Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-75
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 185mm stroke, G3/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ200 mm
- Stroke185 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-75
The AirTAC SAIJ200X185-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the effective travel window between 110 and 185 mm without swapping out the unit. In this configuration, the piston rod is built from SUS420J2 stainless steel (code A) for enhanced corrosion resistance, and the PT tapered port threads ensure a robust, sealed connection. Delivering a substantial 15708 N pull force at 0.5 MPa, it is engineered for heavy-duty positioning tasks.
This model features an extruded aluminum barrel with sensor grooves on both sides, though no magnet is specified in this exact configuration. The rear adjuster acts purely as a mechanical stop to set the retraction end-position accurately during commissioning or product changeover. It is important to note that this adjuster, along with the standard variable air cushions at both ends, only decelerates the load; it does not function as a lock or brake to hold the load without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-75 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 185 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2 |
| 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, 50 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 (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×185 | 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 SAIJ200 Adjustable Cylinder SAIJ200AX185-75 Is Used
Variable End-Stop Positioning
Dial in the exact retraction point between 110 and 185 mm for heavy-duty machining fixtures that require precise end-position tuning during initial commissioning.
Product Size Changeover
Quickly adjust the travel window on packaging lines when switching between different product sizes, using the rear stopper to set the new stroke without replacing the cylinder.
Heavy-Duty Clamping
Leverage the 15708 N pull force at 0.5 MPa to secure large workpieces, using the adjustable stroke to compensate for varying material thicknesses during automated clamping.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-75 the Right Cylinder?
Choose this 200 mm bore cylinder when your application demands high thrust, such as 21991 N push at 0.7 MPa, combined with the flexibility to dial in the exact end-stop during setup. If your force requirements are lower, stepping down to a 160 mm bore yields 9425 N pull at 0.5 MPa, which might better suit mid-weight machinery. The SAIJ200X185-75 is selected over a fixed-stroke SAI specifically when product sizes vary on the line and the 110-185 mm travel window needs rapid, tool-free adjustment at the rear screw rather than adding external stops.
When replacing an ISO 15552 cylinder, match the 200 mm bore, 185 mm stroke, 75 mm adjustment range, PT G3/4 port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 185 mm stroke is relatively short for this massive bore, side-load concerns are minimal, but an external guide is always recommended if the load is heavy or off-center. For any true load-holding requirements without continuous air pressure, this cylinder will not suffice; you should look toward 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 SAIJ200 Adjustable Cylinder SAIJ200AX185-75 FAQ
At a 0.5 MPa operating pressure, this 200 mm bore cylinder provides a push force of 15708 N and a pull force of 15080 N. At 0.7 MPa, the push force increases to 21991 N.
The rear adjusting screw allows you to mechanically shorten the effective stroke from its 185 mm nominal length down to as little as 110 mm. This creates a 110-185 mm usable travel window, enabling fine-tuning of the end position at commissioning without adding external stops.
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