Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-30
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 850mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke850 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-30
The AirTAC SAIJ50X850-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 820 to 850 mm, allowing you to dial back the nominal 850 mm stroke by up to 30 mm during commissioning. Delivering 982 N of push force at 0.5 MPa, it handles mid-range automation tasks effectively.
This unit uses a SUS420J2 stainless steel rod for enhanced corrosion resistance and features PT tapered port threads (G1/4). The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. Note that the rear adjuster functions strictly as a travel stop to set end positions, not as a locking device to hold loads without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-30 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 850 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | 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 SAIJ50 Adjustable Cylinder SAIJ50AX850-30 Is Used
Machine Changeover
Dial in the 820-850 mm travel window during product size changes without adding external physical stops to the machine frame.
Variable End Stops
Set precise retraction limits on long-stroke conveyor sorting arms to accommodate varying package dimensions on the fly.
Commissioning Calibration
Fine-tune the final end-of-stroke position during initial machine setup to perfectly time the 982 N push force without cylinder removal.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-30 the Right Cylinder?
Choose this 50 mm bore cylinder when an application requires precise end-position tuning without swapping out physical components. If your setup needs less force, the 40 mm bore offers 628 N push at 0.5 MPa; for heavier loads, stepping up to the 63 mm bore yields 1559 N. The adjustable rear stop is ideal for product changeovers, whereas a fixed-stroke SAI cylinder is better for repetitive, single-depth operations.
Because the 850 mm stroke is quite long, an external guide is strongly recommended to prevent excessive side-loading on the rod. For applications requiring true load-holding without continuous air pressure, consider the SAIL or BSAI series instead of relying on the SAIJ adjuster. This model operates at speeds of 30-800 mm/s and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ50 Adjustable Cylinder SAIJ50AX850-30 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. It can reach up to 1767 N push at 0.7 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from 850 mm down to as little as 820 mm. It sets the end position but does not lock the load without live air pressure.
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