Ukunemba kokuthwala kuqukethe ukunemba kanye nokujikeleza kokunemba kokulinganisa ubukhulu ukunemba kuyiphrojekthi efakwa kuma-shafts, kufaka phakathi ububanzi bangaphakathi, ububanzi bangaphandle, ububanzi, ukubekezelelana kosayizi we-chamfer noma inani elivunyelwe. Ukunemba kwejiyometri kufaka phakathi ukuphambuka kobubanzi, ukuphambuka kobubanzi bangaphakathi obujwayelekile, ukuphambuka kobubanzi bangaphandle kohlangothi, ukuphambuka kobubanzi bendandatho yobubanzi obujwayelekile endizeni eyodwa ye-radial. Ukunemba kokujikeleza kuyi-Pendulum ejikelezayo, kufaka phakathi indandatho yangaphakathi kanye nokujikijela kwe-radial yendandatho yangaphandle kanye nokugeleza kwe-axial, Uhlangothi lwendandatho yangaphakathi kanye nobubanzi bokubekezelelana kobubanzi bangaphandle. Ibanga lokunemba kokuthwala kusukela ebangeni elijwayelekile 0 kuya ku-6, 5, grade 4 kanye ne-grade 2, ngokulandelana, ngezansi kuqhathaniswa kwethebula phakathi kweklasi ye-preeision ye-china GB 307 kanye nezinye izinga lokunemba. Ibanga lokunemba kokuthwala elikhulu livela ebangeni lesi-6, 5, 4 kanye nele-2 lamazinga amane. 

Indandatho yangaphandle 11, indandatho yangaphakathi 12, kanye nebhola 13 okuyizingxenye ezithwele yi-0.95 mass% noma ngaphezulu kanye ne-1.10 mass% noma ngaphansi kwe-carbon, i-0.05 mass% noma ngaphezulu kanye ne-0.3 mass% silicon, i-0.10 mass% noma ngaphezulu kanye ne-0.50 mass% 11 A yemigwaqo yangaphandle yendandatho kanye ne-12 A yemigwaqo yangaphakathi yendandatho okuyingaphezulu elakhiwe ngensimbi equkethe i-manganese elandelayo, i-1.30 mass% noma ngaphezulu, kanye ne-2.00 mass% noma ngaphansi, futhi yakhiwe ngensimbi equkethe insimbi esele kanye nokungcola, kanye nokuxhumana nezinye izingxenye. Futhi ukuhlushwa kwe-nitrogen okumaphakathi ezindaweni ezingaphansi kwezingqimba zomhlaba 11B, 12B, kanye no-13B okuyizindawo ezingaphakathi kokujula okungu-20 μm ukusuka ebusweni obugoqa ibhola 13A kungu-0.2% ngobuningi noma ngaphezulu kanye no-0.7% ngobuningi noma ngaphansi, kanti ezindaweni ezingaphansi kwezingqimba zomhlaba 11B, 12B, 13B, ama-carbide ama-5 noma ngaphezulu anobubanzi obungu-0.5 micrometer noma ngaphansi akhona ku-100 micrometer.