Airtac SAIJ125 Adjustable Cylinder SAIJ125AX20-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX20-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 20mm 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
- Stroke20 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX20-20S
The AirTAC SAIJ125X20-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N push force at 0.5MPa. Because the 20mm nominal stroke matches the 20mm adjustment range, the usable travel window is 0-20mm. This allows you to dial the end-position back to zero without swapping hardware. It features a SUS420J2 stainless steel rod and a magnet for CMSE reed or DMSE electronic sensors.
The rear adjuster acts purely as a mechanical stop to fine-tune travel and deceleration, not as a lock. For load-holding without live air pressure, an external rod lock or related SAIL cylinder is required. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX20-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX20-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 20 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 SAIJ125AX20-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×20 | 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 SAIJ125AX20-20S Is Used
Precision End-Stop Tuning
Dial in the exact 0-20mm travel window during machine commissioning without adding external stops or changing the cylinder.
Product Changeover
Quickly adjust the stroke end-position on packaging lines when handling different product sizes or thicknesses.
Heavy Assembly Pressing
Leverage the 6136N push force at 0.5MPa for robust clamping and pressing tasks requiring fine mechanical depth control.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX20-20S the Right Cylinder?
Choose this 125mm bore when 80mm (2513N at 0.5MPa) lacks the force for heavy actuation but 160mm (10053N) is physically oversized. The adjustable stroke is ideal for setups needing precise end-stop tuning during commissioning, replacing fixed-stroke SAI cylinders when exact travel varies. It uses PT tapered ports. Given the short 20mm stroke, side-load risks are minimal, but always guide external loads. To hold a load without air, select a SAIL or BSAI lock cylinder instead.
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 SAIJ125AX20-20S FAQ
At 0.5MPa it provides 6136N push and 5734N pull force. At 0.9MPa, the push force increases to 11045N.
The rear adjuster lets you shorten the 20mm stroke by up to 20mm, providing a 0-20mm usable travel window. It acts as a stop and does not hold the load without air pressure.
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 SAIJ125AX20-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.