KHK Gears - Hardened Miter Gears (SMA·SMB·SMC)

Unit of Measure

Items	SMA1.5-20 KHK SMA1.5-20, Module 1.5, 20 Tooth, Hardened Carbon Steel Miter Gears	SMA1.5-25 KHK SMA1.5-25, Module 1.5, 25 Tooth, Hardened Carbon Steel Miter Gears	SMA1.5-30 KHK SMA1.5-30, Module 1.5, 30 Tooth, Hardened Carbon Steel Miter Gears	SMA1-20 KHK SMA1-20, Module 1, 20 Tooth, Hardened Carbon Steel Miter Gears	SMA1-25 KHK SMA1-25, Module 1, 25 Tooth, Hardened Carbon Steel Miter Gears
Gear Type	N/A Miter Gears
Construction	N/A Hardened Carbon Steel Miter Gears
Bore Type	N/A Finished
Gear Ratio	N/A 1
Module	N/A 1.5	N/A 1.5	N/A 1.5	N/A 1	N/A 1
No. of Teeth	N/A 20	N/A 25	N/A 30	N/A 20	N/A 25
Shape	N/A BT	N/A BK	N/A BK	N/A BT	N/A BT
Bore (A)	N/A 0.394 in10 mm	N/A 0.472 in12 mm	N/A 0.591 in15 mm	N/A 0.315 in8 mm	N/A 0.394 in10 mm
Hub Diameter (B)	N/A 1.024 in26 mm	N/A 1.181 in30 mm	N/A 1.417 in36 mm	N/A 0.630 in16 mm	N/A 0.787 in20 mm
Pitch Diameter (C)	N/A 1.181 in30 mm	N/A 1.476 in37.5 mm	N/A 1.772 in45 mm	N/A 0.787 in20 mm	N/A 0.984 in25 mm
Outer Diameter (D)	N/A 1.265 in32.12 mm	N/A 1.560 in39.62 mm	N/A 1.855 in47.12 mm	N/A 0.843 in21.41 mm	N/A 1.040 in26.41 mm
Mounting Distance (E)	N/A 1.181 in30 mm	N/A 1.339 in34 mm	N/A 1.693 in43 mm	N/A 0.787 in20 mm	N/A 0.906 in23 mm
Total Length (F)	N/A 0.836 in21.24 mm	N/A 0.876 in22.25 mm	N/A 1.112 in28.24 mm	N/A 0.549 in13.95 mm	N/A 0.597 in15.16 mm
Hub Width (H)	N/A 0.512 in13 mm	N/A 0.453 in11.5 mm	N/A 0.630 in16 mm	N/A 0.315 in8 mm	N/A 0.315 in8 mm
Length Of Bore (I)	N/A 0.748 in19 mm	N/A 0.748 in19 mm	N/A 0.984 in25 mm	N/A 0.472 in12 mm	N/A 0.551 in14 mm
Face Width (J)	N/A 0.394 in8 mm	N/A 0.472 in9 mm	N/A 0.591 in10 mm	N/A 0.315 in5 mm	N/A 0.394 in6 mm
Holding Surface Diameter (K)	N/A 0.605 in15.37 mm	N/A 0.769 in19.54 mm	N/A 1.012 in25.71 mm	N/A 0.388 in9.86 mm	N/A 0.592 in15.03 mm
Keyway (W x D)	N/A	N/A 0.157 x 0.071 in4 x 1.8 mm	N/A 0.197 x 0.091 in5 x 2.3 mm	N/A	N/A
Set Screw Size	N/A M4	N/A M5	N/A M5	N/A M4	N/A M4
Set Screw Offset (L)	N/A 0.256 in6.5 mm	N/A 0.226 in5.75 mm	N/A 0.315 in8 mm	N/A 0.157 in4 mm	N/A 0.157 in4 mm
Length from Crown to Back	N/A 0.632 in16.06 mm	N/A 0.642 in16.31 mm	N/A 0.849 in21.56 mm	N/A 0.422 in10.71 mm	N/A 0.441 in11.21 mm
Pressure Angle	N/A 20 º
Precision Grade	N/A JIS B 1704:1978 grade 4
Gear Teeth Type	N/A Gleason
Heat Treatment	N/A Teeth Induction hardened
Bending Strength	N/A 3.13 N·m0.319 kgf·m	N/A 4.98 N·m0.508 kgf·m	N/A 7.22 N·m0.736 kgf·m	N/A 0.9 N·m0.0918 kgf·m	N/A 1.48 N·m0.151 kgf·m
Surface Durability	N/A 1.31 N·m0.134 kgf·m	N/A 2.44 N·m0.249 kgf·m	N/A 4.08 N·m0.416 kgf·m	N/A 0.37 N·m0.0377 kgf·m	N/A 0.71 N·m0.0724 kgf·m
Backlash	N/A 0.002-0.0059 in0.05-0.15 mm	N/A 0.002-0.0059 in0.05-0.15 mm	N/A 0.002-0.0059 in0.05-0.15 mm	N/A 0.0012-0.0051 in0.03-0.13 mm	N/A 0.0012-0.0051 in0.03-0.13 mm
Material	N/A S45C (AISI 1045) Carbon Steel
Tooth Hardness	N/A HRC 50-60
Surface Treatment	N/A Black oxide coating
Weight	N/A 0.069 kg0.152 lb	N/A 0.1 kg0.220 lb	N/A 0.19 kg0.419 lb	N/A 0.016 kg0.035 lb	N/A 0.029 kg0.064 lb