Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-50S 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 SAIJ125AX65-50S
The AirTAC SAIJ125X65-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 15 to 65 mm. It integrates a 32 mm SUS420J2 stainless steel rod and PT tapered ports, delivering 6136 N of pull force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet supports CMSE reed and DMSE electronic switches for precise position detection.
By turning the external rear stopper screw, you can fine-tune the retract end-position during commissioning or product changeover without adding external stops. The adjuster acts purely as a travel stop and deceleration aid, meaning it will not hold a load without live air pressure. For position-holding requirements without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-50S |
|---|---|
| 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 SAIJ125AX65-50S
| 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 SAIJ125AX65-50S Is Used
Product Changeover
Dial in the exact retract distance from 15 to 65 mm during format size changes on packaging lines without swapping out the entire actuator.
Machine Setup
Fine-tune the end-stop during initial commissioning to perfect the seating force of heavy 6136 N assemblies using the rear adjustment screw.
Variable End Stops
Establish precise mechanical limits for heavy-duty material handling equipment where the exact end position varies between production runs.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-50S the Right Cylinder?
Choose this 125 mm bore model when an application requires heavy thrust, as it provides 6136 N pull and 8590 N push at 0.7 MPa. If the force requirement is lower, stepping down to a 100 mm bore yields 3681 N pull at 0.5 MPa, whereas moving up to a 160 mm bore offers 9425 N pull. The adjustable stroke is ideal for machines needing variable end-stops on the fly. When ordering an ISO 15552 replacement, verify the 65 mm nominal stroke, 50 mm adjustment range, PT port threads, SUS420J2 rod, and the -S magnet option.
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 SAIJ125AX65-50S FAQ
At 0.5 MPa, it provides 6136 N of pull force and 8590 N of push force. At the maximum operating pressure of 1.0 MPa, the push force reaches 11045 N.
The rear adjuster screw allows you to trim the 65 mm nominal stroke back by up to 50 mm, creating a usable travel window of 15 to 65 mm to fine-tune the end position.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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