Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-20 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 SAIJ50AX850-20
The AirTAC SAIJ50X850-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 850mm stroke with an adjustable travel window of 830-850mm, allowing you to dial back the end position by up to 20mm during commissioning. Delivering 982N of push force at 0.5MPa, it handles substantial workloads while maintaining a standard ISO 15552 mounting footprint.
This model features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance. It uses PT tapered port threads and includes variable air cushions at both ends. The extruded aluminum barrel integrates sensor grooves on both sides, ready for CMSE reed and DMSE electronic switches if a magnet is added later.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-20 |
|---|---|
| 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 SAIJ50AX850-20
| 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 SAIJ50AX850-20 Is Used
Machine Changeover
Fine-tune the 830-850mm travel window during product size changes to set new retract endpoints without physically replacing the cylinder.
End-Position Calibration
Dial in the exact end-of-stroke position at commissioning using the 20mm rear adjuster, eliminating the need for external mechanical stops.
Extended Travel Assembly
Utilize the 850mm stroke for long-throw material handling tasks, relying on the double-cushion system to decelerate the load smoothly.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-20 the Right Cylinder?
Choose this 50mm bore when your application requires 982N of push force at 0.5MPa. If you need less force, the 40mm bore offers 628N; for more power, the 63mm bore provides 1559N. The adjustable stroke is ideal for machine changeovers, letting you fine-tune the retract position without swapping cylinders or adding external stops.
Because the stroke is 850mm, an external guide is recommended to prevent excessive side-loading on the 20mm rod. The rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider the SAIL or BSAI series. This cylinder uses the SAIJ mounting subset: Basic, FA, LB, TC, FTC, TCM1, 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 SAIJ50 Adjustable Cylinder SAIJ50AX850-20 FAQ
At 0.5MPa operating pressure, the 50mm bore provides 982N of push force and 825N of pull force. It can reach up to 1767N of push force at 0.7MPa.
The rear adjuster screw allows you to shorten the effective travel from the nominal 850mm down to 830mm, giving an 830-850mm window. It functions as a physical stop and does not lock the load without continuous air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.