Made from carbon steel with spiral teeth, these gears handle heavier loads at higher speeds than bevel gears with straight teeth because their teeth stay in contact longer. Their teeth engage gradually, which reduces vibration and noise, and they’re hardened for extra wear resistance. Use these gears to transmit motion at a right angle while changing shaft speed and torque. They reduce speeds at ratios of 2:1, 3:1, or 4:1. Customize their machinable bore to fit them on a variety of shafts. They’re also known as spiral bevel gears.
A complete set consists of a gear and pinion (sold separately). The gear is larger than the pinion, but for them to mesh correctly, they must have the same pressure angle, module, and face width.
Speed ratio is the ratio by which shaft speed is reduced when transferring motion from pinion to gear. To increase shaft speed, transfer motion from gear to pinion. Changing shaft speed also changes torque: as speed decreases, torque increases.
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Width, mm Pressure
Angle Speed
Ratio Number
of Teeth Gear Pitch
Dia., mm OD,
mm Overall
Width, mm For Shaft
Diameter, mm Mounting Distance
(A), mm Material Diameter,
mm Width,
mm Each
Machinable Round Bore
6 20° 2:1 40 40 40.52 15 8-18 22 Black-Oxide 1045 Carbon Steel 25 8 6010N16 $54.35
10 20° 2:1 40 60 60.75 24.9 10-25 35 Black-Oxide 1045 Carbon Steel 38 15 6010N13 78.80
12 20° 4:1 60 90 90.36 24.1 12-45 32 Black-Oxide 1045 Carbon Steel 60 12 6010N14 233.01
15 20° 3:1 45 90 90.67 30.3 12-30 40 Black-Oxide 1045 Carbon Steel 40 17 6010N38 133.67
Pinions
Gear and Pinion Sold Separately
Hub
Face
Width, mm Pressure
Angle Speed
Ratio Number
of Teeth Gear Pitch
Dia., mm OD,
mm Overall
Width, mm For Shaft
Diameter, mm Mounting Distance
(B), mm Material Diameter,
mm Width,
mm Each
Machinable Round Bore
6 20° 2:1 20 20 22.08 13.7 6-9 28 Black-Oxide 1045 Carbon Steel 16 7 6010N15 $34.22
10 20° 2:1 20 30 33.08 25.5 8-15 46 Black-Oxide 1045 Carbon Steel 25 15 6010N12 44.37
12 20° 4:1 15 23 26.09 23 8-10 56 Black-Oxide 1045 Carbon Steel 18 10 6010N11 79.73
15 20° 3:1 15 30 34.78 29.7 10-14 60 Black-Oxide 1045 Carbon Steel 24 14 6010N31 50.49
