Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-50 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 SAIJ125AX260-50
The AirTAC SAIJ125X260-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 210 to 260 mm usable travel window. It delivers 6136 Newtons of push force at 0.5 MPa, making it a robust choice for heavy-duty actuation. The standard extruded aluminum barrel includes sensor grooves on both sides, allowing direct mounting of CMSE reed or DMSE electronic sensors if a magnet is specified later.
This variant features a SUS420J2 stainless steel rod (material code A) and PT tapered port threads. The rear adjustment screw allows you to fine-tune the retract end position during commissioning or product changeovers without adding external stops. Remember that this adjuster acts purely as a travel stop and does not hold the load without live air pressure; for true locking needs, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-50 |
|---|---|
| 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 SAIJ125AX260-50
| 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 SAIJ125AX260-50 Is Used
Variable End-Stop Forming
Dial in the exact 210 to 260 mm retract distance for multi-size metal forming operations without physically swapping cylinders between production runs.
Product Changeover Diverters
Quickly reposition the diverting end-stop on packaging lines to handle different carton lengths, using the rear screw to adapt the stroke on the fly.
Machine Setup Calibration
Fine-tune the end-of-travel position during initial commissioning to perfectly time heavy-duty assembly presses, avoiding the need for machined spacer blocks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-50 the Right Cylinder?
Select this 125 mm bore cylinder when your application requires substantial force—stepping down to a 100 mm bore reduces thrust to 3927 N at 0.5 MPa, while moving up to a 160 mm bore yields 10053 N. The 50 mm adjustment range is ideal for machinery requiring variable end-stops across different product sizes. Because the 260 mm stroke exceeds 300 mm is false here, but always ensure proper guiding for heavy loads to prevent excessive side-loading on the 32 mm rod.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 260 mm stroke, 50 mm adjustment, PT G1/2 port, and required mounting accessory. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Operating speed for this bore size is 30-500 mm/s.
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 SAIJ125AX260-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can deliver up to 8590 N push force at 0.7 MPa.
The rear adjuster screw lets you trim the effective travel back by up to 50 mm from the 260 mm nominal stroke, providing a 210 to 260 mm usable window. It functions as a mechanical stop for end-position tuning and does not lock the load without continuous air pressure.
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