Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-30S
The AirTAC SAIJ125X75-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 45-75mm usable travel window, allowing you to dial back the 75mm nominal stroke by up to 30mm during commissioning. Delivering 6136N of push force at 0.5MPa, it handles heavy positioning tasks with precision.
This unit features a SUS420J2 stainless steel rod for enhanced corrosion resistance and includes a built-in magnet for CMSE reed and DMSE electronic sensors. The extruded aluminum barrel integrates sensor grooves on both sides, and the rear adjuster acts purely as a travel stop, meaning it cannot hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAIJ125AX75-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SAIJ125AX75-30S Is Used
Product Changeover Tuning
Dial in the 45-75mm travel window on the fly during packaging line changeovers to accommodate different carton sizes without swapping hardware.
Heavy Press Positioning
Leverage the 6136N push force to move heavy materials into exact end-positions, using the rear screw to fine-tune the hard stop for precision assembly.
Machine Setup Calibration
Set precise retract endpoints during initial machine commissioning, using the 30mm adjustment range to find the perfect operating window before locking down.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-30S the Right Cylinder?
Choose this adjustable SAIJ model over a fixed-stroke SAI cylinder when your machine setup requires variable end-stops or frequent product-size changeovers, as it eliminates the need to physically swap cylinders or bolt on external stops. If your application demands less force, stepping down to a 100mm bore yields 3927N at 0.5MPa; conversely, a 160mm bore provides 10053N for heavier loads.
Because the stroke is under 300mm, side-load stress is reduced, though the substantial 32mm rod and M27x2 thread inherently handle high bending loads. To replace an ISO 15552 cylinder, match the 125mm bore, 75mm stroke, PT tapered port threads, the reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), and the -S magnet option. For load-holding without live pressure, select an SAIL or BSAI cylinder instead, as the rear adjuster here is not a lock.
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 SAIJ125AX75-30S FAQ
At 0.5MPa 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 0.7MPa.
The rear adjuster screw allows you to shorten the 75mm nominal stroke by up to 30mm, creating a 45-75mm usable travel window. It acts as a mechanical stop to fine-tune the end position without altering the cylinder itself.
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