Overview Reviews Product Description Designed with two Lovejoy D type universal joints and a center connecting shaft DD and DDX type universal joints are tailored to your specific application requirements This configuration compensates for both parallel misalignment and shaft separation Round, hex, splined, or keyway bores are supplied per your requirements Boot retaining grooves are standard. (Boots are available for purchase separately.) Lubrication is required for optimal wear - boots and lubricant extend universal joint life Timken Lovejoy Master Catalog Product Videos Custom Field Series DD-12B Shaft diameter 1 x 1" Keyway size No keyway Coupling type Universal joint Product Reviews Write a Review Write a Review × Timken 1 x 1" Shaft DD-12B Series Lovejoy® Double Joint Universal Joint DD12B-UJ-1"X1"-NKW NSS BE Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *