Attributes

Brand	-
Category	Model / Hobby Parts / Model Making Tools & Supplies
Origin	-
Model Number	JDB-8090
Material Composition	High-Strength Copper Alloy with Integrated Graphite Plugs
Bearing Type	Self-Lubricating Sliding Bearing with Flange
Inner Diameter	80 mm
Outer Diameter	90 mm
Flange Diameter	110 mm
Total Length	60 mm
Operating Temperature	-40°C to +250°C
Load Capacity	High Static and Dynamic Load Resistance
Application Suitability	Ideal for Heavy-Duty Model Machinery and Industrial Prototypes

6 reviews

Anonymous

Mar 22, 2026

Rating: 5/5

Superior self-lubrication

I used this for a high-friction pivot point in a large RC crane model. The self-lubricating feature works flawlessly even under heavy load conditions.

Anonymous

Mar 20, 2026

Rating: 5/5

Perfect fit for my custom gearbox project

The dimensions were exact as described. The graphite inserts provide smooth operation without needing constant oiling, which is great for my scale model engine build.

Anonymous

Mar 20, 2026

Rating: 4/5

Solid performance

Does exactly what it is supposed to do. The finish is clean and there are no burrs on the edges. Took off one star only because shipping took a little longer than expected.

Anonymous

Mar 16, 2026

Rating: 4/5

High quality material, slightly heavy

Excellent construction and the copper alloy feels very durable. It is a bit heavier than plastic alternatives, but that adds to the realism of the final assembly.

Anonymous

Mar 15, 2026

Rating: 5/5

Best bushing in this size range

Hard to find 80mm inner diameter bushings with this specific flange configuration. The graphite integration ensures long life without maintenance.

Anonymous

Mar 05, 2026

Rating: 5/5

Great for industrial prototypes

We ordered several of these for a functional prototype. The flange design made mounting incredibly easy and secure. Highly recommended for serious makers.

5 FAQ

Q: Does this come with mounting screws?

A: No, the bushing is sold as a standalone component. You will need to source appropriate M6 or M8 screws depending on your flange hole alignment.

Q: What is the maximum rotational speed this bearing can handle?

A: For the JDB-8090, we recommend a maximum surface speed of 0.5 m/s for optimal longevity under standard load conditions.

Q: Is this bushing suitable for underwater applications?

A: While the copper-graphite material is corrosion-resistant, this specific model is designed for dry or lightly lubricated environments. For continuous submersion, we recommend checking our marine-grade series.

Q: Can I machine this further if I need a custom outer diameter?

A: Yes, the copper alloy base can be machined. However, please be careful not to remove too much material near the graphite plugs to maintain structural integrity.

Q: Is the graphite safe for use in food-contact modeling machinery?

A: The materials used are non-toxic, but this product is not certified for direct food contact. We advise using a barrier if there is any risk of contamination.

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