Menene girman harsashi?

	Lokacin zabar sukudireba mara igiyar waya, mai yuwuwa ka ci karo da kalmar "girman chuck". Girman Chuck ba shine girman duka chuck ba, yana nufin mafi girman diamita na shank wanda chuck zai iya karɓa.
Menene diamita na shank?
	Diamita na shank shine ma'auni a tsakiyar bit shank. Yana ƙayyade idan za ku iya amfani da ɗan ƙaramin abu tare da kayan aikin ku. Wannan ma'aunin ya bambanta dangane da siffar shank.
	Screwdriver bits ko da yaushe suna da hex shank, wanda ke da siffar hexagonal. Hex shank diamita ana auna ta tsakiyar shank a kan lebur bangarorin.
	chucks mara igiyar waya sun zo cikin girman inci biyu: 1/4" (6.35mm) 3/8" (10mm)
	A taƙaice, mafi girman chuck, mafi girma diamita shank zai iya karɓa. Za ku ga cewa mafi yawan screwdrivers marasa igiya suna da chuck 6.35mm. Wannan yana nufin za su iya karɓar screwdrivers ko drills tare da iyakar shank diamita na 6.35mm.
	6.35mm chuck ya isa ga yawancin ayyukan screwdriving na gida. Idan kuna shirin yin ayyuka masu nauyi kamar hakowa, la'akari da zabar rawar soja/direba mara igiyar ruwa tare da chuck mafi girma.