Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 85mm 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
- Stroke85 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40S
The AirTAC SAIJ63X85-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 63 mm bore generating 1559 N of push force at 0.5 MPa, paired with an 85 mm nominal stroke that can be fine-tuned down by up to 40 mm. This yields a highly versatile usable travel window of 45 to 85 mm, letting you set exact retract end positions without adding external stops. The integrated -S magnet enables position detection via AirTAC CMSE reed or DMSE electronic sensors along the dual-side barrel grooves.
This adjustable-stroke design is built on the extruded aluminum SAI profile, meaning it is dimensionally interchangeable with ISO 15552 cylinders. It uses a PT tapered port thread (G3/8) and a 20 mm carbon steel rod with an M16x1.5 thread. The rear adjuster acts purely as a mechanical stop for position tuning and does not hold the load without live air pressure; for load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 85 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 SAIJ63X85-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×85 | 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 SAIJ63X85-40S Is Used
Machine Changeover
Dial in the 45-85 mm retract window during format changes without swapping cylinders or repositioning hard stops.
Variable End-Stop Setup
Use the 40 mm rear adjuster to fine-tune the exact resting position of components at commissioning.
Sensor-Driven Positioning
Leverage the -S magnet with DMSE electronic sensors to confirm adjustable end positions in automated workflows.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40S the Right Cylinder?
Choose this 63 mm bore cylinder when you need moderate thrust (1559 N push at 0.5 MPa) and exact end-position control during commissioning or product changeover. If your application requires less force, the 50 mm bore provides 982 N; if you need more, the 80 mm bore offers 2513 N. The SAIJ63X85-40-S is selected over a fixed SAI cylinder when a variable end-stop is required, allowing you to trim the retract stroke anywhere within the 45-85 mm window. It supports a standard speed range of 30-800 mm/s.
For an exact ISO 15552 replacement, match the 63 mm bore, 85 mm stroke, 40 mm adjustment, G3/8 PT port, and -S magnet. The compatible mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because the stroke is under 300 mm, side-load stress on the 20 mm rod is minimal, though external guides are still recommended for heavy lateral 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw allows you to shorten the 85 mm nominal stroke by up to 40 mm, creating a usable travel window of 45 to 85 mm. The adjuster is a mechanical stop and does not lock the load without air pressure.
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