Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-20S 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 SAIJ125AX260-20S
The AirTAC SAIJ125X260-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 240 to 260 mm, allowing you to dial back the nominal 260 mm stroke by up to 20 mm during commissioning without adding external stops. Built with a SUS420J2 stainless steel rod and a PT tapered port, it delivers 6136 N of pull force at 0.5 MPa and safely handles speeds of 30-500 mm/s.
This model includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors, which seat neatly into the extruded aluminum barrel's dual sensor grooves. The rear adjustment screw acts purely as a travel stop combined with variable air cushions at both ends to decelerate the load; it is not a lock, so you must maintain live air to hold a position. It uses the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and is dimensionally interchangeable per ISO 15552.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-20S |
|---|---|
| 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 SAIJ125AX260-20S
| 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 SAIJ125AX260-20S Is Used
Product Changeover Tuning
Dial in the 240-260 mm stroke window during format changes on a packaging line without physically swapping cylinders or bolting on external stops.
Heavy Pressing Operations
Leverage 8590 N of push force at 0.7 MPa to securely seat components, using the rear stop to precisely limit the pressing depth.
End-Stop Calibration
Fine-tune the retract end-position at machine commissioning, using the 20 mm adjuster to perfectly time the 32 mm rod retraction.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-20S the Right Cylinder?
Choose this 125 mm bore actuator when your application requires heavy push forces up to 6136 N at 0.5 MPa (or 8590 N at 0.7 MPa) and on-the-fly end-position tuning. If your force requirements are lower, stepping down to an 80 mm bore yields 2268 N of pull force at 0.5 MPa, whereas moving up to a 160 mm bore provides 9425 N. The 20 mm adjustment range is ideal for product changeovers where the exact end-stop varies slightly, saving you from swapping out a fixed-stroke SAI cylinder.
To replace this ISO 15552 cylinder accurately, match the 125 mm bore, 260 mm nominal stroke, 20 mm adjustment range, PT G1/2 port, and the -S magnet option. Because the total stroke is 260 mm, ensure adequate external guidance to prevent side-loading on the 32 mm rod, as the adjuster only manages end-of-travel deceleration. For applications requiring true load-holding without live air pressure, consider the SAIL or BSAI series 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 SAIJ125AX260-20S FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. If you increase the operating pressure to 0.7 MPa, the push force rises to 8590 N.
The rear adjuster screw lets you shorten the effective travel from the nominal 260 mm down to 240 mm. It acts as a mechanical stop to fine-tune the end position, but it does not lock the load without continuous air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.