Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-100S 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 SAIJ125AX260-100S
The AirTAC SAIJ125X260-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 260 mm stroke by up to 100 mm, creating a highly flexible 160-260 mm usable travel window. It delivers 6136 N of push force at 0.5 MPa, scaling up to 11045 N at 0.9 MPa, making it well-suited for heavy-duty positioning tasks.
This specific configuration includes a SUS420J2 stainless steel rod for improved corrosion resistance and a built-in magnet (-S) for use with AirTAC CMSE reed or DMSE solid-state sensors. The extruded aluminum barrel features sensor grooves on both sides, and the adjustable stopper acts purely as a travel end-deceleration mechanism, not a load lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-100S |
|---|---|
| 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 SAIJ125AX260-100S
| 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 SAIJ125AX260-100S Is Used
Product Changeover
Dial in the exact end-position for different package lengths on a packaging line using the 160-260 mm travel window without changing out the cylinder.
Machine Setup
Fine-tune the final retract position during commissioning to perfectly time a heavy 6136 N press or clamping operation.
Variable End Stops
Adjust the stroke dynamically for multi-format assembly stations where the rear stopper replaces hard mechanical shims.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-100S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3927 N at 0.5 MPa) lacks the thrust for heavier fixtures, but a 160 mm bore (10053 N at 0.5 MPa) would be excessive overkill. The 100 mm adjustment range is ideal for machinery that frequently handles varying product sizes, allowing you to fine-tune the end position during changeover without physically swapping the cylinder or adding external stops.
When matching ISO 15552 dimensions for a retrofit, verify the 260 mm stroke, 100 mm adjustment window, PT tapered port threads, and the -S magnet requirement. Because the total stroke here is 260 mm, ensure adequate side-load support by using an external guide rail to prevent binding. Remember that the rear adjuster only sets the travel end; for load-holding without live air pressure, select an SAIL air-released lock, a BSAI clamp-lock, or an external rod lock.
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 SAIJ125AX260-100S FAQ
At a 0.5 MPa operating pressure, 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 rear adjusting screw acts as a mechanical stopper that allows you to shorten the effective travel from the nominal 260 mm down to as little as 160 mm. This creates a 160-260 mm usable window, but it only decelerates the travel end; it does not lock the load without continuous air pressure.
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