Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-100 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 SAIJ125X220-100
The AirTAC SAIJ125X220-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel. With a 220 mm nominal stroke and a 100 mm adjustment range, it provides a usable travel window of 120 to 220 mm. This bore generates 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it suited for heavy payload positioning.
The rear adjuster acts as a mechanical stop to fine-tune the retract end position during commissioning or product changeover without adding external stops. It is not a locking device, so live air is required to hold the load. This extruded aluminum barrel includes sensor grooves on both sides, and its 32 mm carbon steel rod with an M27x2 thread handles substantial side loads, though an external guide is still recommended for optimal stability.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-100 |
|---|---|
| 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 SAIJ125X220-100
| 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 SAIJ125X220-100 Is Used
Variable End-Stop Machining
Dial in the retract position precisely between 120 and 220 mm to accommodate different part lengths on a single machining fixture without swapping cylinders.
Product Changeover Diverter
Adjust the stroke on the fly during line format changes to divert varying package sizes accurately down the correct conveyor lane.
Machine Setup Fine-Tuning
Use the 100 mm rear adjustment screw to set the exact end-of-travel position during initial commissioning, avoiding the need for custom machined spacers.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-100 the Right Cylinder?
Choose this 125 mm bore when 80 mm (yielding 2513 N at 0.5 MPa) is insufficient, or step down if 100 mm (3927 N) provides enough force. The adjustable stroke is selected over a fixed SAI cylinder when a machine requires variable end-stops to accommodate multiple product sizes on the same line. For a true ISO 15552 replacement match, verify the 220 mm stroke, 100 mm adjustment, PT tapered port, and the required mounting accessory from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the nominal stroke is under 300 mm, side-load concerns are moderate, but the heavy moving mass still warrants checking your guide rails.
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 SAIJ125X220-100 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum operating pressure of 1.0 MPa, it can deliver up to 1251 kgf.
The rear adjuster functions as a mechanical stop that shortens the 220 mm nominal stroke by up to 100 mm, creating a usable travel window of 120 to 220 mm. It requires live air pressure to function and does not lock or hold the load pneumatically.
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