Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 850mm 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
- Stroke850 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-50S
The AirTAC SAIJ63X850-50-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. Equipped with a magnet for position sensing, it operates reliably with CMSE reed and DMSE solid-state switches. The integrated rear stopper allows you to dial back the 850 mm nominal travel, creating an 800-850 mm usable window to perfectly tune end positions during commissioning.
Delivering 2182 N of push force at 0.7 MPa, this 63 mm bore unit uses a G3/8 port and a 20 mm carbon steel rod with M16x1.5 threading. It features variable air cushions at both ends to decelerate the load, while the extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 850 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 SAIJ63X850-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×850 | 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 SAIJ63X850-50S Is Used
Machine Changeover
Dial in the 800-850 mm travel window during product size transitions without replacing the cylinder or repositioning external hard stops.
Variable End Stops
Fine-tune the retract position on extended-length sorting and pushing mechanisms to adapt to varying package dimensions on the fly.
Commissioning Tuning
Use the 50 mm rear screw adjustment to precisely set the exact end-of-stroke position during machine build and initial setup.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-50S the Right Cylinder?
Choose this adjustable-stroke model when your machine setup requires precise end-position tuning or frequent product changeovers without physically swapping cylinders or adding external stops. The 50 mm adjustment window is ideal for accommodating minor variations in part sizes on a line. If your application needs slightly less force, stepping down to a 50 mm bore yields 1374 N of push at 0.5 MPa; for heavier loads, an 80 mm bore provides 3518 N.
Because the nominal stroke is 850 mm, the long unsupported piston rod is susceptible to side-loading; an external guide is recommended to prevent premature wear. Note that the rear adjuster and air cushions act only as travel stops and deceleration devices—they do not hold the load without live air pressure. For true load-holding, consider the SAIL or BSAI series. This SAIJ variant supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ63X850-50S FAQ
At 0.7 MPa operating pressure, this 63 mm bore cylinder provides 2182 N of push force and 1402 N of pull force. The maximum thrust is 318 kgf at 1.0 MPa.
The rear adjuster acts as an external stopper that shortens the effective travel by up to 50 mm. This creates a usable stroke window of 800 to 850 mm, allowing you to fine-tune the end position without altering the standard ISO 15552 mounting dimensions.
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