Bakelite/aluminum or Bakelite/graphite bodies are elastic and tend to dampen vibrations from the grinding system [METZ86, p. 63, SEXT82]. This body type is connected to the abrasive layer by direct pressing without glueing [METZ86, p. 63]. Bakelite graphite or glass fiber reinforced resins can be pre-pressed to blanks and have the advantages of being light [METZ86, p. 62].
A common body material is a phenolic resin with a large amount of aluminum powder [SIOU80, VANP39]. The proportion is 25 V% or less of resin and 75 V% or more of metallic powder. The mixture is hot pressed in a mold at temperatures of around 160 °C [VANP39]. Sioui and Carver [SIOU80] introduced enhancements of powder metallic bodies, such as incorporating iron powder together with aluminum and a bonding aid (resin, tin, or zinc) into the hot pressed body. In addition to enhancing bond strength, thermal expansion, thermal conductivity, and turning characteristics, the retention on magnetic chucks is optimized for this material [SIOU80].
Thermal conductivity of phenol aluminum is more than 100 times better than bakelite [NOTT79]. In fact, the temperatures of the abrasive layer on phenol aluminium bodies is always lower than on bakelite bodies. As consequence, grinding wheels with bakelite bodies showed lower G-ratios for dry grinding of carbides [NOTT79].