Introduction As a precision spare part for MK8/MK9 cigarette rolling machines, this large gear combines accurate cutting with a hard, wear-resistant alloy body. It is made to the original equipment specification so it restores correct drive timing and keeps the production line stable over a long service life. Basic Info. Product name Large Transmission Gear Model UB-GR-600 Material Alloy steel Hardness High, wear-resistant Size OEM standard, customized available Compatible