Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 700mm 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
- Stroke700 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50
The AirTAC SAIJ125X700-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5 MPa and provides a usable travel window of 650 to 700 mm, letting you trim the retract position by up to 50 mm without adding external stops. The extruded aluminum barrel features sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches.
This specific SKU is configured with a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and PT tapered port threads. The rear adjuster acts purely as a mechanical stop to set the travel end and does not lock or hold the load without live air pressure. For applications requiring position holding without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 700 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 SAIJ125AX700-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 SAIJ125AX700-50 Is Used
Machine Setup & Changeover
Fine-tune the 650-700 mm travel end during product size changeovers without physically swapping cylinders or re-engineering external stopper blocks.
Variable End-Stop Positioning
Dial in the exact retract position during initial commissioning to perfectly align heavy 125 mm bore actuation points with downstream tooling.
Heavy-Duty Assembly Lines
Leverage 6136N of push force at 0.5 MPa for large presses, utilizing the rear adjuster to safely set the precise bottoming-out point for varying material thicknesses.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50 the Right Cylinder?
Choose this 125 mm bore cylinder when your application requires substantial thrust—stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513N, while stepping up to a 160 mm bore increases it to 10053N. The adjustable stroke is ideal for machine setups requiring fine end-position tuning during commissioning or product changeovers, replacing the need to swap out a fixed-stroke SAI cylinder. To match this exact ISO 15552 replacement, specify the 125 mm bore, 700 mm stroke, 50 mm adjustment, PT port thread, and no magnet (-S omitted).
With a 700 mm stroke, the 32 mm diameter rod is highly susceptible to side-loading; always use an external guide to prevent premature seal wear. This model operates at a maximum speed of 30-500 mm/s and uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting the FB, CA, CB, and CR brackets.
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 SAIJ125AX700-50 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides a push force of 6136N and a pull force of 5734N. If operated at 0.7 MPa, the push force increases to 8590N.
The rear adjusting screw allows you to shorten the effective stroke by up to 50 mm, creating a usable travel window of 650 to 700 mm. The adjuster functions as a mechanical stop to decelerate the travel end and does not hold the load without live air pressure.
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