Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-40S 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 SAIJ125AX260-40S
The AirTAC SAIJ125X260-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 220-260mm usable travel window, letting you dial back the 260mm nominal stroke by up to 40mm during commissioning. It delivers 6136N of push force at 0.5MPa and uses a SUS420J2 stainless steel rod for superior corrosion resistance.
Equipped with a magnet for position sensing, this unit integrates seamlessly with AirTAC CMSE reed and DMSE solid-state sensors in its dual-side barrel grooves. The PT tapered port (G1/2) and 32mm rod thread handle high flow and heavy loads. The rear adjuster acts purely as a travel stop, meaning the load is never held without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-40S |
|---|---|
| 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 SAIJ125AX260-40S
| 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 SAIJ125AX260-40S Is Used
Machine Changeover
Dial in the 220-260mm travel window during product size changes to set precise retract stops without machining new hard stops.
Heavy Fixture Clamping
Leverage 6136N of thrust at 0.5MPa to secure heavy workpieces, using the rear screw to fine-tune the clamp position.
Commissioning Tuning
Trim up to 40mm of stroke on-site to perfect end-of-stroke positioning and optimize cycle timing before production.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-40S the Right Cylinder?
Choose this 125mm bore when a 100mm bore (offering 3927N at 0.5MPa) lacks the thrust for your heavier fixtures, but a 160mm bore (10053N at 0.5MPa) is physically oversized. The 40mm adjustment range is ideal for product changeovers, allowing you to set new retract endpoints without swapping the cylinder or adding external stops. For load-holding without continuous air pressure, select a SAIL or BSAI cylinder instead, as the SAIJ adjuster is not a lock.
To replace an ISO 15552 cylinder, match the 125mm bore, 260mm stroke, 40mm adjustment, PT G1/2 port, and the -S magnet. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is 260mm, ensure an external guide supports the load to prevent excessive side-loading on the 32mm rod.
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 SAIJ125AX260-40S FAQ
At 0.5MPa it provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9MPa.
A rear stopper screw lets you shorten the 260mm nominal stroke by up to 40mm, creating a 220-260mm adjustable travel window. It functions as an end-position stop, not a load-holding lock.
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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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