Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-50S 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 SAIJ40BX200-50S
The AirTAC SAIJ40X200-50-S is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, letting you dial back the nominal 200 mm travel by up to 50 mm. This creates a usable 150-200 mm end-position window for fine-tuning at commissioning without swapping the hardware. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
This variant features a SUS304 stainless steel rod for corrosion resistance and includes a magnet for position sensing. The extruded aluminum barrel has sensor grooves on both sides, accepting AirTAC CMSE reed and DMSE electronic switches. The rear adjuster acts purely as a travel stop to set deceleration; it does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-50S |
|---|---|
| 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 SAIJ40BX200-50S
| 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 SAIJ40BX200-50S Is Used
Machine Changeover
Dial the stroke from 200 mm down to 150 mm during product size changes, setting new end positions rapidly without replacing the cylinder.
End-Position Tuning
Fine-tune the retract end-stop during commissioning to perfect part ejection, using the rear screw to trim travel within the 50 mm window.
Assembly Positioning
Provides 628 N of push force at 0.5 MPa for pressing or locating components, with a SUS304 rod for corrosive or wash-down environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-50S the Right Cylinder?
Choose this 40 mm bore when an application requires 628 N push force at 0.5 MPa, stepping up from a 32 mm bore (402 N) for heavier pushing, or down from a 63 mm bore (1559 N) to save space and air. The 50 mm adjustment range is ideal for product changeovers on a line, allowing variable end-stops without adding external stops. For fixed travel without commissioning tweaks, use the standard SAI cylinder instead.
As an ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders. To match this configuration, specify the 40 mm bore, 200 mm stroke, 50 mm adjustment, PT G1/4 port, SUS304 (B) rod, and -S magnet. Since the 200 mm stroke is below the 300 mm threshold, side-load stress is moderate, but the M12x1.25 rod thread still requires external guiding for heavy lateral loads. For load-holding without live pressure, use an SAIL or BSAI 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 SAIJ40BX200-50S FAQ
The rear adjuster screw lets you shorten the effective travel by up to 50 mm, providing a usable stroke window of 150-200 mm. It acts as a mechanical stop to set the end position and does not lock or hold the load without continuous air pressure.
At 0.5 MPa operating pressure, it generates 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, the push force increases to 1130 N.
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