Precision Gauge Block
Mageji mabhuroko (anozivikanwawo semageji mabhuroko, Johansson geji, anotsvedza, kana maJo blocks) isystem yekugadzira hurefu chaihwo.Iyo yega geji block isimbi kana ceramic block yakave nemazvo pasi uye yakaroverwa kune chaiyo ukobvu.Mageji mabhuroko anouya seti dzemabhuroko ane huwandu hwehurefu hwakajairika.Mukushandiswa, mabhururu akaturikidzana kuita hurefu hunodiwa (kana kureba).
Chinhu chakakosha chegeji mabhuroko ndechekuti anogona kubatanidzwa pamwe chete nekusagadzikana kudiki kwedimensional.Mabhuroko anobatanidzwa nekutsvedza kunonzi wringing, izvo zvinoita kuti nzvimbo dzawo dzakati sandarara dzibatane.Nhamba shoma yegeji mabheji inogona kushandiswa kugadzira urefu hwakarurama mukati mehupamhi hwakawanda.Nekushandisa mabhuroko matatu panguva yakatorwa kubva paseti yezvibhuroko makumi matatu, munhu anogona kugadzira chero hurefu hwe1000 kubva pa3.000 kusvika 3.999 mm mumatanho 0.001 mm (kana 0.3000 kusvika 0.3999 inches mumatanho 0.0001 inch).Zvigero zvegeji zvakagadzirwa muna 1896 nemuchina wechiSweden Carl Edvard Johansson.Iwo anoshandiswa sereferensi yekuyeresa yekuyeresa michina inoshandiswa muzvitoro zvemuchina, senge micrometers, sine mabara, calipers, uye dial zviratidzo (kana zvichishandiswa mubasa rekuongorora).Gauge blocks ndiyo nzira huru yekureba yakajairwa inoshandiswa neindasitiri.