Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30 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 SAIJ125X260-30
The AirTAC SAIJ125X260-30 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical adjuster that allows you to trim the effective travel down by up to 30 mm. This specific SKU provides a usable stroke window of 230 to 260 mm, enabling precise end-position tuning at commissioning without swapping out the barrel or adding external stops. It delivers a robust 6136 N pull force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
Unlike a fixed-stroke SAI unit, this adjustable variant lets you dial in the exact retract distance during product changeovers. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches, though this particular configuration omits the internal magnet. The rear adjuster acts purely as a travel stop to set the end position and must not be confused with a lock, as it cannot hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30 |
|---|---|
| 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 SAIJ125X260-30
| 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 SAIJ125X260-30 Is Used
Machine Changeover Setup
Quickly fine-tune the retract end-position by up to 30 mm when switching a production line between product sizes, eliminating the need to physically swap cylinders.
Heavy Press Positioning
Leverage the 6136 N pull force at 0.5 MPa to reliably move and position heavy fixtures, using the adjustable stop to dial in the exact clamping distance.
Variable End-Stop Conveying
Act as a robust diverter or gate mechanism where the extended reach needs occasional adjustment within the 230 to 260 mm travel window during line reconfiguration.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30 the Right Cylinder?
Select this 125 mm bore cylinder when your application requires high thrust combined with variable end-stop positioning. If you need less force, stepping down to an 80 mm bore yields 2268 N of pull at 0.5 MPa, whereas moving up to a 160 mm bore provides 9425 N. The SAIJ125X260-30 uses a PT tapered port and carbon steel rod, and its 260 mm stroke is well within standard limits, meaning no external side-load guide is strictly mandated for the rod length itself, though heavy loads still benefit from external guidance.
Because the rear adjuster only acts as a mechanical stop and the air cushions manage deceleration, this cylinder will not hold its position without continuous air pressure. For true load-holding requirements without live pressure, consider the SAIL pneumatic lock series or an external rod lock. This model shares the exact ISO 15552 mounting interface dimensions of comparable profile cylinders, utilizing a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125X260-30 FAQ
It features a rear adjusting screw that acts as a mechanical stop, allowing you to shorten the nominal 260 mm stroke by up to 30 mm. This creates a usable travel window of 230 to 260 mm, which can be fine-tuned during commissioning without changing the cylinder itself.
At 0.5 MPa operating pressure, it provides 6136 N of pull force and 8590 N of push force. The maximum operating pressure is 1.0 MPa, where the push force reaches 11045 N.
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