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Mold & Die Manufacturing
Mold and die manufacturers use our diamond and CBN grinding rods for precision bore finishing of mold inserts, die cavities, and ejection pin holes, achieving tight tolerances and excellent surface quality.
Special reminder：This product can be customized in different other size and concentration. The unit in the picture is millimeter.
SinoGrind manufactures precision diamond grinding rods and CBN grinding rods in resin, metal, electroplated, and vitrified bonds. They are cylindrical superabrasive tools for internal, bore, slot, and profile grinding of hard and hardened materials.
Please contact us to get more details.
Selecting the right grinding rod depends on your workpiece material, bore diameter, grinding depth, and required surface finish. Our technical guide helps you choose the optimal abrasive and bond type.
For internal grinding of tungsten carbide dies and hard alloy bushings, diamond grinding rods with resin bond are the industry standard. The self-sharpening resin matrix provides cooler cutting that prevents micro-cracking and thermal damage.
Ceramic and glass bore grinding requires diamond rods with vitrified or resin bond. Vitrified bonds offer higher material removal with open porous structure, while resin bonds deliver superior surface finish.
For internal grinding of hardened steel and tool steel bores, CBN grinding rods are required. CBN is chemically inert to iron and provides excellent thermal stability for high-efficiency ferrous grinding.
For slot grinding and profile grinding requiring accurate geometry, metal bond rods offer maximum durability and form retention. Metal bond rods last longer than resin bond and maintain their profile for high-volume production.
Applications: Mold insert grinding, punch and die grinding, precision component manufacturing
High-production environments benefit from electroplated or vitrified bond rods that combine aggressive stock removal with excellent coolant flow and chip clearance in deep, confined bores.
Industries: Hydraulic cylinder manufacturing, bearing production, automotive components, precision engineering
| Workpiece Material | Recommended Abrasive | Recommended Bond | Grit Size | Concentration |
|---|---|---|---|---|
| Tungsten Carbide | Diamond | Resin | 80/100 - 170/200 | 100-150% |
| Ceramic | Diamond | Vitrified | 100/120 - 230/270 | 75-125% |
| Glass | Diamond | Resin or Vitrified | 100/120 - 200/230 | 75-125% |
| Hardened Steel | CBN | Metal or Vitrified | B91 - B126 | 100-200% |
| Tool Steel | CBN | Resin | B91 - B181 | 100-150% |
| Cast Iron | CBN | Vitrified | B76 - B126 | 100-150% |
Diamond grinding rods are cylindrical superabrasive tools with diamond grains bonded to a rod-shaped steel body. They are used for internal grinding, bore grinding, and slot grinding of non-ferrous hard materials including tungsten carbide, ceramic, glass, quartz, and semiconductor materials.
Resin bond diamond rods provide smooth finishes and cooler cutting on carbide and ceramic bores. Metal bond diamond rods offer maximum rod life and form retention for heavy-duty internal grinding. Electroplated diamond rods deliver aggressive material removal in a single pass. Vitrified bond diamond rods combine high stock removal with self-sharpening performance.
CBN (Cubic Boron Nitride) grinding rods are designed for internal grinding of ferrous materials including hardened steel, tool steel, high-speed steel, and cast iron. CBN offers excellent thermal stability up to 1200°C and chemical inertness to iron, making it the abrasive of choice for steel bore grinding where diamond cannot be used.
Resin bond CBN rods are economical and versatile for tool and cutter internal grinding. Metal bond CBN rods provide the highest strength and longest life for high-production grinding of hardened steel. Vitrified bond CBN rods offer porous, self-sharpening, coolant-friendly performance for precision internal grinding.
The bond is the matrix that holds the diamond or CBN grains on the rod body. It controls rod wear, stock removal, and cooling. SinoGrind manufactures grinding rods in four bond types to match your material and operation.
Resin bond provides smooth finishes and cooler cutting, ideal for precision finishing of carbide and tool steel bores. Metal bond offers the longest rod life and best form retention for heavy-duty production grinding. Electroplated bond uses a single layer of abrasive for the fastest material removal. Vitrified bond is porous and self-sharpening with excellent coolant flow for high stock removal.
Diamond grinding rods are used for non-ferrous hard materials such as tungsten carbide, ceramic, glass, quartz, and semiconductor materials. CBN (Cubic Boron Nitride) grinding rods are designed for ferrous materials including hardened steels, tool steels, high-speed steels, and cast iron. Diamond offers higher hardness but reacts chemically with iron at grinding temperatures. CBN offers excellent thermal stability up to 1200°C and chemical inertness to iron.
SinoGrind grinding rods are available in four bond types: (1) Resin bond for smooth surface finishes and cooler cutting on carbide and ceramic bores. (2) Metal bond for maximum rod life and form retention in heavy-duty internal grinding. (3) Electroplated bond for aggressive material removal with a single abrasive layer. (4) Vitrified bond for cool grinding with high stock removal and self-sharpening performance.
SinoGrind grinding rods are available in custom diameters, typically from 3mm to 30mm, with custom lengths to suit your internal grinding machine and bore depth. The unit in the pictures is millimeter. Please contact us with your bore diameter, grinding depth, workpiece material, and required surface finish for a tailored recommendation.
Standard diamond grinding rods are not recommended for ferrous metals (steel, cast iron) because carbon in diamond reacts with iron at high temperatures, causing rapid rod wear. For steel grinding, use CBN (Cubic Boron Nitride) grinding rods instead. Diamond rods can be used on non-ferrous metals like aluminum, copper, and brass with proper cooling.
Grinding rods are cylindrical superabrasive tools used for internal grinding, bore grinding, slot grinding, and profile grinding. They are essential tools for internal grinding machines and CNC cylindrical grinders. Common applications include precision bore finishing of carbide dies, ceramic components, hardened steel bushings, hydraulic cylinders, mold inserts, and precision bearing races.
Water-soluble coolants or synthetic coolants are recommended for diamond and CBN grinding rods. These coolants provide excellent heat dissipation and chip flushing in the deep, confined bore grinding zone. The coolant flow rate should be sufficient to flood the grinding area. Maintain coolant concentration at 5-8% for optimal performance and rod life.
Mold and die manufacturers use our diamond and CBN grinding rods for precision bore finishing of mold inserts, die cavities, and ejection pin holes, achieving tight tolerances and excellent surface quality.
Precision component manufacturers rely on our grinding rods for internal grinding of hydraulic cylinders, bearing races, valve bodies, and precision bushings in steel, carbide, and ceramic materials.
Automotive and aerospace industries use our grinding rods for high-precision internal grinding of fuel injection components, gears, shafts, and aerospace alloy parts where dimensional accuracy is critical.
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