Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75S
The AirTAC SAIJ125X230-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 230 mm travel by up to 75 mm. This creates a highly flexible 155-230 mm usable stroke window, letting you fine-tune end positions at commissioning without swapping out the physical cylinder or adding bulky external stops. It delivers robust thrust, pushing with 6136 N and pulling with 5734 N at 0.5 MPa operating pressure.
Featuring a built-in magnet for position sensing, this unit works seamlessly with AirTAC CMSE reed switches and DMSE electronic solid-state sensors mounted into the dual-side barrel grooves. The extruded aluminum profile barrel utilizes a G1/2 port and a 32 mm carbon steel rod with an M27x2 thread, providing a rigid, high-capacity interface designed to handle substantial loads while maintaining standard ISO 15552 mounting dimensions.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAIJ125X230-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SAIJ125X230-75S Is Used
Variable End-Stop Tuning
Dial in the exact 155 to 230 mm travel distance required during machine commissioning, avoiding the need to physically swap cylinders for minor position corrections.
Product-Size Changeovers
Quickly adapt automated lines to different product dimensions by adjusting the rear stopper screw, reducing downtime when switching between part variants.
High-Force Positioning
Leverage 6136 N of push force at 0.5 MPa to move heavy assemblies into exact final positions, using the 75 mm adjustment window to fine-tune the contact point.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75S the Right Cylinder?
Choose this 125 mm bore when you need significantly more force than an 80 mm bore provides (2513 N push at 0.5 MPa), but less than the massive output of a 160 mm bore (10053 N). The adjustable stroke is ideal for machine setups requiring variable end-stops or frequent product-size changeovers, whereas a fixed-stroke SAI cylinder is better for dedicated, single-purpose tasks. Keep in mind the rear adjuster acts purely as a travel stop and does not hold the load without live air pressure; for true pneumatic locking without pressure, consider the SAIL or BSAI series.
To replace this cylinder using ISO 15552 interchangeability, match the 125 mm bore, 230 mm stroke, 75 mm adjustment range, PT tapered port thread, and the -S magnet option. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets (omitting FB, CA, CB, and CR). Because the stroke exceeds 300 mm, note that an external guide is recommended to prevent excessive rod side-loading, though this 230 mm travel sits just under that threshold. Operating speed is rated for 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 SAIJ125X230-75S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the nominal 230 mm down to 155 mm, providing a 75 mm tuning window without changing the cylinder itself.
It provides 6136 N of push force and 5734 N of pull force at 0.5 MPa, scaling up to 11045 N push at 0.9 MPa.
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