Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 600mm 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
- Stroke600 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-50S
The AirTAC SAIJ125X600-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a substantial 6136 Newtons of pull force at 0.5 MPa, making it suitable for heavy-duty positioning. The integrated -S magnet enables direct mounting of CMSE reed and DMSE electronic sensors along the extruded aluminum barrel grooves.
This specific SKU features a 600 mm nominal stroke that can be fine-tuned backward by up to 50 mm, creating a 550-600 mm usable travel window. It utilizes a PT tapered port thread, a 32 mm SUS420J2 stainless steel rod, and operates at a controlled speed range of 30-500 mm/s. The rear screw mechanism acts purely as a mechanical stop to dial in the end position during commissioning without swapping the cylinder.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 600 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 SAIJ125AX600-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×600 | 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 SAIJ125AX600-50S Is Used
Variable End-Stop Positioning
Dial in the 550-600 mm travel window during machine setup to accommodate varying part dimensions without changing out the entire actuator.
Product Size Changeover
Quickly adjust the rear stopper on a packaging line to handle different box sizes, ensuring precise 6136 N push positioning at 0.5 MPa.
Heavy-Duty Assembly Press
Leverage the 32 mm SUS420J2 stainless rod and PT tapered ports to reliably shift heavy fixtures into place before applying final clamping force.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-50S the Right Cylinder?
Choose this adjustable model when your assembly requires precise end-position tuning during product changeovers, avoiding the need to bolt on external stops or swap out a fixed-stroke SAI cylinder. If your application demands less force, stepping down to an 80 mm bore yields 2268 N of pull at 0.5 MPa; conversely, moving to a 160 mm bore provides 9425 N. For this 600 mm stroke, an external guide is strongly recommended to manage side loads on the 32 mm rod.
Because the rear adjuster and the variable air cushions only decelerate and set the travel end, this cylinder cannot hold a load without live air pressure. For true fail-safe load holding, consider the SAIL (pneumatic lock) or BSAI (clamp-lock) series. This SAIJ unit is dimensionally interchangeable per ISO 15552 and uses the reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX600-50S FAQ
At 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. If pressure is increased to 0.7 MPa, the push force reaches 8590 N.
The rear adjuster screw allows you to shorten the 600 mm nominal stroke by up to 50 mm, giving a usable travel window of 550-600 mm. It functions as a mechanical stop for end-position tuning and does not lock the load without continuous air pressure.
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