Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 270mm 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
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-20
The AirTAC SAIJ63X270-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 250-270 mm, allowing you to dial back the 270 mm nominal stroke by up to 20 mm during machine commissioning. This bore size delivers 2805 N of push force at 0.9 MPa and pulls 1402 N at 0.5 MPa.
Equipped with a SUS420J2 stainless steel rod (option A) and PT tapered port threads (G3/8), it handles demanding environments. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches, though this specific SKU is configured without a magnet.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 270 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 SAIJ63AX270-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×270 | 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 SAIJ63AX270-20 Is Used
Machine Setup & Changeover
Fine-tune the end-of-stroke position by up to 20 mm during commissioning to perfectly dial in machine timing without adding external stops.
Variable Product Handling
Adjust the travel window between 250 and 270 mm to accommodate different package sizes on a single conveyor line.
Precision End-Positioning
Use the rear stopper to set exact retract limits for machining or clamping tasks requiring repeatable end-point tuning.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-20 the Right Cylinder?
Choose this adjustable SAIJ over a fixed-stroke SAI when your application requires variable end-stops or product-size changeovers without physically swapping cylinders. If you need higher force, stepping up to the 80 mm bore yields 4523 N of push force at 0.9 MPa; dropping to a 50 mm bore reduces it to 1767 N.
Because the stroke is 270 mm, ensure proper external guiding to prevent excessive rod side-loading. The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure. For fail-safe load holding, consider the SAIL or BSAI series. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ63AX270-20 FAQ
At an operating pressure of 0.9 MPa, this 63 mm bore cylinder provides a push force of 2805 N and a pull force of 2524 N. It operates efficiently at speeds between 30 and 800 mm/s.
The rear adjusting screw acts as an external stopper that lets you shorten the effective stroke from 270 mm down to 250 mm. It decelerates the travel end but does not lock the load without continuous air pressure.
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