Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-40S 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 SAIJ125AX195-40S
The AirTAC SAIJ125X195-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 195 mm travel by up to 40 mm. This yields a precise 155-195 mm usable end-position window, perfect for fine-tuning machinery during commissioning without swapping out the entire actuator. It delivers a robust 6136 N push force at 0.5 MPa, utilizing a 32 mm SUS420J2 stainless steel rod and a PT tapered port thread.
Because this variant includes the -S magnet option, it directly supports AirTAC CMSE reed and DMSE electronic solid-state sensors housed within the dual-side extruded barrel grooves. The rear adjuster functions strictly as a mechanical stop to set the retract endpoint and relies on the integrated air cushion for deceleration; it does not lock or hold the load without continuous live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-40S |
|---|---|
| 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 SAIJ125AX195-40S
| 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 SAIJ125AX195-40S Is Used
Machine Setup & Changeover
Dial in the exact 155-195 mm end position during product size changeovers without adding external stopper blocks to the machine frame.
Variable End-Stop Diverter
Adjust the retract distance on the fly to handle different package lengths on a high-thrust sorting conveyor line.
Commissioning Fine-Tuning
Trim the stroke by up to 40 mm during initial commissioning to perfectly sync timing with downstream equipment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-40S the Right Cylinder?
Select this 125 mm bore actuator when an application demands high thrust that exceeds the 3927 N push capacity of the 100 mm variant at 0.5 MPa, but does not require the extreme 10053 N output of the 160 mm size. The adjustable 155-195 mm stroke is ideal for product changeovers on a packaging line, letting operators set variable end-stops on the fly instead of installing fixed external stops or reverting to a standard SAI cylinder.
For load-holding without live air pressure, this cylinder is insufficient as the adjuster is only a travel stop, not a brake; you should instead explore an AirTAC SAIL or BSAI locking cylinder. To guarantee a true ISO 15552 replacement match, verify the 125 mm bore, 195 mm stroke, 40 mm adjustment range, PT port thread, and the required mounting style from the available SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or 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 SAIJ125AX195-40S 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 its maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear mechanical adjuster allows you to shorten the 195 mm nominal stroke by up to 40 mm, creating a usable travel window of 155-195 mm. It acts as a physical stop and does not hold the load without live air.
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