Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75S 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 SAIJ125X220-75S
The AirTAC SAIJ125X220-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 145 to 220 mm. Featuring a 125 mm bore, it delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa. The carbon steel rod and M27x2 thread provide robust load handling for heavy-duty operations.
This model includes a magnetic piston (-S) for direct integration with AirTAC CMSE reed and DMSE electronic sensors. The rear adjuster acts purely as a mechanical stop to fine-tune the retract position, meaning it cannot hold a load without continuous live air pressure. For load-holding requirements, an external SAIL or BSAI locking cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75S |
|---|---|
| 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 SAIJ125X220-75S
| 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 SAIJ125X220-75S Is Used
Product Size Changeovers
Quickly dial in the 145-220 mm travel window during format changes on packaging lines without replacing hardware.
Heavy-Duty End Tuning
Leverage the 6136 N push force to securely press components while fine-tuning the final retract position at commissioning.
Variable End-Stop Machining
Adapt clamping depths on the fly for different material batches using the rear stopper screw instead of external jigs.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75S the Right Cylinder?
Choose this 125 mm bore cylinder when an application demands high thrust combined with flexible end-position tuning, delivering 6136 N push force at 0.5 MPa. If less force is needed, stepping down to a 100 mm bore yields 3927 N, while upgrading to a 160 mm bore provides 10053 N. The 75 mm adjustment range is ideal for machines processing varying product sizes, allowing rapid changeovers without swapping the cylinder or adding external stops.
To match this exact ISO 15552 interchangeable footprint, specify a 125 mm bore, 220 mm stroke, 75 mm adjustment range, PT tapered port threads, and a magnetic piston for CMSE/DMSE sensors. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the total stroke is 220 mm, ensure proper external guiding to prevent excessive side-loading on the rod.
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 SAIJ125X220-75S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it achieves a top push force of 11045 N.
The rear mechanical adjuster allows you to shorten the effective stroke by up to 75 mm, creating a usable travel window of 145 to 220 mm. It functions as a travel stop and does not lock the load without live air pressure.
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