Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 85mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-20
The AirTAC SAIJ100X85-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to a 65-85 mm window. Delivering a robust 5497 N push force at 0.7 MPa, it handles heavy loads while utilizing a SUS304 stainless steel rod for superior corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
Equipped with a G1/2 port and M20x1.5 rod thread, this 100 mm bore unit operates at speeds between 30-800 mm/s. The rear adjuster functions strictly as a mechanical stop to set the end position during commissioning; it does not lock the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI variants.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 85 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 | 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 SAIJ100 Adjustable Cylinder SAIJ100BX85-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×85 | 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 SAIJ100BX85-20 Is Used
Product Size Changeovers
Quickly dial in the 65-85 mm travel window during format changes on packaging lines, using the rear adjuster to set new end positions without mechanical rebuilds.
Machine Commissioning
Fine-tune the final retract position during initial setup to perfectly align heavy 100 mm bore tooling, absorbing mechanical tolerances directly at the cylinder.
Variable End-Stop Positioning
Adapt clamping or pressing depths on the fly for different workpieces, relying on the 5497 N push force at 0.7 MPa to secure parts during machining.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-20 the Right Cylinder?
Choose this 100 mm bore cylinder when your application requires substantial thrust, stepping up from a 63 mm bore that provides 2182 N at 0.5 MPa. The 20 mm adjustment range is ideal for product changeovers on a line, allowing you to dial in the exact end-stop without swapping the cylinder or adding external stops. If you need to hold a load statically without continuous air pressure, you must integrate an external pilot-operated check valve or switch to a locking cylinder type.
To match this exact ISO 15552 replacement, verify the 85 mm nominal stroke, 20 mm adjustment code, PT tapered port threads, and the SUS304 (code B) rod material. Because the stroke is under 300 mm, side-load stress on the M20x1.5 rod is manageable, but external guides are still recommended for heavy lateral loads.
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 SAIJ100BX85-20 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the nominal 85 mm stroke by up to 20 mm, creating a usable travel window of 65-85 mm. It allows precise end-position tuning at commissioning without swapping cylinders.
At a 0.7 MPa operating pressure, the SAIJ100X85-20 provides a push force of 5497 N and a pull force of 3681 N. It can deliver a maximum push force of 7068 N at 0.9 MPa.
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