Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 85mm 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
- Stroke85 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-20
The AirTAC SAIJ63X85-20 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 85 mm stroke with a 20 mm adjustment range, yielding a usable travel window of 65 to 85 mm. This allows you to fine-tune the retract end position at commissioning without adding external stops. Delivering 1559 N of push force at 0.5 MPa, it suits medium-duty tasks.
The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches, though this non-magnet version requires a -S suffix for sensing. The carbon steel rod uses an M16x1.5 thread, and the G3/8 port supports a 30-800 mm/s speed range. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 85 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 SAIJ63X85-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×85 | 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 SAIJ63X85-20 Is Used
Machine Setup Tuning
Dial in the exact 65 to 85 mm retract position during commissioning to perfect part ejection without machining external stoppers.
Product Changeover
Quickly adjust the end-stop on packaging lines when product sizes change, utilizing the 20 mm trim range to accommodate new formats.
Assembly Station End-Stop
Use the 1559 N push force to press components, relying on the rear adjuster to set precise pressing depth for different batches.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-20 the Right Cylinder?
Choose this 63 mm bore when your application requires roughly 1559 N push force at 0.5 MPa, stepping down from the 80 mm bore (2513 N) or up from the 50 mm bore (982 N). The 20 mm rear adjuster is ideal for product changeovers, letting you dial in the exact end-stop without swapping cylinders. For load-holding without live air, note that the rear screw is a travel stop, not a lock; consider an AirTAC SAIL or BSAI cylinder instead. To match this ISO 15552 cylinder, specify bore 63, stroke 85, 20 mm adjust, PT port thread, and no magnet.
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 SAIJ63X85-20 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 318 kgf.
The rear adjuster screw lets you shorten the nominal 85 mm stroke by up to 20 mm, creating a usable travel window of 65 to 85 mm. It acts as a mechanical stop to fine-tune the end position and is not a lock for holding loads without air pressure.
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