車軸 is read as しゃじく (shajiku) and means axle.
しゃじく
shajiku
しゃじくをながす
to rain heavily
しゃじくそう
bastard lupine (Trifolium lupinaster)
しゃじくもしょくぶつ
charophyte
しゃじくも
stonewort (esp. Braun's stonewort, Chara braunii)
しゃじくもるい
stoneworts
ぜんしゃじく
front axle
じくりゅうすいしゃ
axial flow turbine
しゃしょう
(train) conductor
しゃけん
vehicle inspection
しゃかんきょり
distance between two cars
しゃりょうきち
rail yard
しゃけんしょう
automobile inspection certificate