Specification Brand : HARFINGTON BulletPoint1 : Size - Aperture Diameter: 6mm; Outer Diameter: 20mm; Overall Thickness: 15mm; Groove Width: 7mm; Groove Depth: 4.4mm; Applicable Belts: 6mm PU round belt. BulletPoint2 : Material - The single-groove pulley is made of aluminum alloy, with small precision error, stable operation, high-speed rotation without shaking, effectively suppressing transmission noise and fluctuations, and improving the stability of the belt operation. BulletPoint3 : Usage - First, you need to measure the diameter of the shaft to be installed. For example, if the diameter of the shaft is 8 mm, the inner diameter of the pulley should be 8 mm, so that the installation will be just right. BulletPoint4 : Application - Silver aluminum alloy single slot is suitable for motors, micro spindles, model transmission design, motor shaft transmission, etc. BulletPoint5 : Note - A belt pulley with an outer diameter of 16mm is not suitable for use together with other sizes of belt pulleys. Color : Silver Tone ExternallyAssignedProductIdentifier : 9345665468200 ExternallyAssignedProductIdentifier1 : 0744144624530 ExternallyAssignedProductIdentifier2 : 744144624530 ItemName : HARFINGTON Single Groove Pulley 6mm Fixed Bore 20mm Outer Diameter Aluminum Alloy with Hex Wrench for Drilling Machine 6mm PU Round Belt ItemPackageDimensions_Height : 0.59 inches ItemPackageDimensions_Length : 5.51 inches ItemPackageDimensions_Width : 3.94 inches ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : v-belt-pulleys Manufacturer : HARFINGTON Material : Aluminum Alloy ModelNumber : AK64H WITH 7/8" BUSHING NumberOfItems : 1 PartNumber : hta230820hh000324 ProductDescription : The single-groove pulley is made of aluminum alloy, with small precision error, stable operation, high-speed rotation without shaking, effectively suppressing transmission noise and fluctuations, and improving the stability of the belt operation. Silver aluminum alloy single slot is suitable for motors, micro spindles, model transmission design, motor shaft transmission, etc. First, you need to measure the diameter of the shaft to be installed. For example, if the diameter of the shaft is 8 mm, the inner diameter of the pulley should be 8 mm, so that the installation will be just right. Notice: A belt pulley with an outer diameter of 16mm is not suitable for use together with other sizes of belt pulleys.