1638ZZKSK Nachi Bearing, the 1638ZZKSK inner diameter is 3/4" inch, the 1638ZZKSK outer diameter is 2" inch, 1638ZZKSK width is 9/16" inch.

• Item: 1638ZZKSK Nachi Ball Bearing
• Type: Nachi Deep groove Ball Bearing
• Closures: Double shielded with Metal shields Z/ZZ/2Z
• Dimensions: 3/4" x 2" x 9/16" inch
• ID (inner diameter)/Bore: 3/4" inch
• OD (outer diameter): 2" inch
• Width/Height/thickness: 9/16" inch
• Quantity: One Bearing
• Made in Japan