Airtac SAIJ125 Adjustable Cylinder SAIJ125X375-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X375-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 375mm 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
- Stroke375 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X375-100
The AirTAC SAIJ125X375-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 6136N of push force at 0.5 MPa. It features a 375mm nominal stroke that can be dialed back by up to 100mm, creating a precise 275-375mm usable travel window for on-the-fly positioning. This adjuster acts purely as a mechanical stop to set the retract end position and does not lock the load without live air pressure.
Built with a carbon steel rod and a PT tapered port thread, this 125mm bore unit operates at speeds of 30-500mm/s. It utilizes a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is specified later.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X375-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X375-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 375 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 SAIJ125X375-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×375 | 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 SAIJ125X375-100 Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 275-375mm window during machine commissioning to accommodate different product sizes without mechanical rebuilds.
Heavy Forming Press
Leverage the 6136N push force at 0.5MPa for high-thrust forming operations while using the rear screw to fine-tune the tooling clearance.
Automated Assembly Line
Adjust the stroke on the fly during product family changeovers, utilizing the standard ISO 15552 footprint to maintain machine layout compatibility.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X375-100 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder's 2513N push force at 0.5MPa is insufficient, but you want to avoid stepping up to a 160mm unit. The 100mm adjustment range is perfect for product changeovers, allowing you to fine-tune the end position during commissioning without swapping the cylinder or adding external stops. For load-holding without continuous live air, this cylinder is not suitable; you should look to the SAIL or BSAI series instead.
Because this model has a 375mm stroke, the 32mm diameter carbon steel rod will experience leverage forces under side loads; an external guide mechanism is recommended to prevent premature seal wear. To match this exact ISO 15552 replacement, specify the 125mm bore, 375mm stroke, 100mm adjustment, PT port thread, and your required mounting kit.
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 SAIJ125X375-100 FAQ
At an operating pressure of 0.5MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke from its 375mm nominal length down to 275mm. It sets the travel end but 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 SAIJ125X375-100
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.