Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 65mm 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
- Stroke65 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-40
The AirTAC SAIJ125X65-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5MPa. It features a 32mm SUS420J2 stainless steel rod and PT tapered port threads. By turning the rear stopper screw, you can trim the 65mm nominal stroke back by up to 40mm, creating a precise 25-65mm usable travel window for exact end-position tuning.
This adjustable travel capability allows you to fine-tune the retract position at commissioning without swapping the cylinder or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is specified later. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 65 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 SAIJ125AX65-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×65 | 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 SAIJ125AX65-40 Is Used
Variable End Stops
Dial in the exact retract distance within the 25-65mm window during machine setup to accommodate different material thicknesses without mechanical rework.
Product Changeover
Quickly adjust the stroke end on packaging lines when switching between different container sizes, leveraging the 6136N thrust to handle heavy loads.
Commissioning Fine-Tune
Trim the travel by up to 40mm on-site to perfectly align tooling points, eliminating the need to physically swap out a fixed-stroke SAI cylinder.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-40 the Right Cylinder?
Choose this 125mm bore when you need heavy thrust (6136N push at 0.5MPa) that exceeds the 3927N push capacity of the 100mm bore, but want to avoid the larger 160mm frame. The 25-65mm adjustable window is ideal for product-size changeovers on a line. If your machine requires the rod to hold its place without live air pressure, note that this rear adjuster acts only as a travel stop and not a lock; you would need an SAIL air-released lock cylinder or an external rod lock instead. For a direct ISO 15552 replacement match, verify the 125mm bore, 65mm stroke, 40mm adjustment, PT G1/2 port, and standard mounting.
Because the 32mm rod and M27x2 thread provide substantial rigidity, side-load resistance is excellent, though any long unsupported stroke still requires an external guide.
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 SAIJ125AX65-40 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach up to 11045N push force at 0.9MPa.
The rear stopper screw allows you to shorten the 65mm nominal stroke by up to 40mm, providing a usable travel window of 25-65mm. The adjuster acts 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 SAIJ125AX65-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.