Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 220mm 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
- Stroke220 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-50
The AirTAC SAIJ125X220-50 is a double-acting profile cylinder that adds a rear mechanical stopper to the standard ISO 15552 dimensional interface. With a nominal 220 mm stroke and a 50 mm adjustment range, you can dial the effective travel back to anywhere between 170 and 220 mm. This on-machine tuning eliminates the need to swap hardware when finalizing end positions.
Featuring a 125 mm bore, it delivers 6136 N of pull force at 0.5 MPa and reaches a maximum of 1251 kgf at 1.0 MPa. The extruded aluminum barrel includes sensor grooves on both sides for CMSE and DMSE switches, while the carbon steel rod and PT G1/2 tapered port handle heavy-duty flow requirements.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 220 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 SAIJ125X220-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×220 | 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 SAIJ125X220-50 Is Used
Variable End-Stop Tuning
Dial in the retract position from 170 to 220 mm during machine setup to accommodate different material thicknesses without changing out the cylinder.
Heavy Forming Press
Leverage the 1251 kgf maximum output force for high-resistance pressing operations while using the rear screw to set precise bottoming depth.
Product Size Changeover
Quickly adjust the travel window on automated packaging equipment when switching to a new product format, reducing line downtime.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-50 the Right Cylinder?
Selecting this 125 mm bore over a smaller 100 mm option steps the thrust up significantly from 3681 N to 6136 N of pull force at 0.5 MPa, which is critical for moving heavy jigs or forming loads. You would choose the SAIJ adjustable-stroke variant over a fixed SAI cylinder when you need to accommodate product size changeovers on a packaging line or fine-tune the retract end position during machine commissioning without adding external stopper blocks.
The rear adjuster acts purely as a travel stop and does not lock the load; for true load-holding without live air pressure, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder. The mounting footprint uses the reduced SAIJ set of Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 220 mm stroke is relatively short for this bore, side-load stress is minimal, but an external guide is still recommended for heavy lateral loads.
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 SAIJ125X220-50 FAQ
The rear of the cylinder features an external adjusting screw that acts as a mechanical stopper. It allows you to shorten the effective stroke by up to 50 mm, providing a usable travel window of 170 to 220 mm without replacing the cylinder.
At a standard operating pressure of 0.5 MPa, it provides 6136 N of pull force and 8590 N of push force. At the maximum rated pressure of 1.0 MPa, it can deliver up to 1251 kgf.
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 SAIJ125X220-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.