Airtac SAIJ200 Adjustable Cylinder SAIJ200X400-40S
The AirTAC SAIJ200 Adjustable Cylinder SAIJ200X400-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 400mm 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
- Stroke400 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 SAIJ200X400-40S
The AirTAC SAIJ200X400-40-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 400 mm nominal stroke that can be dialed back by up to 40 mm, creating a 360-400 mm usable travel window for precise end-position tuning during machine commissioning. In this -S configuration, the extruded aluminum barrel includes a magnet for position sensing using AirTAC CMSE reed or DMSE electronic solid-state switches mounted in the dual-side sensor grooves.
The carbon steel rod measures 40 mm with an M36x2 thread, paired with 50 mm variable air cushions at both ends to manage heavy kinetic energy. Fluid must be filtered air at 40 um, operating within a 0.15-1.0 MPa pressure range and a -20 to +70 C temperature environment.
Airtac SAIJ200 Adjustable Cylinder SAIJ200X400-40S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200X400-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 400 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 SAIJ200X400-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×400 | 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 SAIJ200X400-40S Is Used
Heavy Press Tuning
Dial in the exact 360-400 mm end-stop during heavy press commissioning to accommodate material thickness variations without repositioning the entire actuator.
Product Size Changeover
Quickly adjust the retract position on a conveyor sorting line when switching to larger product dimensions, saving downtime compared to swapping out a fixed-stroke cylinder.
Large Fixture Setup
Fine-tune the stroke window on large automated fixtures to ensure precise alignment of heavy 200 mm bore tooling during initial machine build and setup.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200X400-40S the Right Cylinder?
Selecting this 200 mm bore over a neighboring 160 mm bore steps the thrust up from 10053 N to 15708 N at 0.5 MPa, providing the necessary force for heavy pressing or large payload manipulation. An adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops to accommodate product size changes on a line without physically swapping the actuator. The rear adjuster acts purely as a travel stop to set the retract position; it does not hold the load without live air. For true load-holding without pressure, direct your setup to the SAIL locking cylinder, BSAI clamp-lock, or an external rod lock.
When replacing an ISO 15552 cylinder, match the 200 mm bore, 400 mm stroke, 40 mm adjustment range, PT tapered port, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. Because the 400 mm stroke is substantial, the heavy 40 mm rod handles significant side load, but an external guide rail is still recommended to prevent binding on unsupported 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 SAIJ200X400-40S FAQ
At 0.9 MPa, the push force increases to 28274 N.
The rear adjuster screw acts as an external stop that lets you shorten the 400 mm nominal stroke by up to 40 mm, providing a 360-400 mm usable travel window. It only sets the end position and does not lock the load without live air pressure.
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