[Hardened Miter Gears (SMA·SMB·SMC)] Series list   
diagram
Specifications
Precision grade JIS B 1704:1978 grade 4 Surface hardness HRC50 - 60
Gear teeth Gleason Surface treatment Black oxide
Pressure angle 20° Surface finish Cut
Material S45C Datum reference surface for teeth cutting Bore (H7)
Heat treatment Tooth surfaces induction hardened Modifications Not possible
  1 / 1 Page      50 items in total    Module   No. of Teeth       
< 1 >    precaution    
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
Keyway
Width
Keyway
Depth
Thread Size Threaded hole
L
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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  SMA1-20 
  SMB1-20 
  SMA1.5-20 
  SMB1.5-20 
  SMA2-20 
  SMB2-20 
  SMA2.5-20 
  SMB2.5-20 
  SMA3-20 
  SMB3-20 
  SMC3-20 
  SMA3.5-20 
  SMB3.5-20 
  SMA4-20 
  SMB4-20 
  SMC4-20 
  SMA5-20 
  SMB5-20 
  SMC5-20 
  SMA6-20 
  SMB6-20 
  SMC6-20 
  SMA8-20 
  SMA1-25 
  SMA1.5-25 
  SMA2-25 
  SMB2-25 
  SMA2.5-25 
  SMB2.5-25 
  SMA3-25 
  SMB3-25 
  SMA3.5-25 
  SMB3.5-25 
  SMA4-25 
  SMB4-25 
  SMA5-25 
  SMA6-25 
  SMA1-30 
  SMA1.5-30 
  SMA2-30 
  SMB2-30 
  SMA2.5-30 
  SMB2.5-30 
  SMA3-30 
  SMB3-30 
  SMA3.5-30 
  SMB3.5-30 
  SMA4-30 
  SMB4-30 
  SMA5-30 
120BT8162021.412013.9510.7181259.86  M440.0910.0380.030.130.016 SMA1-20
120BT10162021.412013.9510.71812.07510  M440.0910.0380.030.130.014 SMB1-20
1.520BT10263032.123021.2416.061319815.37  M46.50.320.130.050.150.069 SMA1.5-20
1.520BK12263032.123021.2416.061319815.3741.8M56.50.320.130.050.150.063 SMB1.5-20
220BK14344042.833724.8918.4114221021.7252.3M570.730.310.060.160.14 SMA2-20
220BK15344042.833724.8918.4114221021.7252.3M570.730.310.060.160.13 SMB2-20
2.520BK18425053.544832.5424.7719291228.0652.3M69.51.390.600.070.170.27 SMA2.5-20
2.520BK20425053.544832.5424.7719291228.0662.8M69.51.390.600.070.170.26 SMB2.5-20
320BK22506064.245839.8430.1223351531.5773M611.52.471.080.080.180.47 SMA3-20
320BK25506064.245839.8430.1223351531.5773M811.52.471.080.080.180.44 SMB3-20
320BK20506064.245839.8430.1223351531.5762.8M611.52.471.080.080.180.49 SMC3-20
3.520BK28607074.956544.1332.4725401839.0973M812.53.981.750.100.250.71 SMA3.5-20
3.520BK30607074.956544.1332.4725401839.0983.3M812.53.981.750.100.250.68 SMB3.5-20
420BK30648085.657550.7837.8327452043.4373M813.55.852.590.120.271.00 SMA4-20
420BK32648085.657550.7837.8327452043.43103.3M813.55.852.590.120.270.96 SMB4-20
420BK25648085.657550.7837.8327452043.4383.3M813.55.852.590.120.271.07 SMC4-20
520BK4080100107.079060.3843.5430542654.46103.3M81511.75.230.140.341.80 SMA5-20
520BK3080100107.079060.3843.5430542654.4683.3M81511.75.230.140.342.04 SMB5-20
520BK3580100107.079060.3843.5430542654.46103.3M81511.75.230.140.341.93 SMC5-20
620BK45100120128.4810467.6748.2434603067.15123.3M81719.38.920.160.363.19 SMA6-20
620BK50100120128.4810467.6748.2434603067.15143.8M81719.38.920.160.363.01 SMB6-20
