Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40 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
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40
The AirTAC SAIJ125X190-40 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers substantial thrust, providing 8590N of push force at 0.7 MPa, making it suitable for heavy-duty operations. By integrating an external adjusting screw at the rear, this model allows you to fine-tune the effective travel down from the 190 mm nominal stroke, creating a precise 150-190 mm usable window without requiring external stops.
This adjuster acts purely as a mechanical stop for end-position tuning during commissioning or product changeover; it does not lock the load without live air. The extruded aluminum barrel features sensor grooves on both sides, and the carbon steel rod with an M27x2 thread provides robust resistance against side loads. It supports a speed range of 30-500 mm/s and uses PT tapered port threads.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40 |
|---|---|
| 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 SAIJ125X190-40
| 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 SAIJ125X190-40 Is Used
Heavy-Duty Forming
Dial in the exact 150-190 mm retract position for metal forming or stamping presses where a few millimeters of adjustment prevents tooling damage.
Product Diverters
Adjust the stroke window on packaging lines to handle different carton sizes without swapping out the entire pneumatic cylinder.
Machine Changeover
Speed up production line changeovers by turning the rear stopper screw to set new end positions quickly during equipment setup.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40 the Right Cylinder?
Select this 125 mm bore cylinder when an application demands high force alongside variable end-position tuning. If the 6136N push force at 0.5 MPa from a 100 mm bore is insufficient, stepping up to this 125 mm model provides a significant power increase. Conversely, if 8590N at 0.7 MPa exceeds your requirement, dropping to a smaller bore saves space and air consumption. Choose the SAIJ adjustable type over a fixed SAI cylinder when you need to dial in the retract distance on the fly, such as during machine setup or product-size changes. Since this is a 190 mm stroke, it is short enough to avoid severe rod deflection, but always ensure adequate external guiding for heavy loads. For load-holding without live pressure, pair this cylinder with an external rod lock or choose an AirTAC SAIL or BSAI model. To match this ISO 15552 footprint exactly, confirm the 125 mm bore, 190 mm stroke, 40 mm adjustment, PT G1/2 port, and the reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ125X190-40 FAQ
At 0.5 MPa it provides 6136N push and 5734N pull force. At 0.7 MPa, the push force increases to 8590N, and it reaches a maximum of 11045N at 0.9 MPa.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective stroke from the 190 mm nominal length by up to 40 mm. This creates a usable travel window of 150-190 mm, but it does not hold the load without continuous air pressure.
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