Koyo 6915-ZZ shielded: 75 x 105 x 16mm

This Koyo deep groove ball bearing (shielded) is built on the most popular rolling bearing type. Deep, uninterrupted raceway grooves in the inner and outer rings carry radial load and a certain degree of axial load in either direction, at high speed. It carries a metal shield on each side (ZZ type) and is pre-lubricated, so no greasing is needed.

The bore is 75mm, the outside diameter 105mm and the width 16mm, with normal (CN) radial internal clearance and boundary dimensions to JIS B 1512. Koyo bearings are made by JTEKT Corporation.

Where this product is used

• Automotive: transmissions, electrical devices, and truck and trailer equipment
• Off-highway: construction equipment, agricultural equipment and railway rolling equipment
• Electrical equipment: standard motors and domestic electric appliances
• Measuring and medical instruments
• General industrial equipment

Features

• Deep, uninterrupted raceway grooves carry radial load and a certain degree of axial load in either direction
• Metal shield (ZZ) on both sides: non-contact, with small friction torque and good high speed performance
• Boundary dimensions to JIS B 1512, tolerances to JIS B 1514-1
• Basic dynamic load rating 24.4 kN and static 22.6 kN
• Standard cage: pressed steel

Key specifications

Fitting and use

Fit the ring that has the interference fit first, and press only on that ring, never through the balls.

Do not relubricate: the bearing is pre-lubricated with an appropriate volume of grease. The standard type runs from -30°C to +110°C.

Where axial load is large, make the shaft shoulder and housing shoulder larger than usual.

Choosing the right option

Check the bore d, outside diameter D and width B against your shaft and housing.

The basic dynamic load rating Cr relates to bearing life under rotating load, and the basic static load rating C0r to heavy or slow-turning duty. Compare the limiting speed for your size with the shaft speed. The speeds shown are the grease lubrication limits.

The ZZ shield is a non-contact type, with small friction torque, good high speed performance and good grease and dirt sealing. Koyo water resistance is economical, so choose a rubber sealed bearing where water is present.

Shielded and sealed bearings are designed for use with the inner ring rotating.

Also available from Koyo: the 6900 non-contact sealed range, the 6900 contact sealed range, the 6000 shielded range.