Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-10 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 SAIJ125X75-10
The AirTAC SAIJ125X75-10 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 6136N push force at 0.5MPa and incorporates a tapered PT G1/2 port. The integrated rear adjusting screw allows you to trim the effective stroke within a 65 to 75mm usable travel window, perfect for fine-tuning retract positions without adding external stops.
This 125mm bore actuator utilizes a 32mm carbon steel rod with an M27x2 thread, providing substantial rigidity against side loads. It features variable air cushions at both ends to decelerate heavy masses smoothly. The adjuster acts solely as a travel stop and does not lock the load without live air pressure; for position holding, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-10 |
|---|---|
| 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 SAIJ125X75-10
| 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 SAIJ125X75-10 Is Used
Machine Changeover Setup
Dial in the 65-75mm travel window during product size changes to set new retract stops without physically replacing the cylinder on the line.
Heavy Press Positioning
Leverage the 6136N thrust at 0.5MPa to move heavy tooling, using the rear adjuster to guarantee the exact final position without over-travel.
Assembly Station Tuning
Fine-tune the end-of-stroke position during initial commissioning to perfect part insertion forces, avoiding the need for secondary external stoppers.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-10 the Right Cylinder?
Choose this 125mm bore model when your application requires higher thrust than the 80mm variant (which yields 2513N at 0.5MPa) but less than the massive 160mm bore (10053N at 0.5MPa). The 10mm adjustable stroke window is ideal for machine changeovers where exact end-position tuning is necessary at commissioning, avoiding the need to swap out a fixed-stroke SAI cylinder. To match this ISO 15552 replacement, specify: 125mm bore, 75mm stroke, 10mm adjustment, PT G1/2 port, and standard carbon steel rod.
Mounting options are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because the nominal stroke is under 300mm, external guide requirements are less critical than on long-stroke units, but the heavy moving mass still necessitates careful load alignment.
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 SAIJ125X75-10 FAQ
It features a rear adjusting screw that lets you shorten the nominal 75mm stroke by up to 10mm, providing a usable travel window of 65 to 75mm. This allows precise end-position tuning at commissioning without swapping the cylinder.
At 0.5MPa, it provides a push force of 6136N and a pull force of 5734N. At 0.7MPa, the push force increases to 8590N. The cylinder operates at speeds of 30-500mm/s.
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