Airtac SAIJ125 Adjustable Cylinder SAIJ125AX475-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX475-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX475-40S
The AirTAC SAIJ125X475-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5 MPa and features a 475mm nominal stroke that can be fine-tuned down by up to 40mm, providing an exact 435-475mm usable travel window during commissioning. This adjustability eliminates the need to swap cylinders or bolt on external stops when product sizes change on your line.
This model includes a SUS420J2 stainless steel rod for enhanced corrosion resistance and a built-in magnet for CMSE reed and DMSE electronic sensors. Operating at speeds of 30-500mm/s, it uses PT tapered G1/2 ports. 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 SAIJ125AX475-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX475-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 475 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 SAIJ125AX475-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×475 | 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 SAIJ125AX475-40S Is Used
Variable End-Stop Tuning
Dial in the exact 435-475mm retraction point during setup without disassembling the machine or adding external mechanical stops.
Product Size Changeover
Quickly adapt the stroke window on automated lines when switching to a new product length, minimizing downtime.
Heavy Fixture Positioning
Leverage 6136N of push force to move heavy jigs while precisely trimming the end position to prevent hard crashes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX475-40S the Right Cylinder?
Choose this 125mm bore when a 100mm bore (offering 3927N push at 0.5MPa) lacks the thrust for heavier fixtures, but a 160mm bore (10053N) is physically oversized. The adjustable 435-475mm travel is selected over a fixed-stroke SAI when you need variable end-stops for rapid machine changeover. To match this exact SKU for an ISO 15552 replacement, verify the 475mm stroke, 40mm adjustment range, PT G1/2 port, and the -S magnet requirement.
Because the 475mm stroke is substantial, the M27x2 rod and thread can handle high side loads, but an external guide rail is still recommended to prevent rod binding over long unsupported travel. Remember that the rear adjuster is a travel stop, not a lock; the SAIJ does not hold loads without live air. For true pneumatic load-holding, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ125AX475-40S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
A rear screw stopper allows you to shorten the 475mm nominal stroke by up to 40mm, creating a 435-475mm adjustable travel window. This stopper only sets the end position; it 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 SAIJ125AX475-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.