Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 325mm 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
- Stroke325 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75S
The AirTAC SAIJ63X325-75-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 250-325 mm usable travel window, allowing you to dial back the 325 mm nominal stroke by up to 75 mm during commissioning. It delivers 1559 N of pull force at 0.5 MPa and uses a PT tapered port.
This unit includes a standard magnet for position sensing with CMSE reed or DMSE electronic switches. The piston rod is SUS420J2 stainless steel, and the extruded aluminum barrel incorporates sensor grooves on both sides. The rear adjuster acts purely as a mechanical stop for end-position tuning and does not hold the load without live air.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 325 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 SAIJ63AX325-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×325 | 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 SAIJ63AX325-75S Is Used
Variable End-Stop Tuning
Dial in the exact retraction point within the 250-325 mm window during machine setup without changing the cylinder.
Product Changeover
Quickly adapt the stroke length on a packaging line when switching to a different carton or product size.
Fixture Positioning
Fine-tune the clamping distance on machining fixtures to accommodate varying part thicknesses accurately.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75S the Right Cylinder?
Choose this 63 mm bore when a 40 mm bore (528 N pull at 0.5 MPa) is too weak but an 80 mm bore (2268 N pull) is oversized. The 75 mm adjustment range is ideal for product-size changeovers, eliminating the need to swap cylinders or bolt on external stops. For load-holding without live air pressure, select the SAIL or BSAI series instead, as this adjuster is not a lock.
To match this ISO 15552 interchangeable cylinder, specify a 63 mm bore, 325 mm stroke, 75 mm adjustment, PT G3/8 port, and a -S magnet. Because the 325 mm stroke is long, the 20 mm rod diameter carries side loads well, but an external guide is recommended for unsupported lengths to prevent rod bending.
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 SAIJ63AX325-75S FAQ
The rear adjuster screw lets you shorten the 325 mm nominal stroke by up to 75 mm, providing a 250-325 mm travel window. It functions as a mechanical stop for end-position tuning and is not a lock.
At 0.5 MPa it provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.