Type Catalog No. Module Gear ratio Material Heat treatment Tooth surface finish Precision JIS B 1704：1978 Secondary Operations NOTE 2 Features hypoid-gear MHP 1～1.5 15～200 SCM415 Carburizing NOTE 1 Hobbed 3 △ High speed reduction ratio, high efficiency, high rigidity and compact gear assembly. Spiral bevel gears MBSG 2～4 2 SCM415 Carburized  Ground 1 △ High strength, abrasion-resistant and compact for high-speed & torque use. SBSG 2～4 1.5～3 S45C Teeth Induction Hardened Ground 2 △ Reasonably priced ground gear, yet remachinable except for the gear teeth. MBSA・MBSB 2～6 1.5～3 SCM415 Carburized Hobbed 4 × Ready to use without performing secondary operations. Strong and abrasion resistant. SBS 1～5 1.5～4 S45C Teeth Induction Hardened Hobbed 4 △ Large nos. of teeth and modules are offered in these affordable spiral bevel gears. Zerol Bevel Gears SBZG 2～3 1.5～2 S45C Teeth Induction Hardened Ground 2 △ These products are spiral bevel gears, which have a helix angle less than 10 degree. Zerol bevel gears receive forces from the same direction as straight bevel gears receive and has excellent precision properties. Straight bevel gears SB・SBY 1～8 1.5～4 S45C － Hobbed 3 ○ Popular series of straight bevel gears for many uses. Bevel Gears & Pinion Shafts (SB) 1.5～3 5 S45C Normalizing (pinion only) Hobbed 3 ○ Popular series of straight bevel gears for many uses. SUB 1.5～3 1.5～3 SUS303 － Hobbed 3 ○ Suitable for food machinery due to SUS303’s rust-resistant quality. PB 1～3 1.5～3 MC901 － Hobbed 4 ○ MC nylon products are light and can be used without lubricant. DB 0.5～1 2 Duracon (M90-44) － Injection molded 6 △ Injection molded, mass-produced products, suitable for office machines.

【NOTE 1】 Although these are carburized products, secondary operations can be performed as the bore and the hub portions are masked during the carburization. However, as a precaution, high hardness (HRC40 at maximum) occurs in some cases. 【NOTE 2】 ○Possible    △Partly possible ×Not possible