Airtac SAIJ200 Adjustable Cylinder SAIJ200AX40-20
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX40-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 40mm 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
- Stroke40 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX40-20
The AirTAC SAIJ200X40-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 20 to 40 mm, letting you dial back the 40 mm nominal stroke by up to 20 mm during commissioning. This bore size delivers massive thrust, pushing with 15708 N and pulling with 15080 N at 0.5 MPa. The piston rod is SUS420J2 stainless steel, and the body uses an extruded aluminum barrel with sensor grooves on both sides.
Because the adjuster acts as a hard stop at the retract end, it only sets the travel boundary and relies on the integrated air cushions for end-of-stroke deceleration. It does not lock the load in place without live air pressure. For position holding, you would need a related locking type like SAIL or BSAI. The PT tapered ports are G3/4, and the rod thread is M36x2.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX40-20 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX40-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 40 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 SAIJ200AX40-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×40 | 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 SAIJ200AX40-20 Is Used
Machine Changeovers
Fine-tune the 20 to 40 mm travel window during product size changeovers to set new end positions rapidly without changing the cylinder.
High-Force Positioning
Leverage the 15708 N push force at 0.5 MPa to move heavy assemblies, using the rear stopper to guarantee exact final placement.
Assembly Line Stops
Define variable physical stops on an assembly conveyor, adjusting the stroke on the fly to accommodate different product widths.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX40-20 the Right Cylinder?
Choose this 200 mm bore when your application requires extreme force, as stepping down to a 160 mm bore drops the 0.5 MPa push force to 10053 N. An adjustable stroke is selected over a fixed SAI cylinder when you need variable end-stops for product-size changes on a line without physically swapping cylinders or adding external stops. When matching an ISO 15552 replacement, verify the 40 mm stroke, 20 mm adjustment range, G3/4 PT ports, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set. Since the 40 mm stroke is short, side-loading is minimal, but the heavy 40 mm rod handles high stress well. Note that this standard version lacks a magnet for sensors.
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 SAIJ200AX40-20 FAQ
At 0.5 MPa operating pressure, this 200 mm bore cylinder provides a push force of 15708 N and a pull force of 15080 N. At the maximum 1.0 MPa pressure, it achieves a push force of 3204 kgf.
The rear adjuster screw lets you shorten the 40 mm nominal stroke by up to 20 mm, creating a usable travel window of 20 to 40 mm. This allows precise end-position tuning at commissioning without adding external stops.
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