Trapped rollers Freewheels NMD model is non-bearing supported, so bearings are required to support axial & radial loads.
Lubrication & Sealing must be provided for Installation.
Standard Lubrication is Oil.
Inner race is keyed to shaft & Outer race has a positive n6 Tolerance to give a press fit in Housing with a H7 Tolerance. Additional side notches are provided for positive Torque Transmission.
If the Housing Tolerance is to K6, use of notches is not necessary, but the Housing must be strong enough to not expand after Assembly.
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