[Carburized & Hardened Miter Gears (MM)] Series list   
diagram
Specifications
Precision grade JIS B 1704:1978 grade 4 Surface hardness HRC55 - 60
Gear teeth Gleason Surfave treatment Black oxide
Pressure angle 20° Surface finish Cut
Material SCM415 Datum reference surface for teeth cutting Bore (H7)
Heat treatment Carburized.(*1) Modifications The masked areas of carburized parts can be modified.
(*1) Bore and Hub Dia. Are machinable due to masking carburization
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Catalog No.
Module
Number of Teeth
Shape Bore
A
Hub dia.
B
Pitch dia.
C
Outside dia.
D
Mounting distance
E
Total length
F
Crown to back length
G
Hub width
H
Length of bore
I
Face width
J
Holding surface dia.
K
Allowable torque(kgf·m)
Bending strength
Allowable torque(kgf·m)
Surface durability
Backlash low
(mm)
Backlash up
(mm)
Weight
(kg)
Unit Price
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  MM2-20 
  MM2.5-20 
  MM3-20 
  MM4-20 
  MM5-20 
  MM2-25 
  MM2.5-25 
  MM3-25 
  MM4-25 
  MM5-25 
  MM2-30 
  MM2.5-30 
  MM3-30 
  MM4-30 
  MM5-30 
220B312344042.833522.2416.411220924.541.540.990.060.160.13 MM2-20
2.520B315425053.544528.8921.7716261130.892.961.940.070.170.27 MM2.5-20
320B316526064.245031.1922.1216271434.45.33.520.080.180.43 MM3-20
420B320658085.666539.4927.8317.5351849.0912.38.280.120.270.93 MM4-20
520B32580100107.079060.3843.5430542654.4626.117.80.140.342.15 MM5-20
225B312455052.834024.3316.4112.5211228.062.72.050.060.160.25 MM2-25
2.525B3165562.566.035030.4120.5215271536.575.274.050.070.170.47 MM2.5-25
325B320657579.246037.8124.6217.5332039.439.667.490.080.180.81 MM3-25
425B32585100105.668049.3232.8322.5442557.2922.117.40.120.271.89 MM4-25
525B328100125132.0710060.8241.0425503065.1542.133.60.140.343.41 MM5-25
230B312456062.835029.4321.4112.5251236.063.643.170.060.160.37 MM2-30
2.530B316607578.546236.2826.2717321547.577.116.270.070.170.76 MM2.5-30
330B320709094.247545.4732.1220402053.4313.211.70.080.181.32 MM3-30
430B328100120125.669554.5237.8325502579.2929.927.10.120.273.09 MM4-30
530B328130150157.0712068.5648.5435623099.1556.952.30.140.346.47 MM5-30
Product Precautions
[Caution on Product Characteristics]  ①The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see precaution for more details.
 ②Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips.

[Caution on Secondary Operations]  ①Please read “Cautions on Performing Secondary Operations”when performing modification and/or secondary operations of Miter Gears. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available.
 ②In the illustration, the area surrounded with -- - - -- line is masked during the carburization process and can be modified. However, care should be exercised since the hardness is high (approx. HRC40, maximum).
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