Attributes

Brand	-
Category	Model / Hobby Parts / Model Making Tools & Supplies
Origin	-
Material	HRB-78 High-Strength Copper Alloy
Hardness	HB 180-220
Surface Finish	Precision Machined (Ra 0.8)
Application	Wear-resistant shaft sleeves and bushings
Customization	Available (OD, ID, Length)
Tolerance	ISO H7/g6 Standard
Origin	Direct Manufacturer Sale
Lead Time	3-5 Days for Stock, 10 Days for Custom
Package	Anti-corrosion Oil + Protective Foam Box
Certification	ISO 9001:2015 Compliant

6 reviews

Anonymous

Mar 30, 2026

Rating: 5/5

Perfect fit for our prototype machinery

Ordered custom sizes for a model making project. The tolerance was spot on, and the HRB-78 material feels incredibly durable. Highly recommend for precision work.

Anonymous

Mar 25, 2026

Rating: 5/5

Support team helped with specs

I wasn't sure about the exact dimensions needed. The support team guided me to the right HRB-78 spec. The final product works flawlessly in my assembly.

Anonymous

Mar 16, 2026

Rating: 4/5

Great quality, slightly long shipping

The copper bushings are excellent quality and machined very smoothly. Only giving 4 stars because the custom order took a day longer than expected, but worth the wait.

Anonymous

Mar 13, 2026

Rating: 5/5

Excellent wear resistance

We use these in high-friction areas of our scale models. After weeks of testing, there is virtually no wear. The surface finish reduces friction significantly.

Anonymous

Mar 08, 2026

Rating: 4/5

Good value for bulk orders

Bought a batch for multiple projects. Consistency across all units was impressive. One unit had a minor burr that was easily filed down, otherwise perfect.

Anonymous

Mar 05, 2026

Rating: 5/5

Professional grade components

As a hobbyist moving into professional prototyping, these parts meet all my needs. The packaging prevented any oxidation during transit. Will buy again.

5 FAQ

Q: Can you machine these bushings to non-standard inner diameters?

A: Yes, we offer full custom machining services. Please provide your specific ID, OD, and length requirements, and we can produce them within 10 days.

Q: What is the minimum order quantity for custom sizes?

A: There is no strict minimum order quantity for custom sizes; however, setup fees may apply for very small batches (under 10 units).

Q: Do you provide technical drawings before production?

A: Absolutely. For custom orders, we will generate and send a PDF technical drawing for your approval before starting the machining process.

Q: What is the maximum operating temperature for HRB-78 copper?

A: HRB-78 alloy typically maintains its mechanical properties up to 200°C (392°F). For higher temperatures, please contact us for alternative material recommendations.

Q: Is this material suitable for underwater applications?

A: Yes, copper alloys like HRB-78 have good corrosion resistance in water. We recommend applying a light protective coat if used in saltwater environments for extended periods.

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