Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-50S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-50S 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 SAIJ200AX185-50S
The AirTAC SAIJ200X185-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 185 mm travel by up to 50 mm. This creates a precise 135-185 mm usable stroke window, ideal for fine-tuning end positions during commissioning without adding external stops. It delivers substantial thrust, offering 21991N push force at 0.7 MPa and a maximum of 3204 kgf at 1.0 MPa.
This SKU features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides. It uses PT tapered ports sized G3/4 and operates at speeds of 30-500 mm/s.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-50S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-50S |
|---|---|
| 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 SAIJ200AX185-50S
| 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 SAIJ200AX185-50S Is Used
Heavy Press Tuning
Dial in the exact 135-185 mm end position for large forming presses during setup, absorbing workpiece tolerances without remounting the actuator.
Product Changeover
Quickly adjust the retract stop for different package sizes on a high-thrust handling line, using the 50 mm window to adapt the stroke on the fly.
Large Assembly Jigs
Leverage the 3204 kgf maximum force to seat heavy components, fine-tuning the travel limit during commissioning to prevent fixture damage.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-50S the Right Cylinder?
Choose this adjustable-stroke model when a fixed-stroke SAI cylinder cannot accommodate product changeovers or precise end-of-stroke tuning on the machine. Instead of swapping the entire cylinder, the rear adjuster screw lets you shorten the travel window from 185 mm down to 135 mm on the fly. If you need less force, stepping down to a 160 mm bore yields 14074N push at 0.7 MPa. For load-holding without live air pressure, note that this cylinder's adjuster is a travel stop, not a lock; you would need a SAIL or BSAI cylinder instead.
To match this ISO 15552 replacement, confirm the 200 mm bore, 185 mm stroke, 50 mm adjustment range, PT G3/4 ports, and the -S magnet. Because the stroke is under 300 mm, side-load risks are moderate, but the robust 40 mm rod and M36x2 thread help handle higher bending stresses. The available mounting set includes Basic, FA, LB, TC, FTC, TCM1, and 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 SAIJ200 Adjustable Cylinder SAIJ200AX185-50S FAQ
At 0.7 MPa, the push force is 21991N and the pull force is 15080N. At the maximum operating pressure of 1.0 MPa, it achieves a push force of 3204 kgf.
A rear stopper screw lets you mechanically shorten the 185 mm nominal stroke by up to 50 mm, providing a usable travel window of 135-185 mm. This adjuster acts only as a travel stop and does not lock the load without live air pressure.
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