Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX170-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX170-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 170mm 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
- Stroke170 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX170-20
The AirTAC SAIJ63X170-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 170 mm stroke that can be fine-tuned backward by up to 20 mm, yielding a highly versatile usable travel window of 150 to 170 mm. Operating at 0.5 MPa, it delivers 1559 N of push force and 1402 N of pull force, making it well-suited for mid-range actuation tasks.
This specific unit is configured with a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and features PT tapered port threads (G3/8). The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic solid-state switches. Remember that the rear adjuster acts purely as a travel stop for end-position tuning and does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX170-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX170-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 170 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 SAIJ63AX170-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×170 | 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 SAIJ63AX170-20 Is Used
Commissioning End-Stop Tuning
Dial in the exact retract position within the 150-170 mm window during initial machine setup without machining new stopper blocks.
Product Size Changeover
Quickly adjust the cylinder's effective travel to accommodate different product lengths on a packaging line.
Variable Positioning
Set precise end-of-stroke limits for mid-range force applications requiring up to 1559 N of push force at 0.5 MPa.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX170-20 the Right Cylinder?
Choose this 63 mm bore when you need more thrust than the 50 mm class (which offers 982 N push at 0.5 MPa) but want to avoid the larger footprint of an 80 mm cylinder. The adjustable stroke is ideal for machine commissioning or product changeover, allowing you to dial in the exact end-of-stroke position within the 150-170 mm window without swapping out the cylinder or adding external mechanical stops. For fixed-travel applications without this setup flexibility, the standard SAI cylinder is the alternative.
When replacing an ISO 15552 cylinder, match these exact parameters: 63 mm bore, 170 mm stroke, 20 mm adjustment range, PT G3/8 port threads, and no magnet. Because the 170 mm stroke is relatively short, side-load concerns are minimal, but long unsupported strokes still require an external guide. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR. If your application requires true load-holding without live air, look to the SAIL or BSAI series 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 SAIJ63AX170-20 FAQ
At an operating pressure of 0.5 MPa, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. At the maximum pressure of 1.0 MPa, it can deliver up to 318 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 20 mm from the nominal 170 mm, providing a usable travel window of 150 to 170 mm. The adjuster acts as a mechanical stop for end-position tuning and does not lock or hold the load without continuous air pressure.
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