Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-50 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 SAIJ63X85-50
The AirTAC SAIJ63X85-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 35 to 85 mm, allowing you to dial back the nominal stroke by up to 50 mm during commissioning without swapping the unit. It delivers a 0.5 MPa thrust of 1559 N and pull of 1402 N.
Equipped with a 20 mm carbon steel rod and an M16x1.5 thread, it handles side loads well while mating cleanly to standard mechanics. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-50 |
|---|---|
| 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 SAIJ63X85-50
| 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 SAIJ63X85-50 Is Used
End-Position Tuning
Fine-tune the exact retract distance within the 35-85 mm window during machine setup to perfect timing without adding external stopper blocks.
Product Changeover
Quickly adapt the cylinder stroke on packaging lines when switching between different package sizes, using the rear screw to set new limits.
Variable End Stops
Set precise mechanical endpoints for machining or clamping fixtures where the final position must be dialed in on-site.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-50 the Right Cylinder?
Choose this 63 mm bore when 40 mm bore falls short at 628 N push force, or when the 80 mm bore at 2513 N is excessive. The 50 mm adjustment range is ideal for machines requiring variable end-stops or frequent product-size changeovers, replacing fixed-stroke SAI cylinders with live external stops. The rear adjuster acts only as a travel stop; it does not hold loads without live air. For fail-safe holding, use a SAIL or BSAI cylinder. This PT-ported, non-magnet model matches standard ISO 15552 interface dimensions.
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 SAIJ63X85-50 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 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw allows you to mechanically shorten the effective stroke from its 85 mm nominal length down to as little as 35 mm, creating a 50 mm adjustable travel window for precise end-position tuning.
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