Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-75S
The AirTAC SAIJ125X225-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa, utilizing a 32mm SUS420J2 stainless steel piston rod. By turning the rear stopper screw, you unlock a usable travel window of 150 to 225 mm, enabling precise end-position tuning without swapping out the entire actuator.
This unit includes a magnet for CMSE and DMSE sensors, with the electronic DMSE solid-state switches offering high shock resistance for heavy-duty cycling. The extruded aluminum barrel incorporates sensor grooves on both sides for flexible mounting. It uses a G1/2 port and achieves a standard speed range of 30-500 mm/s, supported by 40mm variable air cushions at both ends to decelerate heavy loads smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAIJ125AX225-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SAIJ125AX225-75S Is Used
Product Changeover Tuning
Rapidly reconfigure end-stops for different package sizes on a packaging line using the 150-225mm travel window, eliminating the need for custom actuator swaps.
Heavy Press Positioning
Leverage the 6136N push force at 0.5 MPa to seat heavy components, using the rear adjuster to dial in the exact contact depth without mechanical shims.
Machine Commissioning
Fine-tune the retract end-position during initial setup to align multiple stations perfectly, relying on the 40mm air cushions to absorb the high kinetic energy.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-75S the Right Cylinder?
Choose this 125mm bore when your application requires substantial thrust—such as 6136N at 0.5 MPa or 8590N at 0.7 MPa—exceeding the 3927N push capacity of the 100mm bore. The 75mm adjustment range is ideal for production lines running mixed product sizes, allowing operators to dial in the stroke during changeovers instead of bolting on external stops. For lower force needs at lower pressures, stepping down to the 100mm bore provides a lighter, faster 30-800 mm/s cycle.
Because the nominal stroke is 225mm, you should ensure adequate external guiding to prevent excessive side-loading on the rod. Remember that the rear adjuster acts only as a travel stop; it does not hold the load without live air pressure. For true pneumatic locking without pressure, consider the SAIL or BSAI series. To match this ISO 15552 replacement, specify bore 125, stroke 225, 75mm adjust, PT tapered port, and the -S magnet option.
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 SAIJ125AX225-75S FAQ
A stopper screw at the rear of the cylinder limits the retract stroke. For this model, you can trim the effective travel back by up to 75mm, creating an adjustable working window between 150mm and 225mm. This allows precise end-position tuning without changing the physical cylinder.
At 0.5 MPa, the SAIJ125X225-75-S provides 6136N of push force and 5734N of pull force. If you increase the operating pressure to 0.7 MPa, the push force rises to 8590N.
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 SAIJ125AX225-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.