Description
Reviews
| 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 |
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.
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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