Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-40S
The AirTAC SAIJ125X75-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 75 mm travel by up to 40 mm. This creates a highly flexible 35-75 mm usable stroke window, letting you fine-tune the retract end position at commissioning without swapping the cylinder or adding external stops. It delivers a robust 6136 N push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
This specific SKU features a SUS304 stainless steel rod (code B) for superior corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel incorporates sensor grooves on both sides for flexible switch mounting. Fluid is filtered air, operating pressure ranges from 0.15 to 1.0 MPa, and it utilizes variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAIJ125BX75-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SAIJ125BX75-40S Is Used
Product Size Changeover
Dial in the 35-75 mm travel window on the fly during packaging line format changes, accommodating different carton sizes without mechanical rebuilds.
Heavy-Duty Positioning
Leverage the 6136 N push force to move heavy jigs into exact alignment, using the rear stopper to nail the final end-position during machine setup.
Sensor-Driven End Stops
Utilize the integrated magnet with DMSE electronic sensors to confirm the adjusted retraction point, ensuring precise sequencing in automated assembly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-40S the Right Cylinder?
Choose this 125 mm bore when you need substantial thrust—6136 N push at 0.5 MPa or 8590 N at 0.7 MPa. If your application requires less force, stepping down to a 100 mm bore yields 3927 N at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N. The adjustable stroke is selected over a fixed SAI cylinder when a machine requires variable end-stops or frequent product-size changeovers. To match this exact ISO 15552 replacement, specify: 125 mm bore, 75 mm stroke, 40 mm adjustment, PT tapered ports, SUS304 rod, and the -S magnet.
Because the nominal stroke is 75 mm, side-load risks are minimal, but always ensure the M27x2 rod thread is properly aligned. Note that the rear adjuster acts purely as a travel stop and the air cushions only manage deceleration; neither will hold a load without live air pressure. For fail-safe load holding, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead.
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 SAIJ125BX75-40S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If you increase the operating pressure to 0.7 MPa, the push force rises to 8590 N.
The rear adjuster screw allows you to shorten the 75 mm nominal stroke by up to 40 mm, providing a usable travel range of 35 to 75 mm. This stopper fine-tunes the end position but does not lock the load without continuous 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 are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.