Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 200mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-20
The AirTAC SAIJ40X200-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 879N of push force at 0.7 MPa and provides a usable travel window of 180-200mm, letting you trim the effective stroke by up to 20mm during commissioning without swapping hardware.
This unit is built with a SUS304 stainless steel rod for superior corrosion resistance and utilizes PT tapered ports. It includes variable air cushions at both ends to absorb kinetic energy, while the extruded aluminum barrel features dual sensor grooves for flexible switch placement.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 200 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×200 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX200-20 Is Used
Machine Changeover
Dial in the 180-200mm travel window during product changeovers to accommodate new package lengths without repositioning cylinder mounts.
Variable End Stops
Fine-tune the retraction point on diverter arms to handle slight variations in product positioning on the line.
Setup Calibration
Trim the stroke by up to 20mm during initial commissioning to perfectly sync tooling contact without machining external spacers.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-20 the Right Cylinder?
Choose this 40mm bore when an application requires precise end-position tuning on the fly, such as accommodating slight product size variations on a conveyor. If your setup needs less force, stepping down to a 32mm bore yields 563N at 0.7 MPa; stepping up to a 50mm bore provides 1374N.
When replacing an ISO 15552 cylinder, match the 40mm bore, 200mm stroke, PT port thread, and the 20mm adjustment range. Note that SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB, CA, CB, and CR. Because the stroke is 200mm, ensure external guiding if the load is heavy or subject to high side loads. The rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider an external rod lock or a SAIL cylinder.
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 SAIJ40 Adjustable Cylinder SAIJ40BX200-20 FAQ
At an operating pressure of 0.7 MPa, this 40mm bore cylinder provides 879N of push force and 724N of pull force. It reaches a maximum push force of 1130N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 200mm nominal stroke anywhere within a 180-200mm window. It sets the travel end-point but does not lock the load without continuous air pressure.
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