Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 195mm 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
- Stroke195 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-20
The AirTAC SAIJ125X195-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 6136N push force at 0.5 MPa and features a 175-195 mm usable travel window, allowing you to trim up to 20 mm off the 195 mm nominal stroke during commissioning.
This model features a robust 32 mm carbon steel rod and M27x2 piston thread, handling substantial loads with a maximum speed of 30-500 mm/s. It uses PT tapered G1/2 ports and variable air cushions at both ends to manage deceleration. The extruded aluminum barrel includes sensor grooves on both sides for mounting CMSE reed or DMSE electronic switches if needed.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 195 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 SAIJ125X195-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×195 | 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 SAIJ125X195-20 Is Used
Variable End-Stop Positioning
Dial in the exact retract distance between 175 and 195 mm on heavy machinery to accommodate different material thicknesses without adding external stopper blocks.
Machine Setup and Changeover
Quickly fine-tune the end-of-stroke position during product line changeovers, saving downtime by adjusting the rear screw rather than replacing the entire cylinder.
Heavy Assembly Presses
Leverage the 6136N push force at 0.5 MPa for pressing and seating components, using the adjustable stroke to precisely control the pressing depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-20 the Right Cylinder?
Choose this 125 mm bore when your application requires heavy thrust (6136N push / 5734N pull at 0.5 MPa) and on-the-fly end-position tuning without swapping cylinders. If your force requirements are lower, stepping down to an 80 mm bore yields 2513N push at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053N. The rear adjuster screw acts purely as a mechanical stop to fine-tune the retract distance; it does not lock the load. For position holding without live air pressure, select the SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 195 mm nominal stroke, 20 mm adjustment range, PT G1/2 port thread, and standard carbon steel rod. The SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
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 SAIJ125X195-20 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster screw allows you to shorten the 195 mm nominal stroke by up to 20 mm, creating a usable travel window of 175-195 mm. This stopper fine-tunes the end position but does not hold the load without live air pressure.
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