Product Overview
This rhombus-shaped PCD diamond insert is engineered for super-hard turning of non-ferrous metals, aluminium and gemstone materials on CNC lathes and machining centres. The polycrystalline diamond cutting edge resists abrasion and maintains a sharp edge far longer than carbide, giving excellent surface finish and tool life.
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Key Features
- Polycrystalline diamond (PCD) edge for super-hard cutting
- Rhombus geometry with multiple cutting corners for economy
- Excellent wear resistance and edge retention on abrasive materials
- Delivers high surface finish on aluminium and non-ferrous alloys
- Multiple ISO styles available (APKT, SEHT, RPGT, CCGT, DCGT, VCGT, CNMG, WNMG)
Typical Applications
- CNC turning of aluminium and non-ferrous metals
- Gemstone and hard brittle material machining
- High-speed finishing and semi-finishing
- Machining centre and CNC lathe operations
Specifications
| Type | Turning Insert |
| Material | Diamond PCD Insert |
| Usage | CNC Lathe Machinery |
| Coating | PCD |
| Hardness | Super hard |
| Model Number | RL-6778 |
| Applicable Machine | Machining Centre, CNC Lathe |
| Available Styles | APKT, SEHT, RPGT, CCGT, DCGT, VCGT, CNMG, WNMG |
Customization and OEM
We supply this product in custom specifications, sizes and batch quantities, with OEM and private-label options available. Send our team your material and finish requirements for a tailored recommendation.
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All items are quoted without a fixed web price to give you accurate, volume-based pricing. Inquire for MOQ, lead time and freight options. All reference sizes shown are nominal and are confirmed on your technical drawing before production.
Why Choose CDFIT
- 20+ Years Manufacturing
Factory-integrated maker and exporter of diamond and CBN superhard tools since 2003.
- ISO 9001 Quality System
Documented material and in-process inspection on every production batch.
- Factory-Direct Pricing
No trading-company mark-up. Buy straight from the source at volume-friendly prices.
- OEM / ODM Custom Tooling
Send a drawing or sample: engineering review, prototyping and batch production.
- Fast Quote & Reply
Spec-based quotation and a reply to every enquiry within 1 business day.
- Global Export Experience
Reliable packing, express / air / sea shipping and full export documentation.
Need a specific size, grit or bond? Request a quote — our engineers will match the right tool to your application.





















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