Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 85mm 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
- Stroke85 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50
The AirTAC SAIJ200X85-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers massive thrust, pushing 15708N and pulling 15080N at 0.5 MPa. The integrated stopper screw allows you to shorten the nominal 85mm stroke by up to 50mm, creating a highly versatile 35-85mm usable travel window for precise positioning during machine commissioning.
This heavy-duty actuator uses a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and features PT tapered port threads (G3/4) for a robust pneumatic connection. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback. The rear adjuster acts purely as a travel stop to fine-tune end positions without adding external stops; it is not a locking mechanism and cannot hold loads without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 85 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 SAIJ200AX85-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×85 | 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 SAIJ200AX85-50 Is Used
Heavy Pressing Operations
Dial in the exact 35-85mm travel window during setup to apply 15708N of pressing force without over-stroking fragile tooling.
Product Changeover Systems
Quickly fine-tune the retract end position by up to 50mm to accommodate different workpiece sizes on the same assembly line.
Large Assembly Jigs
Leverage the SUS420J2 stainless rod and massive 2805 kgf max force for rugged, corrosion-resistant positioning in harsh industrial environments.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50 the Right Cylinder?
Selecting this 200mm bore actuator makes sense when your application requires extreme force combined with variable end-position tuning. If your setup needs slightly less thrust, stepping down to a 160mm bore yields 10053N of push force at 0.5 MPa. Choose this adjustable SAIJ model over a fixed-stroke SAI cylinder when you need on-the-fly travel adjustments to accommodate product size changes on a line, rather than swapping the entire actuator. To match this configuration for an ISO 15552 replacement, specify the 200mm bore, 85mm stroke, 50mm adjustment, PT port thread, and no magnet.
For any stroke of 300mm or more, you would typically need an external guide to prevent rod binding, but this 85mm stroke is short enough to manage side loads effectively. Remember that the rear adjuster and the variable air cushions only decelerate the piston; they do not function as a brake. For true load-holding without continuous air pressure, consider the SAIL (air-released lock) or BSAI (clamp-lock) variants 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 SAIJ200AX85-50 FAQ
At 0.5 MPa operating pressure, this 200mm bore cylinder provides 15708N of push force and 15080N of pull force. At its maximum rated pressure of 1.0 MPa, it can deliver up to 3204 kgf of thrust.
The rear adjuster screw acts as a mechanical stop that lets you trim the effective travel back from the nominal 85mm stroke down to as little as 35mm. This allows precise end-position tuning during commissioning without needing to replace the cylinder or add external stops.
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