Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 260mm 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
- Stroke260 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30S
The AirTAC SAIJ125X260-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end-of-travel position. It provides a usable stroke window of 230 to 260 mm, letting you dial back the travel by up to 30 mm during commissioning without adding external stops. Built to deliver 6136 N of push force at 0.5 MPa, it is designed for heavy-duty positioning tasks.
This variant includes a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance and ships with a piston magnet (-S) for use with AirTAC CMSE reed and DMSE solid-state sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the standard PT tapered port is G1/2. It supports a speed range of 30-500 mm/s and uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 260 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 SAIJ125AX260-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×260 | 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 SAIJ125AX260-30S Is Used
Product Changeover Tuning
Quickly shift the retract end-position by up to 30 mm when switching a packaging line to a different carton size, using the rear stopper instead of swapping cylinders.
Heavy Press Positioning
Leverage 6136 N of push force at 0.5 MPa to securely seat heavy components, dialing back the final 0-30 mm of travel to achieve exact contact depth.
Machine Setup Calibration
Fine-tune the end-stop during initial machine commissioning to prevent mechanical crashes, using the rear adjuster to safely set the 230-260 mm travel window.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30S the Right Cylinder?
Choose this 125 mm bore cylinder when a 100 mm bore (providing 3927 N push at 0.5 MPa) is insufficient for your load, but you want to avoid jumping to a 160 mm frame (10053 N at 0.5 MPa) which adds significant bulk. The adjustable rear stopper is ideal for product changeovers on a packaging line where exact end positions vary by a few centimeters, saving you from swapping out a fixed-stroke SAI cylinder. Because the total stroke is 260 mm, ensure your setup handles side loads properly; long unsupported strokes still require an external guide.
When specifying a replacement, match the 125 mm bore, 260 mm nominal stroke, 30 mm adjustment range, PT G1/2 port, and the -S magnet requirement. Remember that the rear adjuster is a travel stop, not a lock. If your application requires dead-stop load holding without live air pressure, the SAIJ cannot hold the load; you must use an SAIL air-released lock, a BSAI clamp-lock, or an external pilot-operated check valve 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 SAIJ125AX260-30S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N. The operational speed range is 30-500 mm/s.
The rear adjuster acts as an external stopper that lets you shorten the effective stroke from 260 mm down to as little as 230 mm. This creates a 230-260 mm travel window for fine-tuning end positions at commissioning without changing the cylinder itself.
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