Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 750mm 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
- Stroke750 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-100
The AirTAC SAIJ125X750-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to a 650-750 mm window. Equipped with a 32 mm SUS420J2 stainless steel rod, it provides 8590 N of push force at 0.7 MPa. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches.
This model uses PT tapered port threads (G1/2) and relies on a 40 mm variable air cushion at both ends to decelerate the heavy 125 mm piston. The rear stopper screw lets you dial in the exact retract position during commissioning without adding external physical stops. Remember that this adjuster acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 750 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 SAIJ125AX750-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×750 | 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 SAIJ125AX750-100 Is Used
Product Changeover
Quickly modify the retract endpoint by up to 100 mm to accommodate varying product lengths on the same conveyor line without changing cylinders.
Assembly Press Positioning
Fine-tune the 650-750 mm travel window during machine setup to achieve precise end-position alignment for heavy-duty pressing tasks.
Variable End Stops
Use the rear adjuster screw to establish custom physical stops for multi-tiered packaging operations requiring different stroke depths.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-100 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore is insufficient, stepping up from its 5497 N push force at 0.7 MPa to a robust 8590 N. The 100 mm rear adjustment range is ideal for accommodating product size changes on a line, allowing operators to set new retract endpoints on the fly. For load-holding requirements without live pressure, this cylinder will not suffice; you should look at the SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 750 mm stroke, 100 mm adjustment range, PT G1/2 port, and your required mounting bracket from the SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2. Because the stroke is 750 mm, the long unsupported rod is susceptible to side-loading; an external guide is highly recommended to prevent premature seal wear.
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 SAIJ125AX750-100 FAQ
At a 0.7 MPa operating pressure, this 125 mm bore cylinder generates 8590 N of push force and 5734 N of pull force. It can reach a maximum of 11045 N at 1.0 MPa.
The rear adjuster acts as a mechanical stop that allows you to shorten the nominal 750 mm stroke by up to 100 mm, creating a usable travel window of 650 to 750 mm. It only sets the end position and does not lock or hold the load without continuous air pressure.
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