Airtac SAUJ100 Adjustable Cylinder SAUJ100X850-20S
The AirTAC Airtac SAUJ100 Adjustable Cylinder SAUJ100X850-20S is a genuine double-acting profile-type standard air cylinder with a Ø100mm bore and 850mm stroke, 1/2" air ports and adjustable end cushioning. Its hard-anodized aluminum-profile barrel is shorter than an ISO 15552 cylinder of the same bore, and it shares SC-series mounting accessories.
- BoreØ100 mm
- Stroke850 mm
- Port size1/2"
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SAUJ100 Adjustable Cylinder SAUJ100X850-20S
The AirTAC SAUJ100X850-20S is a double-acting, single-rod profile cylinder with an on-site adjustable extend stroke. An external stop screw lets you shorten the 850 mm nominal stroke by up to 20 mm, yielding a usable range of 830-850 mm to fine-tune machine positioning without buying a new actuator. It features a 1/2 inch port, an M20x1.5 rod thread, and 29 mm adjustable air cushions at each end. The extruded aluminum profile barrel makes it shorter than an ISO 15552 cylinder of the same bore.
This 100 mm bore class delivers substantial power: 3927 N push and 3681 N pull at 0.5 MPa, scaling to 7068 N push at 0.9 MPa, with a theoretical maximum of 801 kgf at 1.0 MPa. For payload sizing, a safe working load is roughly 2356 N (about 60 percent of the 0.5 MPa push force), translating to a vertical lift capacity of approximately 200 kg with a 2:1 safety margin. The -S suffix indicates a built-in piston magnet for CMSG, DMSG, or EMSG position sensing.
Airtac SAUJ100 Adjustable Cylinder SAUJ100X850-20S Technical Specifications
| Model | Airtac SAUJ100 Adjustable Cylinder SAUJ100X850-20S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø100 mm |
| Stroke | 850 mm |
| Acting type | Double acting |
| Port size | 1/2" |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAU series datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G (BSPP). A high-temperature seal (0-150 °C) is available.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAUJ100 Adjustable Cylinder SAUJ100X850-20S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×850 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAU-family variants: SAUD (double rod), SAUJ (adjustable stroke), SAUF (with built-in solenoid valve), and SAU-S with built-in magnet. Seals: TPU (blank) / Viton H / NBR N. Sensor switches: CMSG / DMSG / EMSG.
Where the Airtac SAUJ100 Adjustable Cylinder SAUJ100X850-20S Is Used
Press Fit Tuning
Allows operators to micro-adjust the 850 mm extend stroke by up to 20 mm to set precise bottoming pressure for pressing bearings or pins without reprogramming the machine cycle.
Variable Length Diverter
Provides an adjustable reject arm stroke on a packaging line, accommodating different carton depths by tweaking the end position via the external stop screw.
Pallet Positioning Stop
Acts as a high-force physical stop for pallets, where the 20 mm trim window fine-tunes the stopping distance based on pallet wear or sensor reflection variances.
Is the Airtac SAUJ100 Adjustable Cylinder SAUJ100X850-20S the Right Cylinder?
When sizing this actuator, compare it against the neighboring 80 mm bore, which provides 2513 N push at 0.5 MPa. If your application requires less force, dropping to the 80 mm bore saves space and air consumption. Conversely, if you need maximum thrust, the 100 mm bore is the largest available in this series. Choose the SAUJ adjustable-stroke variant over a fixed SAU cylinder when you need to dial in the exact extend end-position during machine commissioning or to accommodate product variations without machining external hard stops. Basic, FA flange, and LB foot mountings are available, sharing compatibility with the AirTAC SC series. Because the -S magnet is present, you can directly mount CMSG, DMSG, or EMSG sensors. For this long 850 mm stroke, external guide rails are strongly recommended to prevent rod bending and premature seal wear from side loads. Operating speed ranges from 30-800 mm/s.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/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 — same as SC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAUJ100 Adjustable Cylinder SAUJ100X850-20S FAQ
This 100 mm bore cylinder has a 1/2 inch port and delivers 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, and 7068 N push at 0.9 MPa. The theoretical max force is 801 kgf at 1.0 MPa. The nominal extend stroke is 850 mm, but the external stop screw allows you to shorten it by up to 20 mm on-site, giving a usable extend range of 830-850 mm.
The external stop screw mechanically limits the piston's extend travel to set the exact end position, but it is not a load lock. A plain cylinder does not hold a load if air pressure is lost or the valve is centered; the piston will drift, and the 29 mm air cushions only decelerate the piston near the end of the stroke. To hold a load securely in place, you must use an external rod lock or a pilot-operated check valve.
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