Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 155mm 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
- Stroke155 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20
The AirTAC SAIJ63X155-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 135 to 155 mm, allowing you to dial back the nominal 155 mm stroke by up to 20 mm during commissioning. Delivering 1559 N of push force at 0.5 MPa, it fits perfectly into mid-range pneumatic setups requiring precise end-position tuning without external stops.
This variant uses a SUS420J2 stainless steel rod for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches. Remember that the rear adjuster acts only as a travel stop for deceleration, not a load-holding lock.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 155 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 SAIJ63AX155-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×155 | 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 SAIJ63AX155-20 Is Used
Product Changeover Adjustment
Quickly fine-tune the 135-155 mm travel window on packaging lines when switching to a different carton size, eliminating the need to physically swap cylinders.
Machine Setup Calibration
Dial in the exact retract end-stop during initial commissioning to perfect the seating force of a 1559 N pressing operation.
Variable End-Stop Positioning
Provide a adjustable physical stop for actuators that need to accommodate minor mechanical variations or sensor drift over time.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20 the Right Cylinder?
Choose this 63 mm bore when an 80 mm bore (2513 N at 0.5 MPa) is excessive, but a 50 mm bore (982 N at 0.5 MPa) lacks the required push force. The adjustable stroke is ideal for machine changeovers where the exact end-of-stroke position varies slightly by product size, saving you from swapping out a fixed-stroke SAI cylinder. For strokes of 155 mm, the 20 mm rod thread handles standard side loads adequately, but longer unsupported strokes would require an external guide.
When ordering, confirm the 63 mm bore, 155 mm stroke, 20 mm adjustment range, PT G3/8 port, and SUS420J2 rod material. Mounting options include the SAIJ subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because this is a double-acting cylinder, it will not hold position without live air pressure; for true load-holding requirements, consider 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 SAIJ63AX155-20 FAQ
The rear adjuster screw lets you shorten the effective travel from 155 mm down to 135 mm. It acts as a mechanical stop to set the retract end-position without changing the cylinder itself.
At 0.5 MPa operating pressure, the 63 mm bore provides 1559 N of push force and 1402 N of pull force. It can deliver up to 2805 N at 0.7 MPa.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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