Airtac SAIJ40 Adjustable Cylinder SAIJ40X190-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40X190-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 190mm 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
- Stroke190 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 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 SAIJ40 Adjustable Cylinder SAIJ40X190-20S
The AirTAC SAIJ40X190-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 170 to 190 mm, letting you dial back the nominal 190 mm stroke by up to 20 mm during machine setup. Operating at 0.5 MPa, it delivers 628 N of pull force and 879 N of push force at 0.7 MPa. The extruded aluminum barrel features sensor grooves on both sides, and the integrated magnet (-S) supports electronic DMSE solid-state and CMSE reed switches for precise position feedback.
This model uses a 16 mm carbon steel rod with an M12x1.25 thread and PT tapered ports. The rear adjuster acts purely as a mechanical stop to tune the end position without swapping the cylinder, while the adjustable air cushions at both ends manage deceleration. It is a profile cylinder dimensionally interchangeable per ISO 15552, utilizing a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40X190-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40X190-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 190 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 SAIJ40X190-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×190 | 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 SAIJ40X190-20S Is Used
Machine Changeovers
Fine-tune the 170-190 mm travel window during product size changes without physically swapping the cylinder or bolting on external stoppers.
End-Position Tuning
Dial in the exact retract distance at commissioning using the rear adjusting screw to perfect the mechanical stop for delicate pick-and-place operations.
Variable Stops
Adjust the stroke dynamically on packaging lines where carton sizes vary, using the 20 mm trim range to accommodate different package dimensions.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40X190-20S the Right Cylinder?
Choose this 40 mm bore when your application requires the 628 N pull force at 0.5 MPa, stepping up from a 32 mm bore that offers 345 N of pull force. An adjustable stroke is ideal for product changeovers where the exact end-of-stroke position needs fine-tuning at commissioning without adding external stops. If you need a fixed length, the standard SAI series is the direct alternative, but the SAIJ rear screw saves setup time on variable product lines.
For ISO 15552 replacement matching, this cylinder uses a 40 mm bore, 190 mm stroke, 20 mm adjustment, PT ports, and a -S magnet. The rear adjuster is a travel stop, not a locking device; it will not hold the load without live air pressure. For positive load-holding, consider the SAIL pneumatic lock or BSAI clamp-lock series. With a 190 mm stroke, the 16 mm rod handles moderate side loads, but long unsupported strokes still require an external guide.
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 SAIJ40X190-20S FAQ
At 0.5 MPa operating pressure, the 40 mm bore generates 628 N of pull force and 402 N of push force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster is a mechanical stop that allows you to shorten the effective travel from the nominal 190 mm down to 170 mm. It sets the end position but does not lock the load without live air pressure.
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