Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-30S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 250mm 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
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-30S
The AirTAC SAIJ63X250-30-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 220 to 250 mm, allowing you to dial back the nominal 250 mm stroke by up to 30 mm during commissioning without adding external stops. It delivers a robust 2182 N push force at 0.7 MPa, making it suitable for medium-duty handling tasks.
This variant includes a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and uses PT tapered port threads (G3/8). The extruded aluminum barrel features sensor grooves on both sides, and the integrated magnet (-S) supports position detection via AirTAC CMSE reed or DMSE electronic solid-state switches. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-30S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 250 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 SAIJ63AX250-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×250 | 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 SAIJ63AX250-30S Is Used
Product Changeover Positioning
Quickly dial in the 220-250 mm travel window during format size changes on a packaging line, avoiding the need to physically swap cylinders or reposition hard stops.
End-Stop Commissioning
Fine-tune the retract end position during machine setup to perfectly mate tooling, using the rear adjuster to absorb minor mechanical tolerances without external brackets.
Variable Transfer Stops
Act as an adjustable diverter or stop gate on a conveyor where the exact product resting position needs occasional mechanical adjustment rather than a fixed hard stop.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-30S the Right Cylinder?
Choose this 63 mm bore when your application requires the 2182 N push force (at 0.7 MPa) and demands fine-tuning of the end position on the fly. If you need less force, stepping down to a 50 mm bore yields 1374 N push at 0.5 MPa, while moving up to an 80 mm bore provides 3518 N push at 0.5 MPa. The adjustable stroke is ideal for product changeovers where the exact end-of-stroke varies slightly, saving you from swapping out a fixed-stroke SAI cylinder.
Because this is a 250 mm stroke, you should verify guiding if the load is heavy or off-center, as the 20 mm rod diameter handles side loads better than smaller bores but still requires external support for long unsupported travel. For load-holding without live pressure, this plain SAIJ adjuster is not a lock; you would need to look at the SAIL or BSAI series instead. This model is dimensionally interchangeable per ISO 15552 and uses the SAIJ mounting subset: 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 SAIJ63AX250-30S FAQ
At 0.5 MPa, it provides 1559 N push and 1402 N pull force. At 0.7 MPa, the push force is 2182 N, and the pull force is 2805 N at 0.9 MPa.
The rear adjuster screw lets you shorten the effective travel from the nominal 250 mm down to 220 mm. It acts as a mechanical stop to set the end position precisely but does not lock or hold the load without continuous air pressure.
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