Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 900mm 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
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-20S
The AirTAC SAIJ63X900-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a carbon steel piston rod and a PT tapered port thread. Because this is a non-standard 900mm stroke, it provides an extended reach while retaining the standard 63mm bore footprint. The built-in rear adjustment screw allows you to fine-tune the effective travel window down to 880mm without adding external stops.
Fitted with a magnet (-S), this unit supports AirTAC CMSE reed and DMSE electronic sensors mounted directly into the dual-side barrel grooves. It delivers a 1559N pull force at 0.5MPa and operates at speeds of 30-800mm/s. The rear adjuster acts purely as a travel stop for end-position tuning and does not lock the load; for position holding without live air, consider the SAIL or BSAI series.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 900 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 SAIJ63X900-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×900 | 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 SAIJ63X900-20S Is Used
Long-Reach Position Tuning
Dial in the exact 880-900mm end-stop on extended-stroke machinery without installing bulky external physical stops.
Product Changeover
Quickly adjust the retract position by up to 20mm on packaging lines when handling different carton or package sizes.
Extended Assembly Pressing
Apply up to 1559N of pull force at 0.5MPa over a long travel distance for component seating and joining tasks.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-20S the Right Cylinder?
Choose this adjustable-stroke model when you need to dial in a precise end-of-stroke position during machine commissioning or product changeover, avoiding the need to physically swap out a fixed-stroke SAI cylinder. If your application requires less force, stepping down to a 50mm bore yields a 825N pull at 0.5MPa. Conversely, an 80mm bore provides 2268N if your load demands more thrust.
When replacing an ISO 15552 cylinder, match the 63mm bore, 900mm stroke, 20mm adjustment, PT port, and the -S magnet. Because the 900mm stroke is long and unsupported, you must use an external guide rail to prevent excessive rod side-loading. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR brackets.
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 SAIJ63X900-20S FAQ
At 0.5MPa operating pressure, this 63mm bore cylinder provides a push force of 1559N and a pull force of 1402N. It can reach a maximum push force of 2805N at 0.9MPa.
The rear adjuster screw lets you shorten the effective travel from 900mm down to 880mm. It functions as a mechanical stop for end-position tuning during setup and does not lock the load without live air pressure.
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