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Home / Other Machinery & Hardware (New) / Mold Accessories Manufacturer Precision Graphite Copper Sleeve Oil-Impregnated Bushing/Oil Groove Copper Sleeve Copper Bushing/Composite Sleeve

Attributes

Brand -
Category Hardware & Tools / Other Machinery & Hardware (New)
Origin -
Material Composition High-density graphite infused with SAE 660 bronze
Lubrication Type Self-lubricating oil-impregnated core
Operating Temperature Range -40°C to +250°C
Maximum Load Capacity Up to 15,000 PSI static load
Friction Coefficient 0.05 - 0.15 (dynamic)
Manufacturing Tolerance ISO IT7 precision grade
Surface Finish Ra 0.8 µm polished inner diameter
Oil Groove Pattern Customizable spiral or diamond configuration
Application Environment Suitable for dry, dusty, or high-vacuum conditions
Certification Standards RoHS compliant and ISO 9001 certified production

6 reviews

A

Anonymous

Mar 30, 2026

Rating: 4/5

Great durability under heat

These bushings handle the thermal expansion in our die-casting operations very well. The only reason for 4 stars instead of 5 is that the lead time was slightly longer than expected, but the quality makes up for it.

A

Anonymous

Mar 27, 2026

Rating: 5/5

Excellent technical support

We needed a custom oil groove pattern for a specific application. The manufacturer worked closely with our engineering team to deliver a bespoke solution that performed flawlessly during testing.

A

Anonymous

Mar 26, 2026

Rating: 5/5

Eliminated sticking issues

Previously, we had frequent sticking issues with guided ejection plates. After installing these oil-impregnated composite sleeves, the movement is smooth and consistent even after millions of cycles.

A

Anonymous

Mar 17, 2026

Rating: 5/5

Cost-effective long term

While the unit price is higher than standard bronze bushings, the extended service life and elimination of external lubrication systems make these much more cost-effective over the year.

A

Anonymous

Mar 10, 2026

Rating: 4/5

Solid performance for heavy loads

Using these in a heavy-duty stamping press. They hold up well under significant lateral pressure. The graphite content provides just enough lubrication without attracting too much debris.

A

Anonymous

Mar 01, 2026

Rating: 5/5

Perfect fit for our injection molds

We replaced our standard brass bushings with these graphite copper sleeves in our high-cycle injection molding machines. The self-lubricating feature has significantly reduced our maintenance downtime. Precision is exactly as specified.

5 FAQ

Q: Can these bushings be used in food-grade packaging machinery?

A: Yes, provided the specific alloy meets FDA requirements for incidental contact. Please contact our sales team to request our food-grade certified variant which uses NSF-approved lubricants.

Q: What is the recommended shaft hardness when pairing with this sleeve?

A: We recommend a shaft hardness of at least 50 HRC to prevent galling and ensure optimal wear life for the graphite-copper composite material.

Q: How does the oil impregnation work over time? Does it run out?

A: The porous graphite structure acts as a reservoir. As friction generates heat, microscopic amounts of oil are released to the surface. Once the machine cools, the oil is re-absorbed. This cycle continues for the life of the part under normal operating conditions.

Q: Do you offer custom sizes if our mold design requires non-standard dimensions?

A: Absolutely. We specialize in custom manufacturing. Please provide your CAD drawings or detailed dimension sheets, and our engineering team will provide a quote within 48 hours.

Q: Are these suitable for underwater or submerged applications?

A: While they are oil-impregnated, continuous submersion in water can eventually displace the internal lubricant. For submerged applications, we recommend our specialized marine-grade composite sleeves with sealed ends.

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