Airtac SAIJ125 Adjustable Cylinder SAIJ125X65-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X65-40 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 SAIJ125X65-40
The AirTAC SAIJ125X65-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. With a nominal 65 mm stroke and a 40 mm adjustment range, it provides a usable travel window of 25 to 65 mm. This allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops. In the 125 mm bore class, it generates 6136 N of push force and 5734 N of pull force at 0.5 MPa operating pressure.
The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic sensors, though this specific configuration omits the -S magnet. The carbon steel rod and M27x2 rod thread provide robust resistance to side loading, but long unsupported strokes still require an external guide. The rear adjuster acts purely as a travel stop to set deceleration and end limits, meaning it cannot hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X65-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X65-40 |
|---|---|
| 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 SAIJ125X65-40
| 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 SAIJ125X65-40 Is Used
Product Changeover
Dial in the 25 to 65 mm travel window during production line changeovers to accommodate varying part sizes without changing hardware.
End-Position Tuning
Fine-tune the retract end-position at machine commissioning using the rear stopper, eliminating the need for external mechanical stops.
Heavy Load Handling
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or fixtures while precisely limiting the final stroke distance.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X65-40 the Right Cylinder?
Choose this 125 mm bore cylinder when an application requires heavy thrust (6136 N at 0.5 MPa) alongside variable end-stop positioning. If you need less force, stepping down to the 100 mm bore yields 3927 N of push force at 0.5 MPa. An adjustable stroke is ideal for machine setups requiring frequent product-size changeovers, offering a variable end-stop rather than a fixed SAI stroke.
For load-holding without continuous live air pressure, this plain SAIJ cylinder is insufficient because the rear adjuster is a stop, not a lock. You would need to specify an SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead. To match this exact ISO 15552 replacement, specify: 125 mm bore, 65 mm stroke, 40 mm adjustment, PT tapered port, mounting from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2), and no magnet.
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 SAIJ125X65-40 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The 65 mm nominal stroke can be shortened by up to 40 mm via a rear adjusting screw, creating a usable travel window of 25 to 65 mm. The adjuster acts as a travel stop and does not lock the load without live air.
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 SAIJ125X65-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.