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Drive Pulley Adapters

for Reinforced Nylon Round, Flat, and V Pulleys

Drive adapters are molded into our reinforced nylon round, flat and vee idler pulley line instead of bearings to convert them into drive pulleys. Hubs are made from sintered powder steel, lightly oil impregnated to resist rusting. All come with keyway and set screw.

New larger sizes: 3/4" and 1" (19.1mm and 25.4mm) diameter -- allow use with much larger shafts.

Part No.	Shaft dia.	OD	Stand-off	Keyway
DA25*	0.25" (6.3 mm)	1"	0.375" (9.5mm)	No keyway, set screw only
DA38	0.375" (9.5 mm)	1"	0.375" (9.5mm)	0.125" (3.2mm)
DA50	0.50" (12.7 mm)	1"	0.375" (9.5mm)	0.125" (3.2mm)
DA63*	0.625" (15.9 mm)	1.45"	0.75" (19mm)	0.188" (4.8mm) **
DA75	0.75" (19 mm)	1.45"	0.75" (19mm)	0.188" (4.8mm)
DA100	1.00" (25.4mm)	1.45"	0.75" (19mm)	0.25" (6.3mm) **

(includes Set Screw)

*DA25 and DA63 drive adapters use bronze bushings to reduce our DA38 and DA75 bores down to 1/4" and 5/8" respectively.

**DA63 and DA100 require a rectangular key 3/16" x 1/4". Alternately, 1/4" square keys will work if you machine 0.063" off one side of the key.

Stand-off from outer edge of drive pulley = Stand-off - (Width of drive pulley - 0.472")/2

Example: Stand-off from outer edge of Drive Pulley 3/8" x 3"
with DA50 = .375" - (0.65" - 0.472")/2 = 0.29"

Stand-off from center of drive pulley = Stand-off + 0.236"

Example: Stand-off from center of Drive Pulley 3/8" x 3"
with DA50 = 0.375" + .236" = 0.61"

For the best in drive pulley adapters, insist on DuraBelt.

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