Spec

• number of teeth ratio: 2
• number of teeth: 20
• Reference circle diameter (mm): φ 100
• Tooth width (mm): 30
• A (mm): 22
• Hole diameter (mm): φ 22
• Total length (mm): 68.48
• Shape: B3
• Module: 5
• Module: 5
• Assembly distance (mm): 140
• Tip diameter (mm): φ 110.45
• Hole Length (mm): 63
• Boss Length (mm): 35
• Boss diameter (mm): φ 80
• Twist Direction: L
• Tap: -
• Keyway: -
• Support surface diameter: 57.84
• Gear precision: JIS B 1704: 1978: Class 4
• Tooth hardness: 50 to 60 HRC
• Tooth shape: Gleason
• Surface treatment: black dyeing
• Pressure angle: 20 °
• tooth finishes: cutting
• gear datum: holes
• Heat treatment: tooth surface induction hardening
• Helix Angle: 35
• Additional machining allowed/not allowed:
• material/Finishing: S 45 C
• Country of origin: Japan
• Code number: 128 -1250
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