Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-50
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-50 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 SAIJ100BX85-50
The AirTAC SAIJ100X85-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 35 to 85 mm. Delivering 7068 N of push force at 0.9 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and features PT tapered ports sized at G1/2.
The external stopper screw allows precise end-position tuning at commissioning without adding external stops. It supports a speed range of 30-800 mm/s and uses the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-50 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-50 |
|---|---|
| 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 SAIJ100BX85-50
| 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 SAIJ100BX85-50 Is Used
Machine Setup & Commissioning
Fine-tune the exact end-of-stroke position during initial machine commissioning without physically swapping the cylinder or bolting on external stopper blocks.
Product Size Changeovers
Quickly dial in the 35-85 mm travel window on packaging lines when processing different product sizes, ensuring precise positioning for each run.
Variable End-Stop Positioning
Adapt the retract stroke dynamically on automated assembly lines to accommodate varying part dimensions while maintaining the high 7068 N push force.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-50 the Right Cylinder?
Select this 100 mm bore when an 80 mm bore (providing 4523 N push at 0.9 MPa) is insufficient for your load, but a 125 mm bore is too large. The 50 mm adjuster is ideal for product changeovers requiring variable end-stops, unlike a fixed SAI cylinder. Because the stroke is under 300 mm, side-load stress is minimal, though long unsupported loads still need a guide.
As an ISO 15552 profile cylinder, it is dimensionally interchangeable with ISO 15552 cylinders such as SMC and Festo equivalents. To match this unit, specify the 100 mm bore, 85 mm stroke, 50 mm adjustment, PT ports, and the B-code SUS304 rod. Note that the rear adjuster is a travel stop, not a lock; for load-holding without live air, use SAIL or BSAI cylinders.
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 SAIJ100BX85-50 FAQ
At 0.9 MPa, the 100 mm bore provides 7068 N of push force and 3681 N of pull force. The maximum thrust is 801 kgf at 1.0 MPa.
The rear adjuster screw acts as a mechanical stop that can trim the nominal 85 mm stroke back by up to 50 mm, creating a usable travel window of 35 to 85 mm. It only sets the travel end and does not lock the load without live air pressure.
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