Airtac SAIJ200 Adjustable Cylinder SAIJ200X280-20
The AirTAC SAIJ200 Adjustable Cylinder SAIJ200X280-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 280mm 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
- Stroke280 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 SAIJ200X280-20
The AirTAC SAIJ200X280-20 is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical stopper, allowing you to dial back the nominal 280 mm stroke by up to 20 mm. This creates a precise 260-280 mm usable travel window, ideal for fine-tuning end positions during heavy machinery commissioning without swapping out the entire actuator. Driven by a robust 40 mm carbon steel rod with an M36x2 thread, it handles massive thrust up to 15708 N at 0.5 MPa and 21991 N at 0.7 MPa.
Unlike fixed-stroke SAI units, this adjustable variant lets you set variable end-stops directly at the rear cap for product-size changeovers. The extruded aluminum barrel features sensor grooves on both sides for mounting CMSE reed or DMSE solid-state switches. Note that the rear adjuster acts purely as a travel stop to set deceleration endpoints, not as a locking device, so it will not hold a load without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200X280-20 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200X280-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 280 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 SAIJ200X280-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×280 | 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 SAIJ200X280-20 Is Used
Heavy Press Tuning
Dial in the exact 260-280 mm end position during heavy press commissioning to accommodate material thickness variations without machining new spacers.
Pallet Changeover
Adjust the retract stopper by up to 20 mm to handle different pallet widths on a transfer line, ensuring precise stops without repositioning the cylinder.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200X280-20 the Right Cylinder?
Choose the adjustable SAIJ over a fixed SAI when you anticipate product changeovers or need to micro-adjust the retract end without adding external stops. To match this ISO 15552 replacement exactly, specify: 200 mm bore, 280 mm stroke, 20 mm adjustment, PT tapered port threads, standard carbon steel rod, and no magnet.
Because the stroke is 280 mm, the long unsupported piston rod is susceptible to side-loading and sagging. Even with the heavy 40 mm rod, you should incorporate an external guide rail to prevent premature seal wear and binding. Furthermore, if the machine requires true load-holding without continuous air pressure, this cylinder will not suffice; you must pivot to the SAIL air-released lock or BSAI clamp-lock series 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 SAIJ200X280-20 FAQ
At 0.7 MPa, the push force increases to 21991 N.
A rear stopper screw lets you shorten the 280 mm nominal stroke by up to 20 mm, providing a usable travel window of 260-280 mm. It functions as a mechanical stop to tune the end position, not as a lock to hold the load without air pressure.
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