Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 800mm 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
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-20
The AirTAC SAIJ125X800-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 780-800mm usable travel window from its 800mm nominal stroke. Delivering 6136N push and 5734N pull force at 0.5MPa, it is built for heavy-duty positioning. The extruded aluminum barrel includes sensor grooves on both sides for straightforward switch placement.
This model uses a 32mm carbon steel rod with an M27x2 thread and a PT G1/2 port. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end-position during commissioning or product changeover without swapping the cylinder. It supports speeds of 30-500mm/s and offers variable air cushions at both ends to manage kinetic energy.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 800 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 SAIJ125X800-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SAIJ125X800-20 Is Used
Machine Setup Calibration
Dial in the exact retract end-position during initial commissioning or product changeover without machining new spacer blocks.
Large Package Diverter
Adjust the 780-800mm travel window on-site to accommodate varying package sizes on a heavy-duty material handling line.
Heavy Press Positioning
Leverage 6136N of thrust at 0.5MPa to move large platens into their starting position while fine-tuning the final stop point.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-20 the Right Cylinder?
Choose this 125mm bore when a 100mm bore (offering 3927N push at 0.5MPa) lacks the necessary thrust for moving heavy jigs or large format materials. The adjustable stroke is ideal for applications requiring precise end-stop calibration during machine setup, providing a distinct advantage over a fixed-stroke SAI cylinder. Because the nominal stroke is 800mm, an external guide rail is strongly recommended to prevent excessive side-loading on the extended 32mm rod.
To match this ISO 15552 interchangeable cylinder, specify the 125mm bore, 800mm stroke, 20mm adjustment range, PT G1/2 port, and the required mounting accessory from the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2. Note that the rear adjuster and air cushions decelerate the load but do not hold it without live air; for fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ125X800-20 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.9MPa, the push force increases to 11045N.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective travel from 800mm down to 780mm. This provides a 780-800mm adjustable window for fine-tuning the end position without changing the cylinder.
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 SAIJ125X800-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.