What kind of cutting disc is suitable for cutting silicon carbide bushings?

Silicon carbide (SiC) bushings are high‑hardness engineering ceramics with Mohs hardness of 9.0‑9.5, second only to diamond. Ordinary aluminum‑oxide or conventional silicon‑carbide grinding wheels cannot machine SiC efficiently, and often cause chipping, cracks and scrap parts. Diamond cutting discs are mandatory for SiC bushing cutting.

Selection of Binder Type

Moresuperhard supplies metal‑bonded and resin‑bonded diamond cutting discs optimized for hard‑brittle SiC ceramics, covering rough cutting, slotting, finish cut‑off for SiC bushings.

Metal‑bonded diamond cutting discs

Best for rough cutting, slotting and thick‑wall SiC bushings.

Features: Strong grit retention, outstanding wear resistance, good self‑sharpening performance and high impact resistance. Suitable for heavy‑duty, mass‑production operations with long service life.

Application: Rough cut of SiC blanks, slotting, thick‑wall bushing machining.

Resin‑bonded diamond cutting discs

Ideal for fine cutting and finished‑product cut‑off of SiC bushings.

Features: Good elasticity and fracture toughness to absorb cutting shock, effectively reduce exit‑side chipping. It delivers smooth cutting and superior cross‑section surface finish.

Application: Thin‑wall bushings, finished‑part cutting where edge quality and yield are critical.

Tip: Choose metal bond for rough machining focusing on efficiency and tool life. Choose resin bond for finish machining to minimize chipping. Moresuperhard provides custom solutions on grit size, concentration and dimensions for special working conditions.

Key Points of Processing Technology

Even premium diamond discs will fail without proper processing parameters, resulting in diamond thermal degradation and thermally induced cracks on SiC workpieces.

1. Wet cutting is requiredApply sufficient water‑based coolant or water‑soluble cutting fluid all the time. Coolant removes frictional heat, prevents thermal phase transformation of diamond grits, and avoids thermal‑stress cracks on SiC parts. Dry‑cutting is not allowed.
2. Recommended linear speed & feed rateMaintain linear speed at 25‑35 m/s, combined with small feed rate. High linear speed plus low feed reduces cutting force, improves cross‑section finish and suppresses chipping risk.
3. Machine requirementMinimize spindle run‑out and ensure machine rigidity. Dress new cutting discs before formal cutting for sharp cutting performance.

Moresuperhard Advantages

Moresuperhard (More SuperHard) specializes in superabrasive tools and provides complete cutting solutions for advanced ceramics such as SiC, AlN and alumina.

• High‑grade synthetic diamond grains with optimized bond formula to balance grit retention and self‑sharpening capability.
• Full customization on outer diameter, thickness, bore size, diamond grit and concentration for different cutting machines.
• Field‑proven on SiC ceramic bushings and rings, balancing cutting efficiency, tool life and finished‑part yield.
• Application support including process parameter suggestions to solve common pain points: chipping, slow cutting and excessive tool wear.

If you face challenges like heavy chipping, short tool life or poor surface quality when cutting SiC bushings, contact Moresuperhard for tailored cutting‑disc selection and technical support.