Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-20
The AirTAC SAIJ125X105-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 85 to 105 mm, allowing you to dial back the nominal 105 mm stroke by up to 20 mm during commissioning without adding external stops. It delivers robust thrust, pushing 6133 N and pulling 5734 N at 0.5 MPa.
This variant is configured with a SUS420J2 stainless steel rod for enhanced durability against surface wear, and PT tapered port threads for a tight pneumatic seal. The extruded aluminum barrel includes sensor grooves on both sides, ready to accept CMSE reed or DMSE electronic sensors if a magnet is added later. The rear adjuster acts purely as a travel stop and does not lock the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 105 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 SAIJ125AX105-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×105 | 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 SAIJ125AX105-20 Is Used
Product Changeover Tuning
Dial in the exact end-stop position for varying product sizes on a packaging line without physically swapping cylinders or repositioning hard stops.
Machine Setup Calibration
Fine-tune the 85-105 mm travel window during initial commissioning to perfectly seat heavy components, using the 6133 N thrust to seat parts accurately.
Variable End-Stop Forming
Adjust the rear stroke position on the fly for multi-model assembly fixtures, leveraging the SUS420J2 rod for resistance to wear in repetitive operations.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-20 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (delivering 3927 N push at 0.5 MPa) is insufficient, but you want to avoid the size and air consumption of a 160 mm bore. The 20 mm adjustment range is ideal for machines that require precise end-position tuning during product changeovers, replacing the need to physically swap out a fixed-stroke SAI cylinder. When matching an ISO 15552 replacement, verify the 105 mm stroke, 20 mm adjust code, G1/2 port, and PT thread type. Because the stroke is over 300 mm, an external guide is recommended to prevent excessive side-load on the rod.
For applications needing to hold a load without continuous air pressure, note that this cylinder's rear stopper and air cushions cannot function as a brake. Instead, consider the SAIL pneumatic lock series, the BSAI clamp-lock variant, or an external rod lock system. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR mounts.
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 SAIJ125AX105-20 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. The operational speed range is 30-500 mm/s.
The rear adjuster screw lets you shorten the effective travel from the nominal 105 mm down to 85 mm, creating an 85-105 mm adjustable window. It functions as a travel stop and does not lock the load without live 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 SAIJ125AX105-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.