Airtac SAIJ100 Adjustable Cylinder SAIJ100AX850-20S
The AirTAC SAIJ100 Adjustable Cylinder SAIJ100AX850-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 850mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ100 mm
- Stroke850 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 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 SAIJ100 Adjustable Cylinder SAIJ100AX850-20S
The AirTAC SAIJ100X850-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that creates an 830 to 850 mm usable travel window. The extruded aluminum barrel includes sensor grooves on both sides, and because this SKU includes a magnet (-S), it supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise end-of-stroke detection.
This variant uses a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and features a PT tapered port thread. The rear adjustment mechanism acts strictly as a travel stop to fine-tune the retract position during commissioning; it is not a locking device and will not hold a load without live air pressure. For applications requiring true load-holding, consider the SAIL or BSAI series instead.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX850-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX850-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 850 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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, 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | — |
| Max (@1.0 MPa) | 751 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100AX850-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | 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 SAIJ100 Adjustable Cylinder SAIJ100AX850-20S Is Used
Machine Changeovers
Dial in the exact 830 to 850 mm retract position during product size changeovers without physically swapping out the cylinder or adding external stopper blocks.
Automated End-Stops
Set variable end-stops on a long-stroke assembly line, using the integrated -S magnet and DMSE electronic sensors to confirm the adjusted retract position.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX850-20S the Right Cylinder?
If your force requirements are lower, stepping down to an 80 mm bore yields 4523N at 0.9 MPa, whereas stepping up to a 125 mm bore provides 11045N. The adjustable stroke is ideal for machine changeovers, allowing you to dial in the exact retract distance without swapping the cylinder or adding external stops.
When replacing an ISO 15552 cylinder, match the 100 mm bore, 850 mm stroke, 20 mm adjustment range, PT port thread, and -S magnet requirement. Because the 850 mm stroke is long, the 25 mm rod diameter provides rigidity, but an external guide is strongly recommended to prevent excessive side-loading on the unsupported piston rod. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, 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 SAIJ100 Adjustable Cylinder SAIJ100AX850-20S FAQ
The rear adjuster screw allows you to shorten the nominal 850 mm stroke by up to 20 mm, creating a usable travel window of 830 to 850 mm. This mechanism acts as a travel stop to fine-tune the end position and does not lock or hold the load without continuous air pressure.
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