Lightnin High Speed, High-Shear Mixer. Model: NS1. S/N: 7715606. Lightnin Motor, 1/3 hp. Maximum chuck size: 5/8 in. Direct drive portable mixers are preferred where high fluid shear is desirable and for small batch mixing. Motor and shaft are coupled directly with pilot and keyway for accurate alignment and positive connection. Overall dimensions: 9 in. L x 9 in. W x 16 in. H.