Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-100S
The AirTAC SAIJ125X500-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical adjuster. It delivers substantial thrust, pushing 8590N at 0.7 MPa, making it suitable for heavy-duty automation. The integrated -S magnet allows seamless position sensing using AirTAC CMSE reed and DMSE solid-state switches mounted in the dual-side sensor grooves.
This specific SKU provides a nominal 500 mm stroke that can be fine-tuned backward by up to 100 mm, creating a 400-500 mm usable travel window. This built-in adjustability allows operators to dial in exact end-of-stroke positions during commissioning or product changeovers without physically swapping the cylinder or adding external stopper blocks. It features a carbon steel piston rod and PT tapered port threads.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAIJ125X500-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SAIJ125X500-100S Is Used
Product Changeover
Quickly reconfigure the end-stop position on a packaging line when switching to a different carton size, utilizing the 400-500 mm travel window.
Assembly Press Tuning
Fine-tune the precise bottoming position of a heavy press during machine setup without machining new spacer blocks.
Variable Diverter
Adjust the retraction distance of a heavy-duty diverter arm to accommodate varying pallet dimensions on a conveyor.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-100S the Right Cylinder?
Selecting this 125 mm bore model makes sense when your application requires the 8590N push force at 0.7 MPa, stepping up from a 100 mm bore (5497N) to handle much heavier loads. The adjustable stroke is chosen over a fixed-stroke SAI when a machine requires variable end-stops for different product sizes. For any stroke length of 500 mm, the 32 mm diameter carbon steel rod provides robust support, but an external guide is still recommended to prevent side-loading damage on long unsupported travels.
This unit is dimensionally interchangeable per ISO 15552 mounting interfaces. It uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Note that the rear adjuster acts only as a travel stop and the air cushions only decelerate the load; neither will hold the load without live air pressure. For true fail-safe load holding, consider an SAIL or BSAI cylinder instead.
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 SAIJ125X500-100S FAQ
This 125 mm bore cylinder generates a push force of 8590N at 0.7 MPa and 11045N at 0.9 MPa. The pull force is 5734N at 0.7 MPa.
The rear adjuster screw lets you shorten the 500 mm nominal stroke by up to 100 mm, providing a usable travel window of 400-500 mm. This stopper only sets the end position; it does not lock the load without continuous air pressure.
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Standard models usually ship in 3-4 days.
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