Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 35mm 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
- Stroke35 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20
The AirTAC SAIJ63X35-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 35 mm stroke that can be fine-tuned backward by up to 20 mm, creating a precise 15-35 mm usable travel window. This bore delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it robust for mid-size actuation.
This specific SKU is built with an SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance over the standard carbon steel. It uses PT tapered port threads (G3/8) and lacks a piston magnet, meaning it relies on external proximity switches rather than internal CMSE or DMSE sensors. The extruded aluminum barrel includes sensor grooves on both sides should your application later require a magnet-equipped variant.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 35 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 SAIJ63AX35-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×35 | 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 SAIJ63AX35-20 Is Used
Position Calibration
Fine-tune the 15-35 mm travel window during machine commissioning to hit exact mechanical stops without machining external spacers.
Product Changeover
Quickly adapt the rear stroke stop on packaging lines when switching to a slightly shorter product format, saving setup time.
Clamping Force
Delivers 1402 N of pull force at 0.5 MPa to secure workpieces, with the stainless rod offering resilience in mildly humid environments.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20 the Right Cylinder?
Choose this 63 mm bore when a 40 mm bore (628 N push at 0.5 MPa) is insufficient and an 80 mm bore (2513 N push) is physically oversized. The integrated rear adjuster is selected over a fixed SAI cylinder when you need to dial in the exact end-of-stroke position at commissioning or during product changeover without swapping the physical cylinder.
Because the 35 mm stroke is well under the 300 mm threshold, side-loading risks are minimal, though the 20 mm stainless steel rod and M16x1.5 thread still handle standard guide loads well. Remember that the rear adjuster is strictly a travel stop, not a locking device; it will not hold the load without live air pressure. For true load-holding, select an SAIL or BSAI cylinder. To replace this unit with another ISO 15552 brand, match the 63 mm bore, 35 mm stroke, 20 mm adjustment, PT G3/8 ports, and Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting interface.
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 SAIJ63AX35-20 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 the maximum 1.0 MPa pressure, it can deliver up to 318 kgf of push force.
The rear adjuster acts as an external stopper that lets you shorten the 35 mm nominal stroke by up to 20 mm, resulting in a 15-35 mm usable travel window. It allows end-position tuning without changing the cylinder itself, but it does not lock the load without continuous air pressure.
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