Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-100 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 SAIJ125X260-100
The AirTAC SAIJ125X260-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to fine-tune the effective travel anywhere within a 160 to 260 mm window. This built-in adjustability is ideal for product changeovers, letting you shift the end-stop at commissioning without physically swapping the actuator or adding external stops. Delivering 6136 N of push force at 0.5 MPa, it handles heavy positioning tasks with precision.
This 125 mm bore actuator uses a G1/2 port and a 32 mm carbon steel rod with an M27x2 thread, providing a robust interface that tolerates higher side loads than smaller bores. It relies on variable air cushions at both ends to decelerate the load smoothly, but because the rear screw is strictly a travel stop and not a lock, it will not hold a load without live air pressure. For position-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-100 |
|---|---|
| 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 SAIJ125X260-100
| 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 SAIJ125X260-100 Is Used
Variable End-Stop Positioning
Dial in the exact retract distance between 160 and 260 mm during machine setup to accommodate different material thicknesses without machining new hard stops.
Product Size Changeover
Quickly adjust the stroke on packaging lines when switching between product sizes, using the rear screw to set the new final position rapidly.
Heavy Clamping Fixtures
Leverage the 6136 N push force at 0.5 MPa to secure heavy workpieces, tuning the clamping travel window to prevent over-travel.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-100 the Right Cylinder?
Choose this adjustable-stroke model when your fixture requires variable end-position tuning across a 160 to 260 mm range, whereas a fixed-stroke SAI cylinder locks you into a single 260 mm endpoint. If your application demands less thrust, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa; conversely, a 160 mm bore provides 10053 N for heavier loads. When replacing an ISO 15552 cylinder, match the 125 mm bore, 260 mm stroke, 100 mm adjustment, PT tapered port, and mounting choice from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Because the 260 mm stroke exceeds the 300 mm threshold requiring external guidance, side-load is manageable here, but long unsupported strokes still necessitate an external guide to prevent rod binding. The standard carbon steel rod and NBR/TPU seals suit general industrial use, while optional Viton H seals handle higher ambient temperatures.
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 SAIJ125X260-100 FAQ
The rear adjuster acts as an external stopper that lets you shorten the effective stroke by up to 100 mm, providing a usable travel window of 160 to 260 mm. It sets the end position but does not lock the load without live air pressure.
At 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
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