Airtac SAIJ125 Adjustable Cylinder SAIJ125AX475-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX475-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX475-30S
The AirTAC SAIJ125X475-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 475 mm travel by up to 30 mm for a precise 445-475 mm usable window. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads without needing external stops. This unit features a SUS420J2 stainless steel rod for superior corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors.
Because the adjuster acts purely as a mechanical stop and the standard air cushions handle end-of-stroke deceleration, this cylinder cannot hold a load without live air pressure. For position-holding requirements, an external rod lock or a related SAIL pneumatic locking cylinder is required. The mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 attachments.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX475-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX475-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 475 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 SAIJ125AX475-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×475 | 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 SAIJ125AX475-30S Is Used
Product Changeovers
Quickly modify the 445-475 mm stroke window to accommodate different packaging sizes on the same line without swapping the cylinder.
Machine Setup
Fine-tune the exact retract end-position during commissioning using the rear screw, ensuring perfect alignment of heavy mechanical assemblies.
Variable End Stops
Provide adaptable physical stops for automated material handling equipment that requires frequent adjustments to its travel limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX475-30S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (providing 3927 N push at 0.5 MPa) is insufficient, but a 160 mm bore (10053 N) is oversized. The adjustable 445-475 mm travel is selected over a fixed SAI cylinder when machinery requires variable end-stops for rapid product changeovers or fine commissioning tweaks without hardware swaps. To match this ISO 15552 replacement exactly, specify the 125 mm bore, 475 mm stroke, 30 mm adjustment, PT tapered ports, and the -S magnet.
With a 475 mm stroke exceeding the 300 mm threshold, the 32 mm rod diameter and M27x2 thread provide substantial rigidity, but an external guide is strongly recommended to prevent excessive side-loading on the piston. Operating speed ranges from 30-500 mm/s.
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 SAIJ125AX475-30S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.9 MPa.
The rear adjuster acts as a mechanical stop that trims the nominal 475 mm stroke back by up to 30 mm, creating a 445-475 mm usable travel window. It sets the end position but does not lock the load without live air pressure.
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