Oil Seal TC 27x42x10mm - TC Double Lip NBR Rubber Oil Seal with Garter Spring hobby motors outer diameter is 3/8" inch

outer diameter is 3/8" inch and width is 5/32" inch

SUCFT206-20-PBT Thermoplastic Flange 2 Bolt Ball Bearing

S6902-2RS Hybrid Ceramic Sealed Bearing

Tungsten carbide balls are far tougher than steel and stand up better in extreme wear situations:

With its slim profile and high strength

Oil Seal TC 27x42x10mm - TC Double Lip NBR Rubber Oil Seal with Garter Spring hobby motors outer diameter is 3/8" inchThe TC27x42x10 is a double lip rotary shaft seal, block out dirt & lock in grease or oil. Designed for a shaft diameter of 27mm Width 10mm, with a bore diameter 42mm Nitrile Rubber Lip Material. Item Sku : TC27x42x10 Type : Oil and Grease Seal TC 27x42x10 mm Shaft diameter (inner): 27mm Housing bore (outer): 42mm Width : 10mm Size : 27mm x 42mm x 10mm Oil and Grease Seal Material : Nitrile Butadiene Rubber Temperature Range : 40 to 248F Ideal for both