Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 280mm 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
- Stroke280 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-100
The AirTAC SAIJ125X280-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136 N of push force at 0.5 MPa. By integrating a 100 mm adjustment screw, this unit creates a usable travel window between 180 and 280 mm. This allows precise end-position tuning during commissioning without the need to physically swap the cylinder or bolt on external stops.
Built with a carbon steel piston rod and PT threaded G1/2 ports, it handles heavy loads while operating at a controlled speed range of 30-500 mm/s. The extruded aluminum barrel features sensor grooves on both sides, and because no magnet is specified, position sensing would require adding a magnet (-S) to work with AirTAC CMSE or DMSE switches.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 280 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 SAIJ125X280-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×280 | 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 SAIJ125X280-100 Is Used
Variable End-Stop Positioning
Dial in the exact retraction point within the 180-280 mm window to accommodate different material thicknesses without changing out the entire actuator assembly.
Machine Setup Changeover
Quickly reconfigure production lines for new product dimensions by turning the rear adjuster screw, reducing downtime between manufacturing runs.
Heavy-Duty Forming Stop
Leverage the 6136 N push force to act as a robust mechanical stop for heavy workpieces, fine-tuning the forming depth during initial commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-100 the Right Cylinder?
Select this 125 mm bore when a machine requires substantial thrust—such as 6136 N push at 0.5 MPa—combined with variable end-stops for product changeovers. If your application demands less force, stepping down to a 100 mm bore yields 3927 N; stepping up to a 160 mm bore provides 10053 N. The 100 mm adjustment range is ideal for accommodating multiple product sizes on a single line, whereas a fixed-stroke SAI cylinder is better suited for dedicated, single-size processes.
As a dimensionally interchangeable ISO 15552 profile cylinder, it matches standard mounting footprints using the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounts, intentionally omitting FB, CA, CB, and CR options. Because the 280 mm stroke exceeds 300 mm is not met here, but for any unsupported load, external guiding is still recommended. Note that the rear adjuster acts strictly as a travel stop and does not hold the load without live air; for true pneumatic locking, consider the SAIL or BSAI series.
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 SAIJ125X280-100 FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 100 mm. This creates a usable travel window of 180 to 280 mm, letting you set the exact end position at commissioning without replacing the cylinder.
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.9 MPa.
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 SAIJ125X280-100
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.