Catalogue number: M6B21 Features: ●Tooth precision: Standard grade (old JIS class 4, new JIS class N8) spur gear. Applications: ●For all kinds of machines, such as printing machines, automatic packaging machines, and electrical parts manufacturing lines. Specifications: ●Module: 6 ●Number of teeth: 21 ●Reference circle diameter d (mm): 126 ●Tooth width b (mm): 60 ●Hole diameter (mm): φ28 ●Total length l (mm): 88 ●Shape: S1 ●Tooth tip circle diameter (mm): φ138 ●Reference circle diameter (mm): φ126 ●Boss diameter (mm): φ105 ●Tooth width (mm): 60 ●Total length (mm): 88 ●Tooth shape: Standard teeth ●Pressure angle: 20° Material/Finish: ●Carbon steel for machine construction ●Surface treatment: Black dyeing
