Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-30S 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 SAIJ125BX75-30S
The AirTAC SAIJ125X75-30-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 30 mm. This yields a precise 45-75 mm usable stroke window, perfect for dialing in end positions during machine commissioning without swapping out the physical cylinder. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads with ease.
This specific SKU integrates a SUS304 stainless steel rod for superior corrosion resistance and includes a piston magnet for electronic DMSE or reed CMSE position sensing. The extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting. Unlike tie-rod designs, this profile cylinder maintains a compact, dimensionally interchangeable ISO 15552 mounting interface.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-30S |
|---|---|
| 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 SAIJ125BX75-30S
| 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 SAIJ125BX75-30S Is Used
Variable End-Stop Positioning
Fine-tune the retract distance within the 45-75 mm window during machine setup to accommodate different product dimensions without adding external mechanical stops.
Heavy-Duty Product Changeover
Rapidly adjust the stroke end-position on automated lines when switching between product sizes, leveraging the 6136 N push force for demanding press or lift operations.
Corrosive Environment Actuation
Utilize the SUS304 stainless steel rod and robust 125 mm bore thrust for reliable clamping and positioning in washdown or chemically exposed manufacturing settings.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-30S the Right Cylinder?
Select this 125 mm bore when your application demands high force (6136 N push at 0.5 MPa) alongside variable end-stop positioning. If your thrust requirements are lower, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N. The rear adjuster acts solely as a mechanical stop to fine-tune the retract stroke; it does not lock or hold the load without continuous live air pressure. For load-holding requirements without air, consider an AirTAC SAIL or BSAI series cylinder instead.
This configuration includes a PT tapered port, a SUS304 stainless steel rod, and a built-in magnet (-S) for use with CMSE and DMSE sensors. It supports the standard SAIJ mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is under 300 mm, side-load risks are minimal, though the robust 32 mm rod and M27x2 thread naturally handle greater off-center loads than smaller bores.
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 SAIJ125BX75-30S FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can achieve up to 1251 kgf at its maximum rated pressure of 1.0 MPa.
The rear adjusting screw allows you to shorten the effective stroke by up to 30 mm. This creates a usable travel window of 45 to 75 mm, letting you set the exact retract end-position at commissioning without replacing the cylinder.
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