noun
belt pulley
A mechanical wheel used with a belt to transmit power. Technical term; not an everyday word.
この機械は調べ車で動力を伝えている。
This machine transmits power using a belt pulley.
滑車 is a general pulley (often for ropes), while 調べ車 specifically refers to a belt pulley in machinery.
Compound of 調べ (shirabe, 'investigation, tuning') and 車 (kuruma, 'wheel'). The exact derivation is uncertain; the term is a technical compound for a belt pulley.