620BK40100120128.4810467.6748.2434603067.15123.3M81719.38.920.160.363.35 SMC6-20
820BK60130160171.3112573.3350.6630623595184.4M101541.419.80.200.455.96 SMA8-20
125BT10202526.412315.1611.21814615.03  M440.150.0720.030.130.029 SMA1-25
1.525BK123037.539.623422.2516.3111.519919.5441.8M55.750.510.250.050.150.10 SMA1.5-25
225BK18405052.834024.3316.4110201226.0662.8M651.200.600.060.160.19 SMA2-25
225BK15405052.834024.3316.4110201226.0652.3M551.200.600.060.160.20 SMB2-25
2.525BK205062.566.045030.4120.5212.5261534.5752.3M662.351.190.070.170.39 SMA2.5-25
2.525BK185062.566.045030.4120.5212.5261534.5762.8M662.351.190.070.170.40 SMB2.5-25
325BK30607579.246037.8124.6215322037.4373M87.54.312.200.080.180.63 SMA3-25
325BK25607579.246037.8124.6215322037.4383.3M87.54.312.200.080.180.69 SMB3-25
3.525BK327087.592.457043.2328.7217.5372246.77103.3M88.56.633.420.100.251.04 SMA3.5-25
3.525BK287087.592.457043.2328.7217.5372246.7783.3M88.56.633.420.100.251.09 SMB3.5-25
425BK3580100105.668049.3232.8320432555.29103.3M8109.875.120.120.271.59 SMA4-25
425BK3080100105.668049.3232.8320432555.2983.3M8109.875.120.120.271.68 SMB4-25
525BK50100125132.0710060.8241.0425503065.15123.3M812.518.89.870.140.342.86 SMA5-25
625BK55120150158.4812072.3249.2430613583164.3M101531.316.90.160.365.13 SMA6-25
130BK12243031.412817.7113.711016619.0341.8M550.200.110.030.130.047 SMA1-30
1.530BK15364547.124328.2421.5616251025.7152.3M580.740.420.050.150.19 SMA1.5-30
230BK20456062.835029.4221.4112.5251236.0662.8M66.251.630.940.060.160.32 SMA2-30
230BK15456062.835029.4221.4112.5251236.0652.3M56.251.630.940.060.160.35 SMB2-30
2.530BK25607578.546236.2826.2717321547.5783.3M88.53.191.860.070.170.68 SMA2.5-30
2.530BK20607578.546236.2826.2717321547.5762.8M68.53.191.860.070.170.73 SMB2.5-30
330BK32709094.247545.4732.1220402053.43103.3M8105.893.460.080.181.15 SMA3-30
330BK25709094.247545.4732.1220402053.4383.3M8105.893.460.080.181.25 SMB3-30
3.530BK3590105109.958549.6634.9725452267.77103.3M812.59.015.340.100.252.01 SMA3.5-30
3.530BK3090105109.958549.6634.9725452267.7783.3M812.59.015.340.100.252.10 SMB3.5-30
430BK40100120125.669554.5237.8325502579.29123.3M812.513.47.990.120.272.81 SMA4-30
430BK30100120125.669554.5237.8325502579.2983.3M812.513.47.990.120.273.03 SMB4-30
530BK55130150157.0712068.5648.5435623099.15164.3M1017.525.515.30.140.345.56 SMA5-30
Product Precautions
[Caution on Product Characteristics]  ①Keyways are made according to JIS B1301 standards and Js 9 tolerance. For products with a tapped hole, a set screw is included as an accessory.
 ②The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see precaution for more details.
 ③Dimensions 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.
 ④The keyway dimensions of items with "※"marks do not conform to JIS Standards.

[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.
 ②Due to gear teeth induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 2 to 3 mm).
  Please click here to Unit Price & Delivery Time.