Airtac SAIJ200 Adjustable Cylinder SAIJ200X85-50
The AirTAC SAIJ200 Adjustable Cylinder SAIJ200X85-50 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 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 SAIJ200X85-50
The AirTAC SAIJ200X85-50 is a double-acting, double-rod ISO 15552 profile cylinder engineered for heavy-duty applications. A rear-mounted adjusting screw allows you to fine-tune the effective stroke, creating a usable travel window of 35-85 mm to accommodate varying product sizes without physically swapping the cylinder.
This adjustable stopper acts purely as a travel end-limit and is not a locking mechanism, meaning live air pressure is still required to hold the load. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback. It uses a PT tapered G3/4 port, a 40 mm carbon steel rod with an M36x2 thread, and 50 mm variable air cushions at both ends to absorb kinetic energy. Operating speed is rated for 30-500 mm/s.
Airtac SAIJ200 Adjustable Cylinder SAIJ200X85-50 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200X85-50 |
|---|---|
| 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 | 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 SAIJ200X85-50
| 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 SAIJ200X85-50 Is Used
Heavy-Duty Stamping
Dial in the exact 35-85 mm contact distance during machine setup to accommodate different material thicknesses without changing tooling.
Large Product Diverting
Adjust the retract stopper on the fly to handle varying package sizes on a heavy-duty transport line, ensuring precise end-of-stroke positioning.
Press Changeover
Quickly reconfigure the effective travel window during production line changeovers, using the rear screw to set new end positions rapidly.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200X85-50 the Right Cylinder?
Choose this 200 mm bore model when your process demands maximum thrust, such as heavy stamping or large press operations, and requires a variable end-stop for rapid product changeover. Conversely, if you require true load-holding without continuous air pressure, this cylinder will not suffice; you should evaluate the SAIL (air-released lock) or BSAI (clamp-lock) variants instead.
When replacing an ISO 15552 cylinder, match the 200 mm bore, 85 mm nominal stroke, 50 mm adjustment range, PT G3/4 port, and your required mounting interface. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, deliberately omitting FB, CA, CB, and CR configurations. Because the 40 mm rod and M36x2 thread provide substantial rigidity, side-load resilience is high, though any long unsupported stroke still necessitates an external guide.
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 SAIJ200X85-50 FAQ
At 0.7 MPa, the push force increases to 21991 N.
The nominal stroke is 85 mm, and the -50 adjustment code allows you to trim the stroke by up to 50 mm. This creates an adjustable travel window of 35-85 mm, letting you fine-tune the end position at commissioning without adding external stops.
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