Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-20S 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 SAIJ125X195-20S
The AirTAC SAIJ125X195-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 175 to 195 mm, allowing you to fine-tune the retract end-position by up to 20 mm during commissioning without swapping the unit. This 125 mm bore generates 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it suited for heavy-duty positioning.
Equipped with a magnet for position sensing, it supports AirTAC CMSE reed and DMSE electronic sensors via the dual-side barrel grooves. The carbon steel rod with an M27x2 thread handles robust loads, while the PT tapered port threads ensure a tight pneumatic connection. It includes variable air cushions at both ends to manage deceleration, and the mounting hardware is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-20S |
|---|---|
| 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 SAIJ125X195-20S
| 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 SAIJ125X195-20S Is Used
Product Changeover Tuning
Dial in the exact 175-195 mm retract position during machine setup to accommodate different product lengths without replacing the cylinder.
Heavy-Duty End Stopping
Leverage the 6136 N push force at 0.5 MPa to move heavy assemblies, using the rear screw to set a precise, repeatable end-of-travel stop.
Position Sensing Setup
Utilize the integrated magnet with DMSE electronic sensors to confirm travel completion within the adjusted 20 mm window.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-20S the Right Cylinder?
Select this 125 mm bore cylinder when your application requires substantial force, stepping up from the 80 mm bore that provides 2513 N at 0.5 MPa. The adjustable stroke is ideal for variable product changeovers, replacing a fixed-stroke SAI cylinder when you need an external mechanical stop to dial in the exact end position. To match this ISO 15552 replacement, verify the 125 mm bore, 195 mm stroke, 20 mm adjustment, PT port threads, and the -S magnet requirement.
Because the stroke is 195 mm, which is approaching the mid-range for this bore size, ensure your mounting configuration adequately supports the load to prevent excessive side-loading on the M27x2 rod. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series instead.
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 SAIJ125X195-20S FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. The maximum thrust is 1251 kgf at 1.0 MPa.
The rear adjuster screw allows you to shorten the effective stroke from the nominal 195 mm down to 175 mm. This creates a 20 mm tuning window to fine-tune the end position at commissioning without adding external stops.
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