K-1 SYNCHRONOUS DRIVES ITEM PAGE TIMING PULLEYS ................................................................................................................................................K-1 – K-72 Terminology ................................................................................................................................................K-3 – K-4 XL ..........................................................................................................................................................................K5 L ................................................................................................................................................................K-6 – K-11 H .............................................................................................................................................................K-13 – K-17 XH ...........................................................................................................................................................K-18 – K-19 Selection Procedure ............................................................................................................................................K-20 – K-21 Speed Up Drives ............................................................................................................................................................K-60 Drive Selection XL ...................................................................................................................................K-22 – K-31 Drive Selection L .....................................................................................................................................K-32 – K-43 Drive Selection H ....................................................................................................................................K-44 – K-53 Drive Selection XH .................................................................................................................................K-54 – K-59 Non Stock Design ................................................................................................................................................K-61 – K-63 Timing Pulley Info ............................................................................................................................................................K-64 HP Ratings ..........................................................................................................................................................K-65 – K-68 Diameter Tables ...................................................................................................................................................K-69 – K-70 HTS ...............................................................................................................................................................K-71 – K-160 HTS Sprockets .......................................................................................................................................K-73 – K-84 Sprocket Diameter...................................................................................................................................K-85 – K-88 Sprocket Selection ..................................................................................................................................K-90 – K-93 Drive Selection Tables ...........................................................................................................................K-94 – K-145 Belt Tables ..........................................................................................................................................K-146 – K-154 Engineering ........................................................................................................................................K-155 – K-160 K-2 STOCK TIMING PULLEYS 1/5” - 7/8” PTCH “Q.D.” — TAPER BUSHED AND STOCK BORE PITCH PULLEY IN. DESIGNATION 1 ∕5″ XL (Extra Light) 3 ∕8″ L (Light) 1 ∕2″ H (Heavy) 7 ∕8″ XH (Extra Heavy) Timing Pulleys are manufactured to extremely close specifications and are stocked in minimum plain bore, Taper Bushed and Q.D. bushed styles depending on size and pitch. See tables for stock pulley types. Bushings are priced separately and must be added to pulley price. Illustrations below indicate stock pulley construction type listed in tables. E F H L E F H M L E L M F E L M F E F M K L E F L K M E L K M F “F” designation in pulley type means pulley is flanged. When drive center distance is eight times the diameter of the smaller pulley or when drive is operating on vertical shafts, both pulleys should be flanged. EX: TB 20L100 TB — Requires Taper Bushing 20 — Number of Teeth L— 3 ∕8″ Pitch (Light) 100 — Belt Width 1″ EX: 72L100SD 72 — Number of Teeth L— 3 ∕8″ Pitch (Light) 100 — Belt Width 1″ SD — Requires QD Bushing EX: 16L100 Min. Plain Bore Those pulley sizes shown stocked as stock bore only: max. bore listed is without keyway. If keyway is used reduce max. bore by twice kw depth. Dash 1 = Block Body Style Dash 2 = Web Style Dash 3 = Arm/Spoke Style Size XXH (1- 1 ∕4″ Pitch). Available as made-to-order. Call your nearest facility. Let us quote your made-to-order and large quantity requirements.