Is Used
End-Position Tuning
Dial in the exact retract distance within the 115-125mm window during machine setup to perfect part seating without changing hardware.
Product Changeover
Quickly adjust the stroke end by up to 10mm on the fly to accommodate slight variations in incoming product sizes on the line.
High-Force Positioning
Leverage the 6136N push force at 0.5 MPa to move heavy fixtures while relying on the rear stop to set precise mechanical limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-10 the Right Cylinder?
Choose this 125mm bore when you need higher thrust than a 100mm cylinder (which provides 3927N push at 0.5 MPa) but want to avoid the bulk of a 160mm unit. The 10mm adjustment window is ideal for fine-tuning retract end positions during product changeovers. For load-holding without continuous air pressure, an external rod lock or the AirTAC SAIL lock variant is required, as the adjuster only sets the travel end.
To match this ISO 15552 cylinder for a retrofit, specify: 125mm bore, 125mm stroke, 10mm adjustment, PT G1/2 port, and a mounting set limited to Basic, FA, LB, TC, FTC, TCM1, or TCM2. Because the stroke is 125mm, standard external guiding is recommended to handle side loads. No magnet is specified, so CMSE or DMSE sensors cannot be used without adding the -S option.
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 SAIJ125X125-10 FAQ
A rear stopper screw lets you trim the effective stroke back by up to 10mm, creating a 115-125mm travel window. It acts as a mechanical stop to fine-tune the end position and does not lock the load without air pressure.
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
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