Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-20 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 SAIJ125X220-20
The AirTAC SAIJ125X220-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 200-220 mm, allowing you to dial in the exact retract position without adding external stops. In the 125 mm bore class, it generates 6136 N of push force and 5734 N of pull force at 0.5 MPa.\n\nThis model features a 32 mm carbon steel piston rod and a PT tapered G1/2 port. It uses variable air cushions at both ends, each offering 40 mm of cushioning travel to manage heavy kinetic energy. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is added later. SAIJ mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-20 |
|---|---|
| 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 SAIJ125X220-20
| 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 SAIJ125X220-20 Is Used
Product Changeovers
Dial in the 200-220 mm retract position on the fly when switching product sizes on a packaging line, avoiding physical cylinder swaps.
End-Stop Calibration
Fine-tune the final retract position during machine commissioning to achieve precise alignment without bolting on extra external stoppers.
Heavy Load Positioning
Leverage 6136 N of thrust at 0.5 MPa to shift heavy pallets or assemblies, using the adjustable stop to set the exact resting distance.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-20 the Right Cylinder?
Choose this adjustable model over a fixed SAI cylinder when your machine setup requires fine end-position tuning during commissioning or product changeovers. If your application needs less force, stepping down to a 100 mm bore yields 3927 N of push force at 0.5 MPa. For higher demands, the 160 mm bore offers 10053 N.\n\nThe rear adjuster acts purely as a mechanical travel stop to set deceleration, not as a lock. It cannot hold a load without live air pressure. For true fail-safe load holding, consider the SAIL pneumatic lock series or an external rod lock. This SAIJ125X220-20 is dimensionally interchangeable with ISO 15552 mounting interfaces, matching the 125 mm bore, 220 mm stroke, 20 mm adjustment, PT port, and standard carbon steel rod configuration.
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 SAIJ125X220-20 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 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.
The rear adjuster allows you to shorten the effective travel from the 220 mm nominal stroke down to 200 mm. This creates a 200-220 mm adjustable window for fine-tuning the end position without changing the cylinder.
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