Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-50
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-50 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 SAIJ200AX185-50
The AirTAC SAIJ200X185-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 135 to 185 mm for exact end-position tuning. It delivers massive thrust, providing 15708 N of push force and 15080 N of pull force at a 0.5 MPa operating pressure. The piston utilizes a robust 40 mm rod paired with an M36x2 thread, and the standard variable air cushion at both ends measures 50 mm to absorb heavy kinetic energy.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and includes PT tapered port threads. The extruded aluminum barrel incorporates sensor grooves on both sides for direct mounting of position switches. While the rear adjuster allows you to dial in the retract distance without adding external stops, it functions purely as a travel limiter and does not hold the load without continuous live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-50 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-50 |
|---|---|
| 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 SAIJ200AX185-50
| 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 SAIJ200AX185-50 Is Used
Heavy Pressing
Delivers up to 21991 N of push force at 0.7 MPa for heavy-duty assembly and pressing operations requiring high kinetic energy absorption.
Machine Setup
The 50 mm rear adjuster allows technicians to fine-tune the retract end-position during initial commissioning without machining custom spacers.
Product Changeover
Ideal for production lines running varied product sizes, letting operators quickly dial the stroke back from 185 mm down to 135 mm.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-50 the Right Cylinder?
Selecting this 200 mm bore size is appropriate when applications require up to 15708 N of push force at 0.5 MPa, or 21991 N at 0.7 MPa. If your process demands less force, stepping down to a 160 mm bore yields 10053 N at 0.5 MPa, whereas the 200 mm bore is necessary for heavy-duty pressing and lifting. The adjustable stroke is chosen over a fixed SAI cylinder when you need on-the-fly end-stop tuning during commissioning or product changeover. For load-holding without live pressure, this cylinder is insufficient as the adjuster is only a stop; you should consider an external rod lock, a pilot-operated check valve, or AirTAC SAIL and BSAI locking cylinders. This model uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options.
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 SAIJ200AX185-50 FAQ
At 0.5 MPa, it provides 15708 N of push force and 15080 N of pull force. At 0.7 MPa, the push force increases to 21991 N. The operating speed range for this 200 mm bore is 30 to 500 mm/s.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective travel from the 185 mm nominal stroke down to 135 mm. This creates a 50 mm adjustable window for precise end-position tuning without swapping the cylinder.
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