Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-20
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-20 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 SAIJ200AX85-20
The AirTAC SAIJ200X85-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the nominal 85 mm stroke by up to 20 mm. This yields a precise 65-85 mm usable travel window, perfect for fine-tuning end positions during commissioning without swapping hardware. It delivers robust thrust, pushing 21991 N at 0.7 MPa, making it suited for heavy-duty positioning.
This unit features a 40 mm SUS420J2 stainless steel rod and PT tapered porting. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed and DMSE electronic solid-state switches. Remember that the rear adjuster acts only as a travel stop for deceleration; it does not hold the load without live air pressure.
For load-holding without continuous air, explore SAIL or BSAI variants.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-20 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-20 |
|---|---|
| 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 SAIJ200AX85-20
| 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 SAIJ200AX85-20 Is Used
Heavy Press Tuning
Dial in the exact 65-85 mm press distance during product changeovers to ensure perfect assembly force without external stops.
Variable End-Stop Setup
Use the rear adjuster to set precise retraction limits for heavy machinery indexing, accommodating different material thicknesses on the fly.
Position Calibration
Fine-tune the end-of-stroke position during initial commissioning to align heavy 21991 N loads perfectly with downstream equipment.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-20 the Right Cylinder?
Choose this 200 mm bore when substantial force is required, as it provides 21991 N push force at 0.7 MPa. If you need less power, stepping down to a 160 mm bore yields 14074 N at the same pressure. The adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers, offering more flexibility than a fixed SAI cylinder.
When replacing an ISO 15552 cylinder, match the 200 mm bore, 85 mm stroke, 20 mm adjustment, PT G3/4 port, and Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting. Because the stroke is under 300 mm, side-load stress is minimized, though the 40 mm rod and M36x2 thread handle high loads well.
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 SAIJ200AX85-20 FAQ
At 0.7 MPa operating pressure, this 200 mm bore cylinder provides 21991 N of push force and 15080 N of pull force. It can reach up to 28274 N push force at 0.9 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the 85 mm nominal stroke by up to 20 mm, creating a 65-85 mm usable travel window. It sets the end position but does not lock the load without live air.
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