Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 140mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ63 mm
- Stroke140 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-40S
The AirTAC SAIJ63X140-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 1559 N push force at 0.5 MPa and features a 140 mm nominal stroke that can be fine-tuned down by up to 40 mm, yielding a precise 100-140 mm usable travel window. This built-in adjustability allows you to dial in the retract end position during commissioning without adding external stops.
This specific configuration includes a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance and a built-in magnet (-S) for position sensing. It operates at speeds of 30-800 mm/s and uses a PT G3/8 port. The extruded aluminum barrel includes sensor grooves on both sides, seamlessly accommodating AirTAC CMSE reed and DMSE electronic solid-state switches.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 140 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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, 36 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×140 | 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-40S Is Used
Product Changeovers
Quickly adjust the 100-140 mm travel window to accommodate different product lengths on a packaging line without swapping hardware.
End-Position Tuning
Fine-tune the retract stop during machine commissioning to achieve exact clamping or pressing depths, avoiding costly mechanical shimming.
Variable End Stops
Use the 40 mm adjustment range to vary the retract position dynamically for automated assembly stations requiring flexible spacing.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-40S the Right Cylinder?
Choose this 63 mm bore when an application requires more thrust than a 50 mm cylinder (which provides 982 N push at 0.5 MPa) but does not warrant the bulk of an 80 mm unit (2513 N). The adjustable stroke is ideal for machine setups requiring frequent product changeovers, allowing you to shift the end-stop by up to 40 mm on the fly. For fixed-position tasks without variance, a standard SAI cylinder is sufficient. When replacing an ISO 15552 cylinder, match the 63 mm bore, 140 mm stroke, 40 mm adjustment, PT G3/8 port, and the -S magnet requirement.
Because the nominal stroke is 140 mm, side-load risks are moderate, but always ensure adequate external guiding for optimal seal longevity. Remember that the rear adjuster acts strictly as a travel stop to set deceleration, not as a locking device; the cylinder cannot hold a load without live air. For true load-holding without pneumatic pressure, consider an AirTAC SAIL or BSAI series cylinder instead.
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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-40S FAQ
The rear adjuster acts as a mechanical stop that shortens the effective stroke. For this model, the 140 mm nominal stroke can be trimmed back by up to 40 mm, providing a usable travel window of 100-140 mm.
At 0.5 MPa operating pressure, the SAIJ63X140-40-S provides 1559 N of push force and 1402 N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 318 kgf.
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