Catalogue number: M5B21 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: 5 ●Number of teeth: 21 ●Reference circle diameter d (mm): 105 ●Tooth width b (mm): 50 ●Hole diameter (mm): φ25 ●Total length l (mm): 75 ●Shape: S1 ●Tooth tip circle diameter (mm): φ115 ●Reference circle diameter (mm): φ105 ●Boss diameter (mm): φ90 ●Tooth width (mm): 50 ●Total length (mm): 75 ●Tooth shape: Standard teeth ●Pressure angle: 20° Material/Finish: ●Carbon steel for machine construction ●Surface treatment: Black dyeing
