Airtac SAIJ125 Adjustable Cylinder SAIJ125X65-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X65-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 65mm 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
- Stroke65 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X65-30
The AirTAC SAIJ125X65-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a 32mm carbon steel piston rod with an M27x2 thread and PT tapered ports. By turning the rear screw, you can trim the 65mm nominal stroke back by up to 30mm, yielding a precise 35-65mm usable travel window without swapping hardware.
This adjuster functions strictly as a mechanical stop for end-position tuning during commissioning, not as a load-holding lock. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to drop in CMSE or DMSE switches if a magnet is specified later. It supports a 30-500mm/s speed range and uses the standard SAIJ mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X65-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X65-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 65 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 SAIJ125X65-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×65 | 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 SAIJ125X65-30 Is Used
Product Changeovers
Dial in the 35-65mm travel window during format changes to accommodate different package sizes without replacing the cylinder.
End-Stop Tuning
Fine-tune the retract position at machine commissioning using the rear screw to perfect the mechanical stop for heavy 6136N operations.
Heavy Assembly Pressing
Leverage the robust 32mm carbon steel rod and high thrust for pressing tasks where exact end-positioning prevents component damage.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X65-30 the Right Cylinder?
Select this 125mm bore when an 80mm cylinder lacks thrust, as stepping up from the 80mm bore increases push force at 0.5 MPa from 2513N to 6136N. The 30mm adjustment range is ideal for product-size changeovers on a line, letting operators dial in the exact 35-65mm end-stop mechanically rather than adding external stops or buying a fixed-stroke SAI cylinder. Because the rear adjuster only sets the travel limit, applications requiring true load-holding without live air pressure must use an external rod lock or pilot-operated check valve, or switch to a SAIL or BSAI model. For a direct ISO 15552 replacement, match the 125mm bore, 65mm stroke, 30mm adjustment, PT ports, and the desired mounting style.
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 SAIJ125X65-30 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N 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 trims the 65mm nominal stroke by up to 30mm, creating a usable travel window of 35-65mm. It sets the end position but does not lock or hold the load without continuous air pressure.
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