Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-40 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 SAIJ125AX195-40
The AirTAC SAIJ125X195-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the effective travel to a precise 155-195 mm window during commissioning. It delivers a robust 6136 N push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks. The extruded aluminum barrel design integrates sensor grooves on both sides for straightforward detection mounting.
This specific configuration features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position without needing external shims; it does not hold the load pneumatically. For load-holding without live air pressure, you would need to specify a SAIL or BSAI variant instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-40 |
|---|---|
| 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 SAIJ125AX195-40
| 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 SAIJ125AX195-40 Is Used
Heavy-Duty Machine Setup
Dial in the exact 155-195 mm retract position during initial equipment commissioning or tooling changes without adding external stopper blocks to the machine frame.
Product Size Changeover
Quickly adapt a packaging line for different carton sizes by turning the rear adjuster screw to shift the end-of-stroke stop point on the fly.
Variable End-Stop Positioning
Provide a tunable physical stop for heavy actuators where the final deceleration point must be fine-tuned to match the integrated air cushion performance.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-40 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3927 N at 0.5 MPa) is insufficient for your heavy payload, but a 160 mm bore (10053 N at 0.5 MPa) would be excessive overkill. The 40 mm adjustment range is ideal for product changeovers on a line, letting operators set variable end-stops without swapping out the entire cylinder. The PT tapered port threads match standard pneumatic fittings, and the mounting options cover the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
Because the 195 mm stroke approaches the mid-range of this bore size, the 32 mm rod diameter and M27x2 rod thread provide substantial rigidity, though any long unsupported stroke still requires an external guide to prevent side-loading damage. If you need position feedback, adding the -S magnet option allows the use of AirTAC CMSE reed switches or DMSE solid-state electronic sensors in the dual barrel grooves. This unit is dimensionally interchangeable with ISO 15552 cylinders.
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 SAIJ125AX195-40 FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates 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 of push force.
The rear mechanical adjuster allows you to shorten the nominal 195 mm stroke by up to 40 mm, creating a usable travel window of 155 to 195 mm. This adjuster functions only as a travel stop and does not lock or hold the load without continuous air pressure.
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