Precision 20^o pressure angle stainless steel racks from Quality Transmission Components are stocked in 21 sizes in pitch size modules 1~4. These hobbed and passivated racks, identified as the SUR, SURF, and SURFD Series, are made from SUS304 stainless steel with tooth hardness of less than 187HB. These Series conform to KHK R 001 grade 5 standards. Total rack lengths range from 505 mm to 1010 mm. Face widths range from 10 mm to 40 mm. The SURF Series features finished ends enabling the user to join multiple segments together to form longer lengths. The SURFD Series adds bolt holes on the face.