Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-30S 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 SAIJ125AX700-30S
The AirTAC SAIJ125X700-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6133N push force at 0.5 MPa, making it suited for heavy-duty positioning. By turning the external rear screw, you can trim the effective travel within a 670 to 700 mm window, allowing precise end-position tuning at commissioning without adding external stops.
This model features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches. It supports a speed range of 30-500 mm/s and uses adjustable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-30S |
|---|---|
| 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 SAIJ125AX700-30S
| 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 SAIJ125AX700-30S Is Used
Machine Setup & Changeover
Fine-tune the 670-700 mm retract position during product size changeovers, eliminating the need to physically swap cylinders or bolt on external stoppers.
Variable End-Stop Positioning
Dial in the exact end-position at commissioning using the rear adjuster, perfect for applications requiring precise stroke limits without mechanical rework.
Heavy-Duty Assembly Lines
Leverage the 6133N push force at 0.5 MPa to move substantial masses, relying on the adjustable air cushions to smoothly decelerate the load at both travel ends.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-30S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (providing 3927N push at 0.5 MPa) cannot generate the required force. The adjustable 670-700 mm travel window is ideal for product-size changeovers on a line, letting you fine-tune the retract end without swapping the cylinder. For a fixed end-stop, a standard SAI cylinder is simpler, but the SAIJ rear adjuster saves time during setup.
When ordering, specify the 125 mm bore, 700 mm stroke, 30 mm adjustment, PT port, and the -S magnet. Because the stroke is 700 mm, the 32 mm diameter rod will experience bending under heavy side loads; an external guide is recommended to prevent rod damage. The rear adjuster and air cushions act as travel stops and deceleration devices, not a lock. For load-holding without live air, select an SAIL or BSAI cylinder. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX700-30S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6133N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster acts as a mechanical stop that lets you shorten the 700 mm nominal stroke by up to 30 mm, creating a usable travel window of 670 to 700 mm. It only sets the travel end and does not hold the load without live air pressure.
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