Lexicon: G
GGG 40 (Cast Iron)
For very high loads guide shoes are made of GGG 40 (cast iron with nodular graphite - also ductile iron). The HSM types GG and HSMLS have the same dimensions as the standard guide shoes out of aluminum (HSM140 and HSML180) but they have much higher tensile strength. Due to the otherwise high inherent weight, the guide holder type WSMEL is out of a special aluminum alloy. To increase the breaking load and to reduce the notch susceptibility, we considered a radius in the shaft of the guide holder.