Airtac SAIJ125 Adjustable Cylinder SAIJ125BX190-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX190-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 190mm 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
- Stroke190 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 SAIJ125BX190-40S
The AirTAC SAIJ125X190-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to 150 mm from the 190 mm nominal length. Delivering 6136 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod (code B) for superior corrosion resistance and operates at speeds of 30-500 mm/s. PT tapered ports and a pre-installed magnet for CMSE or DMSE sensors complete the configuration.
The external rear stopper lets you dial in the exact end position during commissioning without adding external stops or swapping the cylinder. Remember that this rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure. For position holding without continuous air, an external rod lock or a related SAIL pneumatic lock cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX190-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX190-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 190 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 SAIJ125BX190-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×190 | 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 SAIJ125BX190-40S Is Used
Machine Setup Changeover
Quickly dial in the 150-190 mm stroke window during product family changeovers to set precise end positions without repositioning cylinder mounts.
Variable Package Diverter
Adjust the retract stop on the fly to handle different carton sizes on a conveyor line while maintaining 6136 N of pushing force.
Corrosive Environment Actuation
Leverage the SUS304 stainless steel rod for pushing or lifting tasks in washdown or mildly corrosive industrial manufacturing settings.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX190-40S the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (providing 3927 N push at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore is physically too large. The -40 adjustment code is ideal for product changeovers on a packaging line, giving a 150-190 mm usable window to accommodate varying package sizes without mechanical rebuilds. Because the stroke is 190 mm, ensure adequate external guiding if the load is heavy or experiences side loads.
To match this ISO 15552 interchangeable cylinder exactly, specify the 125 mm bore, 190 mm stroke, PT port threads, and the -S magnet option. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles found on some other variants.
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 SAIJ125BX190-40S 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 the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 190 mm down to 150 mm. It only sets the travel end point and does not lock the load without live air pressure.
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