Airtac SAIJ200 Adjustable Cylinder SAIJ200X85-50S
The AirTAC SAIJ200 Adjustable Cylinder SAIJ200X85-50S 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ200 mm
- Stroke85 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200X85-50S
The AirTAC SAIJ200X85-50-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 35-85 mm usable travel window by allowing you to dial back the 85 mm nominal stroke by up to 50 mm.
It features a carbon steel piston rod and a PT tapered port thread. The -S variant includes a magnet for position sensing, working seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches housed in the dual-side sensor grooves. The rear adjuster acts purely as a mechanical stop for end-position tuning and does not hold the load without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200X85-50S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200X85-50S |
|---|---|
| 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 | 15080 N | 15080 N |
| 0.7 MPa | 21111 N | — |
| Max (@1.0 MPa) | 3075 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ200 Adjustable Cylinder SAIJ200X85-50S
| 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 SAIJ200X85-50S Is Used
Heavy Press Tuning
Dial in the exact 35-85 mm travel on a heavy stamping press during setup, ensuring precise crushing or forming depth without swapping cylinders.
Product Changeover
Quickly adjust the retract end-stop on an assembly line when switching between product variants that require slightly different stroke lengths.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200X85-50S the Right Cylinder?
Select this 200 mm bore when an application requires extreme thrust—stepping down to a 160 mm bore reduces the 0.7 MPa push force to 14074 N. The adjustable stroke is chosen over a fixed SAI cylinder when you need to fine-tune the exact end position during commissioning or product changeover without adding external stops. For load-holding without continuous air, use a SAIL pneumatic lock or BSAI clamp-lock cylinder instead of relying on the adjuster.
To match this ISO 15552 replacement, specify: 200 mm bore, 85 mm stroke, 50 mm adjustment, PT G3/4 port, and the -S magnet. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Although the stroke is short, the 40 mm rod diameter and M36x2 thread handle high side-load stresses, but an external guide is still recommended for heavy offset loads.
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 SAIJ200X85-50S FAQ
The 50 mm adjustment screw allows you to trim the 85 mm nominal stroke back, giving an adjustable usable travel window of 35-85 mm.
No, the rear adjuster is a travel stop for fine-tuning end positions, not a lock. It cannot hold a load without live air pressure. For fail-safe load holding, you should use an AirTAC SAIL (air-released lock) or BSAI (clamp-lock) cylinder.
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Standard models are processed and dispatched in 3-5 business days.
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